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Add the mailing list archive (#8) I will be shutting down ~motiejus/bazel-zig-cc@lists.sr.ht within days. Now that comms are in Slack and github issues/PRs, let's add the archive for historical reference. It can be opened and read through like this: mutt -R -f mailing-list-archive.mbox
2023-03-08 19:16:22 +02:00
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From: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@uber.com>
Date: Mon, 6 Sep 2021 08:14:46 +0300
Message-ID: <CAK+t98X2fo+_f+W1o8hzYX_CXmHVPMNfBN2CoM+soRGgMELOQQ@mail.gmail.com>
Subject: Re: Cross-compilation with zig
To: Adam Bouhenguel <adam@bouhenguel.com>, ~motiejus/bazel-zig-cc@lists.sr.ht
Cc: Steeve Morin <steeve.morin@gmail.com>, Zhongpeng Lin <zplin@uber.com>
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+ ~motiejus/bazel-zig-cc@lists.sr.ht (please subscribe[0]). Also
switching from top-down to bottom-up posting.
On Sun, Sep 5, 2021 at 10:14 PM Adam Bouhenguel <adam@bouhenguel.com> wrote=
:
>
> Thanks for adding me to the thread, Motiejus.
>
> Steeve, I'm very curious to hear how your investigation goes. Please keep=
me posted!
>
> I've been bitten a few times now by regressions in zig cc. Both 0.7.1 and=
0.9-dev have problems with C++ exceptions and break runtime behavior of th=
ird party libraries I'm using.
Zig 0.7.1 to zig 0.9-dev moved from clang-11 to clang-12, so, from the
surface, I would attribute behavior changes to this. Did you narrow
this down to something specific?
> Seems like the ability to build a set of specific projects in bazel (with=
a hermetic zig cc based toolchain) might be helpful for keeping everyone o=
n the same page.
Have you noticed regressions with `zig cc` when upgrading zig? Since
it is covered by "bug stability program[1]", I expect zig upstream to
be quite responsive with regressions there. If C++ behavior changes,
it's probably a fault of a new clang, which should be reported to
Apple (likely with help of zig developers, since they have done this
many times).
> To this end, what do you folks think about having a small suite of accept=
ance tests for the toolchain?
We already have //test:hello[2]. Feel free to add yours.
> As a bonus we might be able to use qemu to ensure that the cross-compiled=
artifacts actually work.
I am looking for multi-arch build support in sr.ht, which is "not yet
available"[3], which would be ideal.
Currently I am cross-compiling to a few architectures and checking
whether the resulting "file" command returns an expected string. I
agree qemu-system-<arch> is a good next step. What are your
architectures of interest?
Motiejus
[0]: https://lists.sr.ht/~motiejus/bazel-zig-cc
[1]: https://ziglang.org/download/0.8.0/release-notes.html#zig-cc
[2]: https://git.sr.ht/~motiejus/bazel-zig-cc/tree/main/item/test/BUILD
[3]: https://man.sr.ht/builds.sr.ht/compatibility.md
[4]: https://git.sr.ht/~motiejus/bazel-zig-cc/tree/main/item/.build.yml
> Cheers,
> Adam
>
> On Thu, Sep 2, 2021, 06:31 Motiejus Jak=C5=A1tys <motiejus@uber.com> wrot=
e:
>>
>> Let me know how it goes. I set up a mailing list on srht for patches, if=
any.
>>
>> On Thu, Sep 2, 2021, 15:42 Steeve Morin <steeve.morin@gmail.com> wrote:
>>>
>>> Hey Motiejus,
>>>
>>> Thank for working on that!
>>> I'll see if I can hack on it one weekend. What I'd like though is have =
the `zig cc` toolchain have the same level of features as the "host" toolch=
ain.
>>> And it feels to me that doing the toolchain.bzl file by hand isn't the =
right way to do it. I'm still looking into how bazel generates it and see i=
f we can let it do it.
>>>
>>> Steeve
>>>
>>>
>>> On Wed, 1 Sept 2021 at 21:03, Motiejus Jak=C5=A1tys <motiejus@uber.com>=
wrote:
>>>>
>>>> Zhongpeng, thank you for bringing the group together. +Adam, who creat=
ed the initial toolchain (mine is a fork of Adam's initial hard work), and =
he has obvious interest in the toolchain too.
>>>>
>>>> Steeve, my zig-cc toolchain is hosted here. I am obviously interested =
in solving all the outlined issues, and rules_go#2894 is one of them. I am =
currently very limited in capacity myself, but happy to merge improvements,=
either the mentioned issues or anything else you find reasonably necessary=
for usage of the toolchain.
>>>>
>>>> Motiejus
>>>>
>>>> On Wed, Sep 1, 2021 at 9:17 PM Zhongpeng Lin <zplin@uber.com> wrote:
>>>>>
>>>>> Hello Motiejus,
>>>>>
>>>>> In today's Bazel-Go maintainers meeting, Steeve (cc'ed) mentioned tha=
t he wanted to work on zig-based toolchain for rules_go. Steeve is also an =
expert in cgo support in rules_go. Checking the last email you sent, it see=
ms you've made good progress on that. Do you still need help on rules_go#28=
94? Steeve is probably the most knowledgeable person for you to talk to if =
you need.
>>>>>
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From: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@uber.com>
Date: Tue, 14 Sep 2021 15:18:04 +0300
Message-ID: <CAK+t98Ww6cWU+MRtaPQ=_WVe_mwYmf0h9HHj_O0D-yuXyvoS3A@mail.gmail.com>
Subject: Re: Cross-compilation with zig
To: Steeve Morin <steeve.morin@gmail.com>
Cc: Adam Bouhenguel <adam@bouhenguel.com>, ~motiejus/bazel-zig-cc@lists.sr.ht,
Zhongpeng Lin <zplin@uber.com>
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On Tue, Sep 14, 2021 at 2:21 AM Steeve Morin <steeve.morin@gmail.com> wrote:
>
> Alright you guys, I found a way to use bazel's auto toolchain configuration with zig!
> It's rather archaic for now, but it works, I got protoc compiled and running for both macos and linux.
>
> Still needs some love, I'll post updates in the next few days.
Looking forward to anything that will simplify it's setup/boilerplate.
> The main idea is to give to @bazel_tools//tools/cpp:unix_cc_configure.bzl configure_unix_toolchain() what it want, and that's it!
Interesting!
I have slightly updated the toolchain today:
- added support for darwin-arm64 and linux-arm64 host (though don't
have an arm64 machine to test this with).
- tried to upgrade zig itself, but cross-compilation to darwin-amd64
fails with it; there seems to be a regression somewhere. I will look
into it sometime soon.
... so please rebase before sending patches.
Regards,
Motiejus
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Sender: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <desired.mta@gmail.com>
Date: Fri, 29 Oct 2021 07:45:31 +0300
From: Motiejus =?utf-8?Q?Jak=C5=A1tys?= <motiejus@jakstys.lt>
To: Motiejus =?utf-8?Q?Jak=C5=A1tys?= <motiejus@uber.com>
Cc: Steeve Morin <steeve.morin@gmail.com>,
Adam Bouhenguel <adam@bouhenguel.com>,
~motiejus/bazel-zig-cc@lists.sr.ht, Zhongpeng Lin <zplin@uber.com>
Subject: Re: Cross-compilation with zig
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On Tue, Sep 14, 2021 at 03:18:04PM +0300, Motiejus Jakštys wrote:
> On Tue, Sep 14, 2021 at 2:21 AM Steeve Morin <steeve.morin@gmail.com> wrote:
> >
> > Alright you guys, I found a way to use bazel's auto toolchain configuration with zig!
> > It's rather archaic for now, but it works, I got protoc compiled and running for both macos and linux.
> >
> > Still needs some love, I'll post updates in the next few days.
>
> Looking forward to anything that will simplify it's setup/boilerplate.
Hi all,
the way plans are panning out now, at some point in 2022H1 bazel-zig-cc
will be scrutinized by much more competent colleagues than myself,
before being moved to github.com/uber (or equivalent). After that major
changes will be much harder to make.
Steeve, if you are still considering on major changes in bazel-zig-cc,
this year is better than next year.
Motiejus
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From: ~mjonaitis <mjonaitis@git.sr.ht>
Date: Thu, 04 Nov 2021 18:54:42 +0200
Subject: [PATCH bazel-zig-cc] add go_binary override
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From: Mantas Jonaitis <mjonaitis@uber.com>
---
BUILD | 2 ++
README.md | 7 +++++++
rules/BUILD | 0
rules/go_binary_override.bzl | 27 +++++++++++++++++++++++++++
test/BUILD | 15 ++++-----------
5 files changed, 40 insertions(+), 11 deletions(-)
create mode 100644 rules/BUILD
create mode 100644 rules/go_binary_override.bzl
diff --git a/BUILD b/BUILD
index 07e6a04..a34acae 100644
--- a/BUILD
+++ b/BUILD
@@ -1,6 +1,8 @@
load("@bazel_gazelle//:def.bzl", "gazelle")
load("@com_github_bazelbuild_buildtools//buildifier:def.bzl", "buildifier")
=20
+# gazelle:map_kind go_binary go_binary //rules:go_binary_override.bzl
+
# gazelle:build_file_name BUILD
# gazelle:prefix github.com/motiejus/bazel-zig-cc
gazelle(name =3D "gazelle")
diff --git a/README.md b/README.md
index 8ae3935..7c83752 100644
--- a/README.md
+++ b/README.md
@@ -116,6 +116,13 @@ go_binary(
)
```
=20
+A workaround with [gazelle](https://github.com/bazelbuild/bazel-gazelle) `ma=
p_kind` directive is possible. This will override rules_go `go_binary` rule w=
ith `go_binary` which contains default `gc_linkopts` parameters. Add this lin=
e to your BUILD files (usually adding to root BUILD file will suffice) and ru=
n `gazelle` to automatically generate `load` statements.
+
+```
+# gazelle:map_kind go_binary go_binary @bazel-zig-cc//rules:go_binary_overri=
de.bzl
+```
+
+
## incorrect glibc version autodetection
=20
**Severity: Low**
diff --git a/rules/BUILD b/rules/BUILD
new file mode 100644
index 0000000..e69de29
diff --git a/rules/go_binary_override.bzl b/rules/go_binary_override.bzl
new file mode 100644
index 0000000..6ac14cf
--- /dev/null
+++ b/rules/go_binary_override.bzl
@@ -0,0 +1,27 @@
+load("@io_bazel_rules_go//go:def.bzl", go_binary_rule =3D "go_binary")
+
+"""
+go_binary overrides go_binary from rules_go and provides default
+gc_linkopts values that are needed to compile for macos target.
+To use it, add this map_kind gazelle directive to your BUILD.bazel files
+where target binary needs to be compiled with zig toolchain.
+
+Example: if this toolchain is registered as bazel-zig-cc in your WORKSPACE, =
add this to
+your root BUILD file
+# gazelle:map_kind go_binary go_binary @bazel-zig-cc//rules:go_binary_overri=
de.bzl
+"""
+def go_binary(**args):
+ new_args =3D {}
+ new_args["gc_linkopts"] =3D select({
+ "@platforms//os:macos": [
+ "-s",
+ "-w",
+ "-buildmode=3Dpie",
+ ],
+ "//conditions:default": [],
+ })
+ for k, v in args.items():
+ new_args[k] =3D v
+ print("Key: {}".format(k))
+ go_binary_rule(**new_args)
+
diff --git a/test/BUILD b/test/BUILD
index 133fe5a..415b9c2 100644
--- a/test/BUILD
+++ b/test/BUILD
@@ -1,4 +1,5 @@
-load("@io_bazel_rules_go//go:def.bzl", "go_binary", "go_library")
+load("//rules:go_binary_override.bzl", "go_binary")
+load("@io_bazel_rules_go//go:def.bzl", "go_library")
=20
go_library(
name =3D "hello_lib",
@@ -7,22 +8,14 @@ go_library(
importpath =3D "github.com/motiejus/bazel-zig-cc/test",
visibility =3D ["//visibility:private"],
deps =3D [
- "@com_github_datadog_zstd//:go_default_library",
- "@com_github_mattn_go_sqlite3//:go_default_library",
+ "@com_github_datadog_zstd//:zstd",
+ "@com_github_mattn_go_sqlite3//:go-sqlite3",
],
)
=20
go_binary(
name =3D "hello",
embed =3D [":hello_lib"],
- gc_linkopts =3D select({
- "@platforms//os:macos": [
- "-s",
- "-w",
- "-buildmode=3Dpie",
- ],
- "//conditions:default": [],
- }),
static =3D "on",
visibility =3D ["//visibility:public"],
)
--=20
2.32.0
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From: ~mjonaitis <mjonaitis@git.sr.ht>
Date: Thu, 04 Nov 2021 18:54:42 +0200
Subject: [PATCH bazel-zig-cc v2] add go_binary override
Message-ID: <163611954593.18596.9121656084211429991-0@git.sr.ht>
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From: Mantas Jonaitis <mjonaitis@uber.com>
---
BUILD | 2 ++
README.md | 7 +++++++
rules/BUILD | 0
rules/go_binary_override.bzl | 26 ++++++++++++++++++++++++++
test/BUILD | 15 ++++-----------
5 files changed, 39 insertions(+), 11 deletions(-)
create mode 100644 rules/BUILD
create mode 100644 rules/go_binary_override.bzl
diff --git a/BUILD b/BUILD
index 07e6a04..a34acae 100644
--- a/BUILD
+++ b/BUILD
@@ -1,6 +1,8 @@
load("@bazel_gazelle//:def.bzl", "gazelle")
load("@com_github_bazelbuild_buildtools//buildifier:def.bzl", "buildifier")
=20
+# gazelle:map_kind go_binary go_binary //rules:go_binary_override.bzl
+
# gazelle:build_file_name BUILD
# gazelle:prefix github.com/motiejus/bazel-zig-cc
gazelle(name =3D "gazelle")
diff --git a/README.md b/README.md
index 8ae3935..7c83752 100644
--- a/README.md
+++ b/README.md
@@ -116,6 +116,13 @@ go_binary(
)
```
=20
+A workaround with [gazelle](https://github.com/bazelbuild/bazel-gazelle) `ma=
p_kind` directive is possible. This will override rules_go `go_binary` rule w=
ith `go_binary` which contains default `gc_linkopts` parameters. Add this lin=
e to your BUILD files (usually adding to root BUILD file will suffice) and ru=
n `gazelle` to automatically generate `load` statements.
+
+```
+# gazelle:map_kind go_binary go_binary @bazel-zig-cc//rules:go_binary_overri=
de.bzl
+```
+
+
## incorrect glibc version autodetection
=20
**Severity: Low**
diff --git a/rules/BUILD b/rules/BUILD
new file mode 100644
index 0000000..e69de29
diff --git a/rules/go_binary_override.bzl b/rules/go_binary_override.bzl
new file mode 100644
index 0000000..cb37807
--- /dev/null
+++ b/rules/go_binary_override.bzl
@@ -0,0 +1,26 @@
+load("@io_bazel_rules_go//go:def.bzl", go_binary_rule =3D "go_binary")
+
+"""
+go_binary overrides go_binary from rules_go and provides default
+gc_linkopts values that are needed to compile for macos target.
+To use it, add this map_kind gazelle directive to your BUILD.bazel files
+where target binary needs to be compiled with zig toolchain.
+
+Example: if this toolchain is registered as bazel-zig-cc in your WORKSPACE, =
add this to
+your root BUILD file
+# gazelle:map_kind go_binary go_binary @bazel-zig-cc//rules:go_binary_overri=
de.bzl
+"""
+def go_binary(**args):
+ new_args =3D {}
+ new_args["gc_linkopts"] =3D select({
+ "@platforms//os:macos": [
+ "-s",
+ "-w",
+ "-buildmode=3Dpie",
+ ],
+ "//conditions:default": [],
+ })
+ for k, v in args.items():
+ new_args[k] =3D v
+ go_binary_rule(**new_args)
+
diff --git a/test/BUILD b/test/BUILD
index 133fe5a..415b9c2 100644
--- a/test/BUILD
+++ b/test/BUILD
@@ -1,4 +1,5 @@
-load("@io_bazel_rules_go//go:def.bzl", "go_binary", "go_library")
+load("//rules:go_binary_override.bzl", "go_binary")
+load("@io_bazel_rules_go//go:def.bzl", "go_library")
=20
go_library(
name =3D "hello_lib",
@@ -7,22 +8,14 @@ go_library(
importpath =3D "github.com/motiejus/bazel-zig-cc/test",
visibility =3D ["//visibility:private"],
deps =3D [
- "@com_github_datadog_zstd//:go_default_library",
- "@com_github_mattn_go_sqlite3//:go_default_library",
+ "@com_github_datadog_zstd//:zstd",
+ "@com_github_mattn_go_sqlite3//:go-sqlite3",
],
)
=20
go_binary(
name =3D "hello",
embed =3D [":hello_lib"],
- gc_linkopts =3D select({
- "@platforms//os:macos": [
- "-s",
- "-w",
- "-buildmode=3Dpie",
- ],
- "//conditions:default": [],
- }),
static =3D "on",
visibility =3D ["//visibility:public"],
)
--=20
2.32.0
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Date: Fri, 5 Nov 2021 19:51:54 +0200
From: Motiejus =?utf-8?Q?Jak=C5=A1tys?= <motiejus@jakstys.lt>
To: ~mjonaitis <mjonaitis@uber.com>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht
Subject: Re: [PATCH bazel-zig-cc v2] add go_binary override
Message-ID: <20211105175154.bzfuu666zuaxyt27@mtpad.i.jakstys.lt>
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On Thu, Nov 04, 2021 at 06:54:42PM +0200, ~mjonaitis wrote:
> From: Mantas Jonaitis <mjonaitis@uber.com>
>
> ---
> BUILD | 2 ++
> README.md | 7 +++++++
> rules/BUILD | 0
> rules/go_binary_override.bzl | 26 ++++++++++++++++++++++++++
> test/BUILD | 15 ++++-----------
> 5 files changed, 39 insertions(+), 11 deletions(-)
> create mode 100644 rules/BUILD
> create mode 100644 rules/go_binary_override.bzl
Applied[1], thank you. Although I left only the acknowledgement in the
README; see [2] for why.
Motiejus
[1]: https://git.sr.ht/~motiejus/bazel-zig-cc/commit/523943bd35d33f96f946be653311787426149135
[2]: https://git.sr.ht/~motiejus/bazel-zig-cc/commit/22b5d3e8e38e762a35adbfd4e13bfe5c2fb07972
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To: Thomas Way <tway@cloudflare.com>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht
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On Mon, Dec 06, 2021 at 05:57:46PM +0000, Thomas Way wrote:
> Hey Motiejus!
> Thank you so much for your work on the Zig CC rules. They're been
> extremely helpful and a true gamechanger for the way we work with our
> repository.
> Per Zig's cache race conditions, we've made some changes to the rules and
> were wondering what the best way to contribute them would be?
Hi Thomas!
See [1]; I also recommend you to subscribe. I haven't heard of anyone
using bazel-zig-cc, so I guess I'll need to be more careful/upfront
about breaking changes.
> A quick summary:
> - Use an alias for the Go-style toolchain. This should be more efficient.
> - Some general cleanup of unused features (i.e unnecessary filegroups).
> - Most importantly: Use a cache location inside Bazel. We found that
> sometimes Zig's cache would become corrupt on the host and would become
> irrecoverable even after running `bazel clean --expunge`. Using a cache
> location inside Bazel fixes this issue and is good practise in general I
> believe.
These sound great, send them over!
> I look forward to hearing from you.
Have you found a need/way to specify a different default url for the zig
bundle? I've been playing with it[2], but unsatisfied with the API so
far.
Motiejus
[1]: https://sr.ht/~motiejus/bazel-zig-cc/#contribution-guidelines
[2]:
https://git.sr.ht/~motiejus/bazel-zig-cc/commit/8f5f249227aa6a9d3de441058eb9d3aae330620b
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To: ~motiejus/bazel-zig-cc@lists.sr.ht
Subject: recent changes in bazel-zig-cc
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Hi bazel-zig-cc users,
Due to a recent bug-fixing spree in zig, bazel-zig-cc improved quite a
bit:
- `zig c++` no longer errs with the dreaded FileNotFound[1]. This was
very prominent on many-core machines, and now unblocked larger-scale
tests.
- can compile Darwin again: x86_64[2] and aarch64[3]. Although if you
are interested in compiling for Darwin, Jakub's comments in [3] are
must-read.
My only short-term wish-list from Zig today is [4]: if Foundation
framework is requested, but zig doesn't find it, the compiler should
fail. Currently only a warning is emitted, and the binary is wedged with
a possibly "difficult to track runtime exception"[5]:
```
warning(link): framework not found for '-framework CoreFoundation'
warning(link): Framework search paths:
```
I added an Upcoming Wishlist category to the README[6], which is:
- Move Zig cache path to bazel root, so bazel clean --expunge clears the
zig cache.
- Provide a way to specify alternative URLs for the zig toolchain
(currently zig is downloaded from jakstys.lt, which is nuts).
- Rename @zig_sdk//:<toolchain>_toolchain to
@zig_sdk//toolchain:<toolchain> or similar; so the user-facing targets
are in their own namespace.
- Provide a way to specify sysroot for Darwin (OSX). See [#Compiling OS X
executables] for an ongoing discussion.
As bazel-zig-cc is only ~10% of my $dayjob, I am not planning to work on
the above any time soon. But it gives a nice starting point for a
question "how do I help/contribute"?
Zig 0.9.0 is 10 days away, I will cut bazel-zig-cc 0.4.0 once that
happens.
[1]: https://github.com/ziglang/zig/issues/9431
[2]: https://github.com/ziglang/zig/issues/10297
[3]: https://github.com/ziglang/zig/issues/10299
[4]: https://github.com/ziglang/zig/issues/10299#issuecomment-990404953
[5]: https://github.com/ziglang/zig/issues/10299#issuecomment-989153750
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From: Motiejus =?utf-8?Q?Jak=C5=A1tys?= <motiejus@jakstys.lt>
To: ~motiejus/bazel-zig-cc@lists.sr.ht
Subject: bazel-zig-cc v0.4.0-rc1
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Hi folks,
I released v0.4.0-rc1; notable changes from v0.3.4:
- upgrade to zig 0.9.0-dev.1950+a76910b69. Now compilation on Darwin
will fail if `-framework` was specified, but wasn't able to be
linked[1]. This happens on darwin/arm64, which I had to disable CI
for. A patch that passes `zig cc --sysroot=/path/to/sdk` is sought
for, if you care about darwin/arm64 (or darwin in general).
- remove default `-O3`[2]. This now re-enables UBSAN by default, which
is an important default in upstream[3].
v0.4.0 will be released when zig 0.9.0 is released, which is scheduled
for Dec 20.
About undefined behavior (removal of `-O3`)
-------------------------------------------
The second change broke my use of brotli, which relies on undefined
behaior[4]. This is my ugly way to mitigate it:
Project's WORKSPACE
```
BROTLI_COMMIT = "4ec67035c0d97c270c1c73038cc66fc5fcdfc120"
http_archive(
name = "brotli",
sha256 = "9f57c32e5903768a03900366d8a055d49c01ecbbded046dce47eae24115b58b8",
strip_prefix = "brotli-%s" % BROTLI_COMMIT,
urls = ["https://github.com/google/brotli/archive/%s.zip" % BROTLI_COMMIT],
patch_args = ["-p1"],
patches = [
"//patches:brotli-disable-undefined-behavior.patch",
],
)
```
And the patch:
```
diff --git a/BUILD b/BUILD
index 07a6793..2b4d1c1 100644
--- a/BUILD
+++ b/BUILD
@@ -43,7 +43,7 @@ config_setting(
create_msvc_config()
-STRICT_C_OPTIONS = select({
+STRICT_C_OPTIONS = ["-DBROTLI_BUILD_PORTABLE"] + select({
":msvc": [],
"//conditions:default": [
"--pedantic-errors",
```
If anyone has a better idea how to append a COPT to a downstream Bazel
project, I would be happy to learn from you.
Motiejus
[1]: https://github.com/ziglang/zig/pull/10312/
[2]: https://git.sr.ht/~motiejus/bazel-zig-cc/commit/985e26b474fb7594bb385ce9382def7c95373ca9
[3]: https://github.com/ziglang/zig/issues/4830#issuecomment-605491606
[4]: https://github.com/google/brotli/blob/ce222e317e36aa362e83fc50c7a6226d238e03fd/CMakeLists.txt#L104-L108
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To: ~motiejus/bazel-zig-cc@lists.sr.ht
Subject: bazel-zig-cc v0.4.0-rc2
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Hi folks,
I released v0.4.0-rc2, this time only upgrading zig to
0.9.0-dev.1968+ff93486d0 (from 1950). Two notable changes with regards
to `zig cc`:
- [darwin] zig cc will now fail hard if `-framework` is specified, but
not found. It used to produce a strange-looking, likely-unworkable
binary.
- glibc stubs are fixed[2]. I have been waiting for this for a long
time. More on this in HN[3].
These resolve the last known high-severity issues. Thanks zig team! As I
am not expecting any final-day fixes in zig itself, there likely won't
be an rc3. A few weeks after 0.9.0 is released, I am planning to remove
the dev versions from my mirror[4].
Tip of the day
--------------
This is helpful in `.bazelrc`:
build --compilation_mode=opt
This makes non-tests to be compiled with -O2. Tests will be compiled
without optimizations, making compilation faster, and retaining
UBSAN[5].
Open questions
--------------
The question from last week[6] still holds: how to adjust CFLAGS for an
external Bazel project?
Motiejus
[1]: https://github.com/ziglang/zig/pull/10312
[2]: https://github.com/ziglang/zig/pull/10330
[3]: https://news.ycombinator.com/item?id=29538264
[4]: https://dl.jakstys.lt/zig/
[5]: https://github.com/ziglang/zig/issues/4830#issuecomment-605491606
[6]: https://lists.sr.ht/~motiejus/bazel-zig-cc/%3C20211213023816.obgjrpaxt445lzpn%40mtpad.i.jakstys.lt%3E
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From: Motiejus =?utf-8?Q?Jak=C5=A1tys?= <motiejus@jakstys.lt>
To: ~motiejus/bazel-zig-cc@lists.sr.ht
Subject: upcoming bazel-zig-cc 0.4.0
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Hi folks,
I cannot yet release bazel-zig-cc 0.4.0, because there is a regression
in `zig c++`; you may follow along here[1].
I am happy bazel-zig-cc CI caught this[2]; this regression was quite
easy to trigger.
I accidentally pushed 0.4.0 a few days ago, but promptly deleted the
tag. If you managed to catch 0.4.0 (it was there for <1 hour), please
remove the tag. My mistake, I will try harder not to do this again.
Note that this affects only glibc targets; I am successfully using zig
0.9.0 with a musl target (0.4.0-rc2 with a custom zig version).
Regards,
Motiejus
[1]: https://github.com/ziglang/zig/issues/10386
[2]: https://builds.sr.ht/~motiejus/job/654617
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From: Joe Schafer <joesmoe10@gmail.com>
Date: Tue, 4 Jan 2022 09:16:33 -0800
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Subject: uname -m on M1 MacBook returns arm64
To: ~motiejus/bazel-zig-cc@lists.sr.ht
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Hello,
I'm a big fan of this project. It's *lot* easier than trying to figure
out other Bazel CC toolchains.
One of my teammates ran into a curious error on an M1 Macbook using
the latest bazel-zig-cc.
cc/toolchain/defs.bzl", line 219, column 70, in _zig_repository_impl
zig_include_root =
repository_ctx.attr.host_platform_include_root[host_platform]
Error: key "macos-arm64" not found in dictionary
I traced this to toolchain/defs.bzl [1] which uses `uname -m` to get
the architecture. It looks like bazel-zig-cc only supports aarch64 but
M1 Macs return arm64.
What's really spooky is that bazel-zig-cc worked on my M1 mac but it
didn't work for two other devs on my team also on M1 macs; they got
the above error.
I was able to work around the problem with the following steps:
https://gist.github.com/jschaf/c9be10d806020087680310e49f6e2072.
- Uploaded all zig SDKs to my own hosting. I had to use my own hosting
to create macos-arm64 which is really just a copy of maco-aarch64 but
I had to change the folder name to match the archive name.
- Added "macos-arm64" to host_platform_include_root, similar to "macos-aarch64".
I'm by no means a Bazel toolchain expert, but I would have thought
there's a better way to get the host platform architecture than by
shelling out to uname. Appears that there's not [2] but that answer is
from 2017. Maybe platforms provide a way out [3]?
[1]: https://git.sr.ht/~motiejus/bazel-zig-cc/tree/main/item/toolchain/defs.bzl#L210
[2]: https://stackoverflow.com/a/45029999/30900
[3]: https://github.com/bazelbuild/rules_go/blob/master/go/private/go_toolchain.bzl#L95
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Date: Tue, 4 Jan 2022 20:01:42 +0100
From: Motiejus =?utf-8?Q?Jak=C5=A1tys?= <motiejus@jakstys.lt>
To: Joe Schafer <joesmoe10@gmail.com>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht
Subject: Re: uname -m on M1 MacBook returns arm64
Message-ID: <20220104190142.gwu27ru3iprhkyr2@mtpad.i.jakstys.lt>
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On Tue, Jan 04, 2022 at 09:16:33AM -0800, Joe Schafer wrote:
> Hello,
>
> I'm a big fan of this project. It's *lot* easier than trying to figure
> out other Bazel CC toolchains.
>
> One of my teammates ran into a curious error on an M1 Macbook using
> the latest bazel-zig-cc.
>
> cc/toolchain/defs.bzl", line 219, column 70, in _zig_repository_impl
> zig_include_root =
> repository_ctx.attr.host_platform_include_root[host_platform]
> Error: key "macos-arm64" not found in dictionary
>
> I traced this to toolchain/defs.bzl [1] which uses `uname -m` to get
> the architecture. It looks like bazel-zig-cc only supports aarch64 but
> M1 Macs return arm64.
>
> What's really spooky is that bazel-zig-cc worked on my M1 mac but it
> didn't work for two other devs on my team also on M1 macs; they got
> the above error.
Hi, Joe,
that's interesting indeed. I don't have an M1 mac, nor know anyone
with M1 mac, to test this "more closely".
> I was able to work around the problem with the following steps:
> https://gist.github.com/jschaf/c9be10d806020087680310e49f6e2072.
>
> - Uploaded all zig SDKs to my own hosting. I had to use my own hosting
> to create macos-arm64 which is really just a copy of maco-aarch64 but
> I had to change the folder name to match the archive name.
>
> - Added "macos-arm64" to host_platform_include_root, similar to "macos-aarch64".
>
> I'm by no means a Bazel toolchain expert, but I would have thought
> there's a better way to get the host platform architecture than by
> shelling out to uname. Appears that there's not [2] but that answer is
> from 2017. Maybe platforms provide a way out [3]?
Re [3]: looks like `declare_toolchains` is an external function, and it
accepts `host` as a parameter, which should be set by the caller? If so,
I am not following how that would help.
If you can dig in for more information why `uname -m` returns arm64 vs
aarch64 (OSX minor version? something else?). If there is no other way
out, I would be OK to for an internal workaround to map darwin/arm64 to
darwin/aarch64 during download, provided it's the only problem
Is downloading the toolchain the only problem? Once you add that
workaround, does it keep working as one would expect?
Motiejus
> [1]: https://git.sr.ht/~motiejus/bazel-zig-cc/tree/main/item/toolchain/defs.bzl#L210
> [2]: https://stackoverflow.com/a/45029999/30900
> [3]: https://github.com/bazelbuild/rules_go/blob/master/go/private/go_toolchain.bzl#L95
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From: Joe Schafer <joesmoe10@gmail.com>
Date: Thu, 6 Jan 2022 14:43:28 -0800
Message-ID: <CAOGO9Cr=foMi5dX8m_ygVxeX_YVMRU1D=Ex7mTxL9ew_VBpYQA@mail.gmail.com>
Subject: Re: uname -m on M1 MacBook returns arm64
To: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
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> If you can dig in for more information why `uname -m` returns arm64 vs
aarch64 (OSX minor version? something else?)
I think I figured it out. It depends on whether the Bazel binary is an amd6=
4
or arm64 binary. I installed the amd64 version Bazel first on my team befor=
e
arm64 was available. macOS runs the amd64 binary and propagates the
architecture down the call chain, including the subshell to uname. I can
confirm by running uname under x86_64 emulation with:
arch -x86_64 uname -m
x86_64
So I think this package will not work for an M1 mac running an arm64 versio=
n
of Bazel. I think an internal translation from arm64 to aarch64 is likely t=
he
easiest approach.
> Is downloading the toolchain the only problem? Once you add that
workaround, does it keep working as one would expect?
Yep, as long as both the host_platform_sha256 and
host_platform_include_root dictionaries account for arm64.
On Tue, Jan 4, 2022 at 11:01 AM Motiejus Jak=C5=A1tys <motiejus@jakstys.lt>=
wrote:
>
> On Tue, Jan 04, 2022 at 09:16:33AM -0800, Joe Schafer wrote:
> > Hello,
> >
> > I'm a big fan of this project. It's *lot* easier than trying to figure
> > out other Bazel CC toolchains.
> >
> > One of my teammates ran into a curious error on an M1 Macbook using
> > the latest bazel-zig-cc.
> >
> > cc/toolchain/defs.bzl", line 219, column 70, in _zig_repository_imp=
l
> > zig_include_root =3D
> > repository_ctx.attr.host_platform_include_root[host_platform]
> > Error: key "macos-arm64" not found in dictionary
> >
> > I traced this to toolchain/defs.bzl [1] which uses `uname -m` to get
> > the architecture. It looks like bazel-zig-cc only supports aarch64 but
> > M1 Macs return arm64.
> >
> > What's really spooky is that bazel-zig-cc worked on my M1 mac but it
> > didn't work for two other devs on my team also on M1 macs; they got
> > the above error.
>
> Hi, Joe,
>
> that's interesting indeed. I don't have an M1 mac, nor know anyone
> with M1 mac, to test this "more closely".
>
> > I was able to work around the problem with the following steps:
> > https://gist.github.com/jschaf/c9be10d806020087680310e49f6e2072.
> >
> > - Uploaded all zig SDKs to my own hosting. I had to use my own hosting
> > to create macos-arm64 which is really just a copy of maco-aarch64 but
> > I had to change the folder name to match the archive name.
> >
> > - Added "macos-arm64" to host_platform_include_root, similar to "macos-=
aarch64".
> >
> > I'm by no means a Bazel toolchain expert, but I would have thought
> > there's a better way to get the host platform architecture than by
> > shelling out to uname. Appears that there's not [2] but that answer is
> > from 2017. Maybe platforms provide a way out [3]?
>
> Re [3]: looks like `declare_toolchains` is an external function, and it
> accepts `host` as a parameter, which should be set by the caller? If so,
> I am not following how that would help.
>
> If you can dig in for more information why `uname -m` returns arm64 vs
> aarch64 (OSX minor version? something else?). If there is no other way
> out, I would be OK to for an internal workaround to map darwin/arm64 to
> darwin/aarch64 during download, provided it's the only problem
>
> Is downloading the toolchain the only problem? Once you add that
> workaround, does it keep working as one would expect?
>
> Motiejus
>
> > [1]: https://git.sr.ht/~motiejus/bazel-zig-cc/tree/main/item/toolchain/=
defs.bzl#L210
> > [2]: https://stackoverflow.com/a/45029999/30900
> > [3]: https://github.com/bazelbuild/rules_go/blob/master/go/private/go_t=
oolchain.bzl#L95
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From: Motiejus =?utf-8?Q?Jak=C5=A1tys?= <motiejus@jakstys.lt>
To: Joe Schafer <joesmoe10@gmail.com>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht
Subject: Re: uname -m on M1 MacBook returns arm64
Message-ID: <20220107191043.5tl2jcliuh4ehp74@mtpad.i.jakstys.lt>
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On Thu, Jan 06, 2022 at 02:43:28PM -0800, Joe Schafer wrote:
> > If you can dig in for more information why `uname -m` returns arm64 vs
> aarch64 (OSX minor version? something else?)
>
> I think I figured it out. It depends on whether the Bazel binary is an amd64
> or arm64 binary. I installed the amd64 version Bazel first on my team before
> arm64 was available. macOS runs the amd64 binary and propagates the
> architecture down the call chain, including the subshell to uname. I can
> confirm by running uname under x86_64 emulation with:
>
> arch -x86_64 uname -m
> x86_64
>
> So I think this package will not work for an M1 mac running an arm64 version
> of Bazel. I think an internal translation from arm64 to aarch64 is likely the
> easiest approach.
>
> > Is downloading the toolchain the only problem? Once you add that
> workaround, does it keep working as one would expect?
>
> Yep, as long as both the host_platform_sha256 and
> host_platform_include_root dictionaries account for arm64.
Hi Joe, thanks for clarifying!
In that case, I will accept a patch that rewrites the architecture for
OSX from arm64 to aarch64. Please don't extend the dict though, as it
will be duplicate information and thus harder to maintain. Something
along the lines:
arch = `uname -m`
# two sentence explanation (an extract from your email would suffice)
if macos and arch == "arm64"
arch = "aarch64"
... keep going with the `arch` variable.
See https://sr.ht/~motiejus/bazel-zig-cc/#questions-amp-contributions
for how to send the patch. Thanks for your report!
Motiejus
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From: Motiejus =?utf-8?Q?Jak=C5=A1tys?= <motiejus@jakstys.lt>
To: ~motiejus/bazel-zig-cc@lists.sr.ht
Subject: bazel-zig-cc v0.4.0
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Hi all,
I just released bazel-zig-cc v0.4.0. It is the first release after zig
0.9.0 came out. I didn't cut a release with 0.9.0 due to[1]. Many thanks
Xavier for addressing that one!
This version has no known upstream issues, and, as usual, a few ones[2]
I will be accepting patches to, or will get to myself at some point.
Happy hacking,
Motiejus
[1]: https://github.com/ziglang/zig/issues/10386
[2]: https://git.sr.ht/~motiejus/bazel-zig-cc#known-issues-in-bazel-zig-cc
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From: Motiejus =?utf-8?Q?Jak=C5=A1tys?= <motiejus@jakstys.lt>
To: ~motiejus/bazel-zig-cc@lists.sr.ht
Subject: bazel-zig-cc v0.4.1 and envoy PoC
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Hi all,
I cut bazel-zig-cc v0.4.1, which upgrades zig to
0.10.0-dev.399+366c76744. Notably, it implements the following linker
args:
* --whole-archive, -whole-archive
* --no-whole-archive, -no-whole-archive
* -s, --strip-all
* -S, --strip-debug
... which were surfaced by Envoy trying out bazel-zig-cc[1].
I also renewed my gpg key (just updated the expiry date, keys are
unchanged), which you can find in today [2]. For some inexplicable
reason I keep signing my releases.
Regards,
Motiejus
[1]: https://github.com/envoyproxy/envoy/issues/19535
[2]: https://jakstys.lt/mtpad/gpg.txt
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From: Motiejus =?utf-8?Q?Jak=C5=A1tys?= <motiejus@jakstys.lt>
To: ~motiejus/bazel-zig-cc@lists.sr.ht
Subject: bazel-zig-cc v0.4.2
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Hi all,
I cut bazel-zig-cc v0.4.2, which upgrades zig to
0.10.0-dev.430+35423b005. Notable changes:
- fix linux kernel's aarch64 include paths, use stable kernel for
headers[1].
- implement --hash-style linker parameter[2].
I am working on aarch64 at my dayjob, which resulted in (1). The latter
was surfaced in envoy's ongoing investigation into zig-cc and
bazel-zig-cc[3].
Motiejus
[1]: https://github.com/ziglang/zig/pull/10699
[2]: https://github.com/ziglang/zig/commit/40c9ce2caf8f
[3]: https://github.com/envoyproxy/envoy/issues/19535
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From: Motiejus =?utf-8?Q?Jak=C5=A1tys?= <motiejus@jakstys.lt>
To: ~motiejus/bazel-zig-cc@lists.sr.ht
Subject: bazel-zig-cc v0.4.3
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Hi all,
I released v0.4.3. It only zig, which fixes[1] `--hash-style` and
`--whole-archive`. The README was also updated following some users'
questions[2]. "The starlark" remains the same.
At some point I will not be releasing new versions of bazel-zig-cc when
*only* zig is updated; at that point, you will need to download zig
provide it to bazel-zig-cc. Something akin to [3].
Motiejus
[1]:
https://github.com/envoyproxy/envoy/issues/19535#issuecomment-1024533163
[2]:
https://github.com/envoyproxy/envoy/issues/19535#issuecomment-1026111822
[3]: https://github.com/grailbio/bazel-toolchain#quickstart
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From: Motiejus =?utf-8?Q?Jak=C5=A1tys?= <motiejus@jakstys.lt>
To: ~motiejus/bazel-zig-cc@lists.sr.ht
Subject: bazel test under qemu-aarch64: help needed
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Hi folks,
I spent a good day trying to figure this out, I need help enabling tests
for aarch64.
Goal: run `bazel test //test/...` for 2 architectures: amd64 and arm64.
Arm64 would be executed under qemu-aarch64.
This works on my laptop (amd64/buster):
git clone https://git.sr.ht/~motiejus/bazel-zig-cc -b qemu
cd bazel-zig-cc; direnv allow .
bazel test --run_under=qemu-aarch64 \
--platforms @zig_sdk//:linux_arm64_platform \
--extra_toolchains @zig_sdk//:linux_arm64_musl_toolchain \
//test/go:go_test
Fails[1] on builds.sr.ht, which is also buster/amd64.
2022/02/04 09:21:03 fork/exec /home/<...>/go_test: exec format error
However, when executed directly via qemu-aarch64 on the given CI
machine, it works:
build@build:~/bazel-zig-cc$ qemu-aarch64 /<...>/go_test
PASS
build@build:~/bazel-zig-cc$
strace, investigating the bazel's sandboxing (I suspected this may be
caused by linux-sandbox-pid1.cc) didn't reveal anything. Any pointers?
Thanks,
Motiejus
[1]: https://builds.sr.ht/~motiejus/job/687819
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From: Motiejus =?utf-8?Q?Jak=C5=A1tys?= <motiejus@jakstys.lt>
To: ~motiejus/bazel-zig-cc@lists.sr.ht
Subject: Re: bazel test under qemu-aarch64: help needed
Message-ID: <20220205045529.c4quz7koyncgfqiz@mtpad.i.jakstys.lt>
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On Fri, Feb 04, 2022 at 01:55:57PM +0200, Motiejus Jakštys wrote:
> Hi folks,
>
> I spent a good day trying to figure this out, I need help enabling tests
> for aarch64.
Hi all,
Piotr Sikora replied out-of-band[1]. Two things needed to be changed:
1. Install binfmt-support. That registers qemu handlers to binfmt.
2. use qemu-aarch64-static instead of the shared version.
... and now we run all unit tests on both amd64 and arm64, and the test
runner[2] is less ugly.
Motiejus
[1]:
https://github.com/PiotrSikora/bazel-zig-cc/commit/10101bf7f11ff404e66f582bbb64a3a875f8e45f#commitcomment-66048081
[2]: https://git.sr.ht/~motiejus/bazel-zig-cc/tree/main/item/ci/test
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From: Motiejus =?utf-8?Q?Jak=C5=A1tys?= <motiejus@jakstys.lt>
To: ~motiejus/bazel-zig-cc@lists.sr.ht
Subject: bazel-zig-cc v0.4.4 and upcoming zig 0.9.1
Message-ID: <20220205050628.3m6ewpkxnvqngcqw@mtpad.i.jakstys.lt>
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Hi all,
bazel-zig-cc v0.4.4 is out. Major changes:
- register "bazel platforms" @zig_sdk//:<os>_<arch>_platform. Example
`--platform @zig_sdk//:linux_amd64_platform`. Note that this is in the
wrong place[1] and is likely to be changed.
- Tests are now executed[2] with `bazel test //test/...` on amd64
(natively) and arm64 (via qemu-aarch64-static). You are enocouraged to
add your own tests if you would like me to catch issues for you before
bumping zig-cc.
- I did NOT upgrade zig, it's the same as in v0.4.3.
Zig's maintainer Andrew asked me to test the 0.9.x release branch before
he does a zig 0.9.1 release. So if you care for zig not breaking
something before the release, but that doesn't really fit into zig's
test suite, a test in test/ may be a good place.
Motiejus
[1]: https://git.sr.ht/~motiejus/bazel-zig-cc/tree/v0.4.4/item/README.md#toolchain-and-platform-target-locations
[2]: https://git.sr.ht/~motiejus/bazel-zig-cc/tree/v0.4.4/item/ci/test
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From: ~kmicklas <kmicklas@git.sr.ht>
Date: Thu, 10 Feb 2022 23:32:57 +0000
Subject: [PATCH bazel-zig-cc 0/3] Support ARM64 Mac
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With this I'm able to build a simple `cc_library` target on an M1.
Ken Micklas (3):
Fix darwin arm64 case in .envrc for loading bazel
Interpret arm64 output from uname as aarch64 on mac OS
Fix and adjust darwin libc header paths depending on CPU
.envrc | 2 +-
toolchain/defs.bzl | 21 +++++++++++++--------
2 files changed, 14 insertions(+), 9 deletions(-)
--
2.32.0
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From: ~kmicklas <kmicklas@git.sr.ht>
Date: Thu, 10 Feb 2022 18:20:56 -0500
Subject:
[PATCH bazel-zig-cc 1/3] Fix darwin arm64 case in .envrc for loading bazel
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From: Ken Micklas <kmicklas@uber.com>
---
.envrc | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/.envrc b/.envrc
index 802d197..2b1d835 100644
--- a/.envrc
+++ b/.envrc
@@ -17,7 +17,7 @@ case "$(uname | tr A-Z a-z)-$(uname -m)" in
bzl=3D$(direnv fetchurl "${_u}linux-arm64" sha256-wd5oYN1PjV4uwnAJe9=
RtaiEblxoLizhVl4S9BR6pUKE=3D);;
darwin-x86_64)
bzl=3D$(direnv fetchurl "${_u}darwin-amd64" sha256-5IW7+EUy0CpgsOsjx=
wJhC1QI3zoZkIek8rXgmVu/LVo=3D);;
- darwin-aarch64)
+ darwin-arm64)
bzl=3D$(direnv fetchurl "${_u}darwin-arm64" sha256-wi1IYBRm2dOwQ8zXQ=
FHy9CMPm59FCfCXAXyXMDqojRM=3D);;
*)
>&2 echo "unsupported architecture tuple $(uname | tr A-Z a-z)-$(una=
me -m)"
--=20
2.32.0
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From: ~kmicklas <kmicklas@git.sr.ht>
Date: Thu, 10 Feb 2022 18:22:37 -0500
Subject: [PATCH bazel-zig-cc 2/3] Interpret arm64 output from uname as aarch64
on mac OS
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From: Ken Micklas <kmicklas@uber.com>
---
toolchain/defs.bzl | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/toolchain/defs.bzl b/toolchain/defs.bzl
index 693e2da..2b572d3 100644
--- a/toolchain/defs.bzl
+++ b/toolchain/defs.bzl
@@ -222,12 +222,15 @@ def _zig_repository_impl(repository_ctx):
res =3D repository_ctx.execute(["uname", "-m"])
if res.return_code !=3D 0:
fail("failed to run uname -m")
- uname =3D res.stdout.strip()
+ arch =3D res.stdout.strip()
=20
+ os =3D "linux"
if repository_ctx.os.name.lower().startswith("mac os"):
- host_platform =3D "macos-{}".format(uname)
- else:
- host_platform =3D "linux-{}".format(uname)
+ os =3D "macos"
+ if arch =3D=3D "arm64":
+ # uname -m reports arm64 on an M1 Mac.
+ arch =3D "aarch64"
+ host_platform =3D "{}-{}".format(os, arch)
=20
zig_include_root =3D repository_ctx.attr.host_platform_include_root[host=
_platform]
zig_sha256 =3D repository_ctx.attr.host_platform_sha256[host_platform]
--=20
2.32.0
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From: ~kmicklas <kmicklas@git.sr.ht>
Date: Thu, 10 Feb 2022 18:24:21 -0500
Subject: [PATCH bazel-zig-cc 3/3] Fix and adjust darwin libc header paths
depending on CPU
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From: Ken Micklas <kmicklas@uber.com>
---
toolchain/defs.bzl | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/toolchain/defs.bzl b/toolchain/defs.bzl
index 2b572d3..8ed93c7 100644
--- a/toolchain/defs.bzl
+++ b/toolchain/defs.bzl
@@ -54,15 +54,17 @@ _GLIBCS = [
]
def _target_darwin(gocpu, zigcpu):
+ min_os = "10"
+ if zigcpu == "aarch64":
+ min_os = "11"
return struct(
gotarget = "darwin_{}".format(gocpu),
zigtarget = "{}-macos-gnu".format(zigcpu),
includes = [
"libunwind/include",
- # FIXME: add macos.10, macos.11 and macos.12 targets,
- # and adjust the includes
- "libc/include/{}-macos.10-gnu".format(zigcpu),
- "libc/include/{}-macos-any".format(zigcpu),
+ # TODO: Define a toolchain for each minimum OS version
+ "libc/include/{}-macos.{}-gnu".format(zigcpu, min_os),
+ "libc/include/any-macos.{}-any".format(min_os),
"libc/include/any-macos-any",
],
linkopts = [],
--
2.32.0
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bazel-zig-cc/patches/.build.yml: SUCCESS in 12m57s
[Support ARM64 Mac][0] from [~kmicklas][1]
[0]: https://lists.sr.ht/~motiejus/bazel-zig-cc/patches/29276
[1]: mailto:accounts@kmicklas.com
=E2=9C=93 #693103 SUCCESS bazel-zig-cc/patches/.build.yml https://builds.sr=
.ht/~motiejus/job/693103
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Date: Fri, 11 Feb 2022 06:33:56 +0200
From: Motiejus =?utf-8?Q?Jak=C5=A1tys?= <motiejus@jakstys.lt>
To: ~kmicklas <accounts@kmicklas.com>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht, kmicklas@uber.com,
joesmoe10@gmail.com
Subject: Re: [PATCH bazel-zig-cc 0/3] Support ARM64 Mac
Message-ID: <20220211043356.xgchjv34q246kxa3@mtpad.i.jakstys.lt>
References: <164453597791.17553.15415322179801626658-0@git.sr.ht>
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On Thu, Feb 10, 2022 at 11:32:57PM +0000, ~kmicklas wrote:
> With this I'm able to build a simple `cc_library` target on an M1.
>
> Ken Micklas (3):
> Fix darwin arm64 case in .envrc for loading bazel
> Interpret arm64 output from uname as aarch64 on mac OS
> Fix and adjust darwin libc header paths depending on CPU
Thank you. Applied all 3 patches and tagged v0.4.5.
cc Joe, who had problems with M1 before. These are now fixed.
Motiejus
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From: ~kmicklas <kmicklas@git.sr.ht>
Date: Thu, 17 Mar 2022 20:04:29 +0000
Subject: [PATCH bazel-zig-cc 0/3] Download improvments
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This adds support for netrc and multiple download mirrors.
Ken Micklas (3):
Pull default SHA256s into constant and don't update
Support multiple URL formats
Support netrc for Zig SDK download
toolchain/defs.bzl | 66 +++++++++++++++++++++++++++++++++++-----------
1 file changed, 50 insertions(+), 16 deletions(-)
--
2.34.1
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From: ~kmicklas <kmicklas@git.sr.ht>
Date: Thu, 17 Mar 2022 15:11:17 -0400
Subject:
[PATCH bazel-zig-cc 1/3] Pull default SHA256s into constant and don't update
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From: Ken Micklas <kmicklas@uber.com>
Starlark's default argument semantics are pretty weird and likely not
what you would expect:
https://github.com/bazelbuild/starlark/blob/master/spec.md#functions
Additionally, this is just easier to read.
---
toolchain/defs.bzl | 19 +++++++++----------
1 file changed, 9 insertions(+), 10 deletions(-)
diff --git a/toolchain/defs.bzl b/toolchain/defs.bzl
index 8ed93c7..f942c5b 100644
--- a/toolchain/defs.bzl
+++ b/toolchain/defs.bzl
@@ -158,29 +158,28 @@ _URL_FORMAT_JAKSTYS =3D "https://dl.jakstys.lt/zig/zig-=
{host_platform}-{version}.t
=20
_VERSION =3D "0.10.0-dev.513+029844210"
=20
+_HOST_PLATFORM_SHA256 =3D {
+ "linux-aarch64": "fc0b929948d57d1b15aaac33db0cd136a1f79830926c9285fd3f5b=
6445f1ef95",
+ "linux-x86_64": "c6f323b02b0bcf7b18143983bf2525640dd541f39af661e963823c9=
a61a09b28",
+ "macos-aarch64": "0ccd8dad1264474ca824d45c3021b7e549b67792fa1a66cb9d4d70=
40775319bb",
+ "macos-x86_64": "3c939bebe8648c277ee66d1c600e68576e382d0309dc29eb4c32aba=
96b83f6f0",
+}
+
def register_toolchains(
register =3D [],
version =3D _VERSION,
url_format =3D _URL_FORMAT_JAKSTYS,
- host_platform_sha256 =3D {}):
+ host_platform_sha256 =3D _HOST_PLATFORM_SHA256):
"""
Download zig toolchain and register some.
@param register registers the given toolchains to the system using
native.register_toolchains(). See README for possible choices.
"""
- sha256s =3D {
- "linux-aarch64": "fc0b929948d57d1b15aaac33db0cd136a1f79830926c9285fd=
3f5b6445f1ef95",
- "linux-x86_64": "c6f323b02b0bcf7b18143983bf2525640dd541f39af661e9638=
23c9a61a09b28",
- "macos-aarch64": "0ccd8dad1264474ca824d45c3021b7e549b67792fa1a66cb9d=
4d7040775319bb",
- "macos-x86_64": "3c939bebe8648c277ee66d1c600e68576e382d0309dc29eb4c3=
2aba96b83f6f0",
- }
- sha256s.update(host_platform_sha256)
-
zig_repository(
name =3D "zig_sdk",
version =3D version,
url_format =3D url_format,
- host_platform_sha256 =3D sha256s,
+ host_platform_sha256 =3D host_platform_sha256,
host_platform_include_root =3D {
"linux-aarch64": "lib/",
"linux-x86_64": "lib/",
--=20
2.34.1
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From: ~kmicklas <kmicklas@git.sr.ht>
Date: Thu, 17 Mar 2022 15:39:41 -0400
Subject: [PATCH bazel-zig-cc 2/3] Support multiple URL formats
Message-ID: <164754746999.13783.11303815672892555536-2@git.sr.ht>
X-Mailer: git.sr.ht
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From: Ken Micklas <kmicklas@uber.com>
---
toolchain/defs.bzl | 20 +++++++++++++++-----
1 file changed, 15 insertions(+), 5 deletions(-)
diff --git a/toolchain/defs.bzl b/toolchain/defs.bzl
index f942c5b..f883cc2 100644
--- a/toolchain/defs.bzl
+++ b/toolchain/defs.bzl
@@ -168,7 +168,8 @@ _HOST_PLATFORM_SHA256 =3D {
def register_toolchains(
register =3D [],
version =3D _VERSION,
- url_format =3D _URL_FORMAT_JAKSTYS,
+ url_format =3D [_URL_FORMAT_JAKSTYS],
+ url_formats =3D [],
host_platform_sha256 =3D _HOST_PLATFORM_SHA256):
"""
Download zig toolchain and register some.
@@ -178,7 +179,8 @@ def register_toolchains(
zig_repository(
name =3D "zig_sdk",
version =3D version,
- url_format =3D url_format,
+ url_format =3D url_format if type(url_format) =3D=3D type("") else N=
one,
+ url_formats =3D url_format if type(url_format) =3D=3D type([""]) els=
e None,
host_platform_sha256 =3D host_platform_sha256,
host_platform_include_root =3D {
"linux-aarch64": "lib/",
@@ -239,10 +241,17 @@ def _zig_repository_impl(repository_ctx):
"version": repository_ctx.attr.version,
"host_platform": host_platform,
}
- zig_url =3D repository_ctx.attr.url_format.format(**format_vars)
+
+ url_format =3D repository_ctx.attr.url_format
+ url_formats =3D repository_ctx.attr.url_formats
+
+ if len(url_formats) =3D=3D 0:
+ url_formats =3D [url_format]
+ elif url_format !=3D "":
+ fail("Only one of url_format and url_formats should be specified.")
=20
repository_ctx.download_and_extract(
- url =3D zig_url,
+ url =3D [uf.format(**format_vars) for uf in url_formats],
stripPrefix =3D "zig-{host_platform}-{version}/".format(**format_var=
s),
sha256 =3D zig_sha256,
)
@@ -279,7 +288,8 @@ zig_repository =3D repository_rule(
attrs =3D {
"version": attr.string(),
"host_platform_sha256": attr.string_dict(),
- "url_format": attr.string(),
+ "url_format": attr.string(doc =3D "Deprecated in favor of url_format=
s"),
+ "url_formats": attr.string_list(),
"host_platform_include_root": attr.string_dict(),
},
implementation =3D _zig_repository_impl,
--=20
2.34.1
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From: ~kmicklas <kmicklas@git.sr.ht>
Date: Thu, 17 Mar 2022 15:47:45 -0400
Subject: [PATCH bazel-zig-cc 3/3] Support netrc for Zig SDK download
Message-ID: <164754746999.13783.11303815672892555536-3@git.sr.ht>
X-Mailer: git.sr.ht
Reply-to: ~kmicklas <git@kmicklas.com>
In-Reply-To: <164754746999.13783.11303815672892555536-0@git.sr.ht>
To: ~motiejus/bazel-zig-cc@lists.sr.ht
Cc: kmicklas@uber.com
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From: Ken Micklas <kmicklas@uber.com>
---
toolchain/defs.bzl | 29 +++++++++++++++++++++++++++--
1 file changed, 27 insertions(+), 2 deletions(-)
diff --git a/toolchain/defs.bzl b/toolchain/defs.bzl
index f883cc2..0ea7a26 100644
--- a/toolchain/defs.bzl
+++ b/toolchain/defs.bzl
@@ -1,5 +1,5 @@
load("@bazel_skylib//lib:shell.bzl", "shell")
-load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+load("@bazel_tools//tools/build_defs/repo:utils.bzl", "read_netrc", "use_net=
rc")
load(":zig_toolchain.bzl", "zig_cc_toolchain_config")
=20
DEFAULT_TOOL_PATHS =3D {
@@ -250,8 +250,11 @@ def _zig_repository_impl(repository_ctx):
elif url_format !=3D "":
fail("Only one of url_format and url_formats should be specified.")
=20
+ urls =3D [uf.format(**format_vars) for uf in url_formats]
+
repository_ctx.download_and_extract(
- url =3D [uf.format(**format_vars) for uf in url_formats],
+ auth =3D use_netrc(read_user_netrc(repository_ctx), urls, {}),
+ url =3D urls,
stripPrefix =3D "zig-{host_platform}-{version}/".format(**format_var=
s),
sha256 =3D zig_sha256,
)
@@ -407,3 +410,25 @@ def zig_build_macro(absolute_path, zig_include_root):
name =3D "{os}_{gocpu}_platform".format(os =3D os, gocpu=
=3D gocpu),
constraint_values =3D constraint_values,
)
+
+# Copied from https://github.com/bazelbuild/bazel/blob/master/tools/build_de=
fs/repo/utils.bzl
+# TODO: Upgrade to Bazel 5.1 and import this instead.
+def read_user_netrc(ctx):
+ """Read user's default netrc file.
+ Args:
+ ctx: The repository context of the repository rule calling this utilit=
y function.
+ Returns:
+ dict mapping a machine names to a dict with the information provided a=
bout them.
+ """
+ if ctx.os.name.startswith("windows"):
+ home_dir =3D ctx.os.environ.get("USERPROFILE", "")
+ else:
+ home_dir =3D ctx.os.environ.get("HOME", "")
+
+ if not home_dir:
+ return {}
+
+ netrcfile =3D "{}/.netrc".format(home_dir)
+ if not ctx.path(netrcfile).exists:
+ return {}
+ return read_netrc(ctx, netrcfile)
--=20
2.34.1
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Subject: [bazel-zig-cc/patches/.build.yml] build success
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bazel-zig-cc/patches/.build.yml: SUCCESS in 13m21s
[Download improvments][0] from [~kmicklas][1]
[0]: https://lists.sr.ht/~motiejus/bazel-zig-cc/patches/30313
[1]: mailto:git@kmicklas.com
=E2=9C=93 #717171 SUCCESS bazel-zig-cc/patches/.build.yml https://builds.sr=
.ht/~motiejus/job/717171
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Date: Fri, 18 Mar 2022 06:58:47 +0100
From: Motiejus =?utf-8?Q?Jak=C5=A1tys?= <motiejus@jakstys.lt>
To: ~motiejus/bazel-zig-cc@lists.sr.ht
Subject: bazel-zig-cc v0.5.0
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Hi all,
thanks to Ken Micklas contributions, bazel-zig-cc can now do the
following:
- support netrc authentication. You can use internal mirrors for zig
bundle now (assuming they support netrc, of course).
- provide multiple download urls for the zig toolchain via
`url_formats`. This option is now documented, among with `version` and
`sha256`.
- while at it, upgraded zig to 0.10.0-dev.1393+291f5055f. I will be
cleaning up pre-0.10.0 from dl.jakstys.lt, consider yourself warned.
Since `sha256`, `urls` and `version` are part of the "official" API, I
will not be upgrading zig in bazel-zig-cc (or, rather, will upgrade much
more rarely); please do so in your application.
Reminder: dl.jakstys.lt is a small machine in my home closet. No UPS, no
monitoring whatsoever. So, if you are depending on this for work, you
may want to use your mirror.
Happy compiling,
Motiejus
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From: ~kmicklas <kmicklas@git.sr.ht>
Date: Fri, 25 Mar 2022 15:53:45 +0000
Subject:
[PATCH bazel-zig-cc 0/4] Upgrade to Bazel 5.1.0 and associated cleanups
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Also pins the Go SDK version.
Ken Micklas (4):
Upgrade to Bazel 5.1.0
Remove repo fetch-time uname dependency, use new os.arch instead
Use upstream read_user_netrc from Bazel 5.1
Pin Go SDK to 1.18 for reproducibility
.bazelversion | 2 +-
WORKSPACE | 2 +-
toolchain/defs.bzl | 41 ++++++++---------------------------------
3 files changed, 10 insertions(+), 35 deletions(-)
--
2.34.1
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From: ~kmicklas <kmicklas@git.sr.ht>
Date: Fri, 25 Mar 2022 11:45:39 -0400
Subject: [PATCH bazel-zig-cc 1/4] Upgrade to Bazel 5.1.0
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From: Ken Micklas <kmicklas@uber.com>
---
.bazelversion | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/.bazelversion b/.bazelversion
index af8c8ec..831446c 100644
--- a/.bazelversion
+++ b/.bazelversion
@@ -1 +1 @@
-4.2.2
+5.1.0
--
2.34.1
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From: ~kmicklas <kmicklas@git.sr.ht>
Date: Fri, 25 Mar 2022 11:46:11 -0400
Subject: [PATCH bazel-zig-cc 2/4] Remove repo fetch-time uname dependency, use
new os.arch instead
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From: Ken Micklas <kmicklas@uber.com>
---
toolchain/defs.bzl | 15 ++++++---------
1 file changed, 6 insertions(+), 9 deletions(-)
diff --git a/toolchain/defs.bzl b/toolchain/defs.bzl
index 810db50..840976d 100644
--- a/toolchain/defs.bzl
+++ b/toolchain/defs.bzl
@@ -221,17 +221,14 @@ _ZIG_TOOLS =3D [
]
=20
def _zig_repository_impl(repository_ctx):
- res =3D repository_ctx.execute(["uname", "-m"])
- if res.return_code !=3D 0:
- fail("failed to run uname -m")
- arch =3D res.stdout.strip()
+ arch =3D repository_ctx.os.arch
+ if arch =3D=3D "amd64":
+ arch =3D "x86_64"
=20
- os =3D "linux"
- if repository_ctx.os.name.lower().startswith("mac os"):
+ os =3D repository_ctx.os.name.lower()
+ if os.startswith("mac os"):
os =3D "macos"
- if arch =3D=3D "arm64":
- # uname -m reports arm64 on an M1 Mac.
- arch =3D "aarch64"
+
host_platform =3D "{}-{}".format(os, arch)
=20
zig_include_root =3D repository_ctx.attr.host_platform_include_root[host=
_platform]
--=20
2.34.1
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From: ~kmicklas <kmicklas@git.sr.ht>
Date: Fri, 25 Mar 2022 11:46:59 -0400
Subject: [PATCH bazel-zig-cc 3/4] Use upstream read_user_netrc from Bazel 5.1
Message-ID: <164822362548.25319.8453123527885867890-3@git.sr.ht>
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From: Ken Micklas <kmicklas@uber.com>
---
toolchain/defs.bzl | 26 ++------------------------
1 file changed, 2 insertions(+), 24 deletions(-)
diff --git a/toolchain/defs.bzl b/toolchain/defs.bzl
index 840976d..112a64a 100644
--- a/toolchain/defs.bzl
+++ b/toolchain/defs.bzl
@@ -1,6 +1,6 @@
load("@bazel_skylib//lib:shell.bzl", "shell")
load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
-load("@bazel_tools//tools/build_defs/repo:utils.bzl", "read_netrc", "use_net=
rc")
+load("@bazel_tools//tools/build_defs/repo:utils.bzl", "read_user_netrc", "us=
e_netrc")
load(":zig_toolchain.bzl", "zig_cc_toolchain_config")
=20
DEFAULT_TOOL_PATHS =3D {
@@ -240,7 +240,7 @@ def _zig_repository_impl(repository_ctx):
=20
urls =3D [uf.format(**format_vars) for uf in repository_ctx.attr.url_for=
mats]
repository_ctx.download_and_extract(
- auth =3D use_netrc(_read_user_netrc(repository_ctx), urls, {}),
+ auth =3D use_netrc(read_user_netrc(repository_ctx), urls, {}),
url =3D urls,
stripPrefix =3D "zig-{host_platform}-{version}/".format(**format_var=
s),
sha256 =3D zig_sha256,
@@ -396,25 +396,3 @@ def zig_build_macro(absolute_path, zig_include_root):
name =3D "{os}_{gocpu}_platform".format(os =3D os, gocpu=
=3D gocpu),
constraint_values =3D constraint_values,
)
-
-# Copied from https://github.com/bazelbuild/bazel/blob/master/tools/build_de=
fs/repo/utils.bzl
-# TODO: Upgrade to Bazel 5.1 and import this instead.
-def _read_user_netrc(ctx):
- """Read user's default netrc file.
- Args:
- ctx: The repository context of the repository rule calling this utilit=
y function.
- Returns:
- dict mapping a machine names to a dict with the information provided a=
bout them.
- """
- if ctx.os.name.startswith("windows"):
- home_dir =3D ctx.os.environ.get("USERPROFILE", "")
- else:
- home_dir =3D ctx.os.environ.get("HOME", "")
-
- if not home_dir:
- return {}
-
- netrcfile =3D "{}/.netrc".format(home_dir)
- if not ctx.path(netrcfile).exists:
- return {}
- return read_netrc(ctx, netrcfile)
--=20
2.34.1
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From: ~kmicklas <kmicklas@git.sr.ht>
Date: Fri, 25 Mar 2022 11:47:10 -0400
Subject: [PATCH bazel-zig-cc 4/4] Pin Go SDK to 1.18 for reproducibility
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From: Ken Micklas <kmicklas@uber.com>
---
WORKSPACE | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/WORKSPACE b/WORKSPACE
index eeb098a..0aff5db 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -28,7 +28,7 @@ load("@bazel_gazelle//:deps.bzl", "gazelle_dependencies")
go_rules_dependencies()
# use latest stable.
-go_download_sdk(name = "go_sdk")
+go_download_sdk(name = "go_sdk", version = "1.18")
go_register_toolchains()
--
2.34.1
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bazel-zig-cc/patches/.build.yml: FAILED in 14m1s
[Upgrade to Bazel 5.1.0 and associated cleanups][0] from [~kmicklas][1]
[0]: https://lists.sr.ht/~motiejus/bazel-zig-cc/patches/30549
[1]: mailto:git@kmicklas.com
=E2=9C=97 #722785 FAILED bazel-zig-cc/patches/.build.yml https://builds.sr.=
ht/~motiejus/job/722785
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From: Motiejus =?utf-8?Q?Jak=C5=A1tys?= <motiejus@jakstys.lt>
To: ~kmicklas <git@kmicklas.com>
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Subject: Re: [PATCH bazel-zig-cc 4/4] Pin Go SDK to 1.18 for reproducibility
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On Fri, Mar 25, 2022 at 11:47:10AM -0400, ~kmicklas wrote:
> From: Ken Micklas <kmicklas@uber.com>
>
> ---
> WORKSPACE | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/WORKSPACE b/WORKSPACE
> index eeb098a..0aff5db 100644
> --- a/WORKSPACE
> +++ b/WORKSPACE
> @@ -28,7 +28,7 @@ load("@bazel_gazelle//:deps.bzl", "gazelle_dependencies")
> go_rules_dependencies()
>
> # use latest stable.
> -go_download_sdk(name = "go_sdk")
> +go_download_sdk(name = "go_sdk", version = "1.18")
I was on the edge about this myself, since that would require us to
upgrade it with every go version, even patch ones. But I guess you're
right, leaving it like this for reproducibility.
Motiejus
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Date: Sat, 26 Mar 2022 16:07:17 +0200
From: Motiejus =?utf-8?Q?Jak=C5=A1tys?= <motiejus@jakstys.lt>
To: ~kmicklas <git@kmicklas.com>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht, kmicklas@uber.com
Subject: Re: [PATCH bazel-zig-cc 0/4] Upgrade to Bazel 5.1.0 and associated
cleanups
Message-ID: <20220326140717.oep2mxniosjzzetg@mtpad.i.jakstys.lt>
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On Fri, Mar 25, 2022 at 03:53:45PM +0000, ~kmicklas wrote:
> Also pins the Go SDK version.
>
> Ken Micklas (4):
> Upgrade to Bazel 5.1.0
> Remove repo fetch-time uname dependency, use new os.arch instead
> Use upstream read_user_netrc from Bazel 5.1
> Pin Go SDK to 1.18 for reproducibility
Thanks, applied all of them (+buildifier). Do you want me to cut v0.5.1?
Motiejus
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From: ~laurynasl <laurynasl@git.sr.ht>
Date: Thu, 07 Apr 2022 09:37:52 +0000
Subject: [PATCH bazel-zig-cc 0/4] Move platforms and toolchains
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Move platform and toochains definitions into their own "namespaces".
laurynasl (4):
move platforms under @zig_cc//platform:
Move declare_platforms() to platform/
Move toolchainss under @zig_sdk//platform:
Move toolchain definitions to toolchains/
.bazelrc | 8 +-
README.md | 27 +--
ci/test | 4 +-
toolchain/BUILD.sdk.bazel | 5 +-
toolchain/defs.bzl | 244 +++-------------------------
toolchain/platform/BUILD | 3 +
toolchain/platform/defs.bzl | 17 ++
toolchain/private/BUILD | 0
toolchain/private/defs.bzl | 124 ++++++++++++++
toolchain/toolchain/BUILD | 0
toolchain/toolchain/BUILD.sdk.bazel | 10 ++
toolchain/toolchain/defs.bzl | 87 ++++++++++
12 files changed, 277 insertions(+), 252 deletions(-)
create mode 100644 toolchain/platform/BUILD
create mode 100644 toolchain/platform/defs.bzl
create mode 100644 toolchain/private/BUILD
create mode 100644 toolchain/private/defs.bzl
create mode 100644 toolchain/toolchain/BUILD
create mode 100644 toolchain/toolchain/BUILD.sdk.bazel
create mode 100644 toolchain/toolchain/defs.bzl
--
2.34.1
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From: ~laurynasl <laurynasl@git.sr.ht>
Date: Wed, 06 Apr 2022 19:16:53 +0000
Subject: [PATCH bazel-zig-cc 1/4] move platforms under @zig_cc//platform:
Message-ID: <164932427279.26543.1789507091630612744-1@git.sr.ht>
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From: laurynasl <laurynasl@uber.com>
---
README.md | 9 +++------
ci/test | 2 +-
toolchain/defs.bzl | 10 ++++++++--
toolchain/platform/BUILD | 3 +++
4 files changed, 15 insertions(+), 9 deletions(-)
create mode 100644 toolchain/platform/BUILD
diff --git a/README.md b/README.md
index 1c8e011..d855c78 100644
--- a/README.md
+++ b/README.md
@@ -114,9 +114,6 @@ The path to Bazel toolchains is `@zig_sdk//:<toolchain>_t=
oolchain`. It should
be moved to `@zig_sdk//toolchain:<toolchain>` or similar; so the user-facing
targets are in their own namespace.
=20
-Likewise, platforms are `@zig_sdk//:<platform>_platform`, and should be moved
-to `@zig_sdk//:platform:<platform>`.
-
## OSX: sysroot
=20
For non-trivial programs (and for all darwin/arm64 cgo programs) MacOS SDK m=
ay
@@ -164,7 +161,7 @@ may apply to aarch64, but the author didn't find a need t=
o test it (yet).
## build & run linux cgo + glibc
=20
```
-$ bazel build --platforms @zig_sdk//:linux_amd64_platform //test/go:go
+$ bazel build --platforms @zig_sdk//platform:linux_amd64 //test/go:go
$ file bazel-out/k8-opt-ST-d17813c235ce/bin/test/go/go_/go
bazel-out/k8-opt-ST-d17813c235ce/bin/test/go/go_/go: ELF 64-bit LSB executab=
le, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux=
-x86-64.so.2, for GNU/Linux 2.0.0, Go BuildID=3Dredacted, with debug_info, no=
t stripped
$ bazel-out/k8-opt-ST-d17813c235ce/bin/test/go/go_/go
@@ -176,7 +173,7 @@ hello, world
```
$ bazel test \
--config=3Dqemu-aarch64 \
- --platforms @zig_sdk//:linux_arm64_platform \
+ --platforms @zig_sdk//platform:linux_arm64 \
--extra_toolchains @zig_sdk//:linux_arm64_musl_toolchain //test/...
...
INFO: Build completed successfully, 10 total actions
@@ -186,7 +183,7 @@ INFO: Build completed successfully, 10 total actions
## macos cgo
=20
```
-$ bazel build --platforms @zig_sdk//:darwin_amd64_platform //test/go:go
+$ bazel build --platforms @zig_sdk//platform:darwin_amd64 //test/go:go
...
$ file bazel-out/k8-opt-ST-d17813c235ce/bin/test/go/go_/go
bazel-out/k8-opt-ST-d17813c235ce/bin/test/go/go_/go: Mach-O 64-bit x86_64 ex=
ecutable, flags:<NOUNDEFS|DYLDLINK|TWOLEVEL|PIE|HAS_TLV_DESCRIPTORS>
diff --git a/ci/test b/ci/test
index e9a8e9a..5b9a4d7 100755
--- a/ci/test
+++ b/ci/test
@@ -18,7 +18,7 @@ while read -r action platform toolchain config; do
fi
=20
args+=3D(\
- --platforms "@zig_sdk//:${platform}_platform" \
+ --platforms "@zig_sdk//platform:${platform}" \
--extra_toolchains "@zig_sdk//:${toolchain}_toolchain" \
//test/... \
)
diff --git a/toolchain/defs.bzl b/toolchain/defs.bzl
index 112a64a..eb005fe 100644
--- a/toolchain/defs.bzl
+++ b/toolchain/defs.bzl
@@ -264,6 +264,11 @@ def _zig_repository_impl(repository_ctx):
content =3D _fcntl_h,
)
=20
+ repository_ctx.symlink(
+ Label("//toolchain/platform:BUILD"),
+ "platform/BUILD",
+ )
+
repository_ctx.template(
"BUILD.bazel",
Label("//toolchain:BUILD.sdk.bazel"),
@@ -380,6 +385,7 @@ def zig_build_macro(absolute_path, zig_include_root):
toolchain_type =3D "@bazel_tools//tools/cpp:toolchain_type",
)
=20
+def declare_platforms():
# create @zig_sdk//{os}_{arch}_platform entries with zig and go conventi=
ons
for zigcpu, gocpu in (("x86_64", "amd64"), ("aarch64", "arm64")):
for bzlos, oss in {"linux": ["linux"], "macos": ["macos", "darwin"]}=
.items():
@@ -389,10 +395,10 @@ def zig_build_macro(absolute_path, zig_include_root):
"@platforms//cpu:{}".format(zigcpu),
]
native.platform(
- name =3D "{os}_{zigcpu}_platform".format(os =3D os, zigc=
pu =3D zigcpu),
+ name =3D "{os}_{zigcpu}".format(os =3D os, zigcpu =3D zi=
gcpu),
constraint_values =3D constraint_values,
)
native.platform(
- name =3D "{os}_{gocpu}_platform".format(os =3D os, gocpu=
=3D gocpu),
+ name =3D "{os}_{gocpu}".format(os =3D os, gocpu =3D gocp=
u),
constraint_values =3D constraint_values,
)
diff --git a/toolchain/platform/BUILD b/toolchain/platform/BUILD
new file mode 100644
index 0000000..b02436b
--- /dev/null
+++ b/toolchain/platform/BUILD
@@ -0,0 +1,3 @@
+load("@bazel-zig-cc//toolchain:defs.bzl", "declare_platforms")
+
+declare_platforms()
--=20
2.34.1
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From: ~laurynasl <laurynasl@git.sr.ht>
Date: Wed, 06 Apr 2022 19:19:44 +0000
Subject: [PATCH bazel-zig-cc 2/4] Move declare_platforms() to platform/
Message-ID: <164932427279.26543.1789507091630612744-2@git.sr.ht>
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From: laurynasl <laurynasl@uber.com>
---
toolchain/defs.bzl | 17 -----------------
toolchain/platform/BUILD | 2 +-
toolchain/platform/defs.bzl | 17 +++++++++++++++++
3 files changed, 18 insertions(+), 18 deletions(-)
create mode 100644 toolchain/platform/defs.bzl
diff --git a/toolchain/defs.bzl b/toolchain/defs.bzl
index eb005fe..3f6b4bd 100644
--- a/toolchain/defs.bzl
+++ b/toolchain/defs.bzl
@@ -385,20 +385,3 @@ def zig_build_macro(absolute_path, zig_include_root):
toolchain_type =3D "@bazel_tools//tools/cpp:toolchain_type",
)
=20
-def declare_platforms():
- # create @zig_sdk//{os}_{arch}_platform entries with zig and go conventi=
ons
- for zigcpu, gocpu in (("x86_64", "amd64"), ("aarch64", "arm64")):
- for bzlos, oss in {"linux": ["linux"], "macos": ["macos", "darwin"]}=
.items():
- for os in oss:
- constraint_values =3D [
- "@platforms//os:{}".format(bzlos),
- "@platforms//cpu:{}".format(zigcpu),
- ]
- native.platform(
- name =3D "{os}_{zigcpu}".format(os =3D os, zigcpu =3D zi=
gcpu),
- constraint_values =3D constraint_values,
- )
- native.platform(
- name =3D "{os}_{gocpu}".format(os =3D os, gocpu =3D gocp=
u),
- constraint_values =3D constraint_values,
- )
diff --git a/toolchain/platform/BUILD b/toolchain/platform/BUILD
index b02436b..ce0ffc7 100644
--- a/toolchain/platform/BUILD
+++ b/toolchain/platform/BUILD
@@ -1,3 +1,3 @@
-load("@bazel-zig-cc//toolchain:defs.bzl", "declare_platforms")
+load("@bazel-zig-cc//toolchain/platform:defs.bzl", "declare_platforms")
=20
declare_platforms()
diff --git a/toolchain/platform/defs.bzl b/toolchain/platform/defs.bzl
new file mode 100644
index 0000000..e094029
--- /dev/null
+++ b/toolchain/platform/defs.bzl
@@ -0,0 +1,17 @@
+def declare_platforms():
+ # create @zig_sdk//{os}_{arch}_platform entries with zig and go conventi=
ons
+ for zigcpu, gocpu in (("x86_64", "amd64"), ("aarch64", "arm64")):
+ for bzlos, oss in {"linux": ["linux"], "macos": ["macos", "darwin"]}=
.items():
+ for os in oss:
+ constraint_values =3D [
+ "@platforms//os:{}".format(bzlos),
+ "@platforms//cpu:{}".format(zigcpu),
+ ]
+ native.platform(
+ name =3D "{os}_{zigcpu}".format(os =3D os, zigcpu =3D zi=
gcpu),
+ constraint_values =3D constraint_values,
+ )
+ native.platform(
+ name =3D "{os}_{gocpu}".format(os =3D os, gocpu =3D gocp=
u),
+ constraint_values =3D constraint_values,
+ )
--=20
2.34.1
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From: ~laurynasl <laurynasl@git.sr.ht>
Date: Wed, 06 Apr 2022 19:46:15 +0000
Subject: [PATCH bazel-zig-cc 3/4] Move toolchainss under @zig_sdk//platform:
Message-ID: <164932427279.26543.1789507091630612744-3@git.sr.ht>
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From: laurynasl <laurynasl@uber.com>
---
.bazelrc | 8 ++---
README.md | 18 ++++------
ci/test | 2 +-
toolchain/BUILD.sdk.bazel | 5 ++-
toolchain/defs.bzl | 55 ++++++++++++++++++-----------
toolchain/toolchain/BUILD | 0
toolchain/toolchain/BUILD.sdk.bazel | 10 ++++++
7 files changed, 57 insertions(+), 41 deletions(-)
create mode 100644 toolchain/toolchain/BUILD
create mode 100644 toolchain/toolchain/BUILD.sdk.bazel
diff --git a/.bazelrc b/.bazelrc
index cba4a5e..fed6f0b 100644
--- a/.bazelrc
+++ b/.bazelrc
@@ -6,10 +6,10 @@ build --worker_sandboxing
build --compilation_mode=3Dopt
=20
build --incompatible_enable_cc_toolchain_resolution
-build --extra_toolchains @zig_sdk//:linux_amd64_gnu.2.19_toolchain
-build --extra_toolchains @zig_sdk//:linux_arm64_gnu.2.28_toolchain
-build --extra_toolchains @zig_sdk//:darwin_amd64_toolchain
-build --extra_toolchains @zig_sdk//:darwin_arm64_toolchain
+build --extra_toolchains @zig_sdk//toolchain:linux_amd64_gnu.2.19
+build --extra_toolchains @zig_sdk//toolchain:linux_arm64_gnu.2.28
+build --extra_toolchains @zig_sdk//toolchain:darwin_amd64
+build --extra_toolchains @zig_sdk//toolchain:darwin_arm64
=20
test:qemu-aarch64 --test_env=3DQEMU_LD_PREFIX=3D/usr/aarch64-linux-gnu/
test:qemu-aarch64 --run_under=3Dqemu-aarch64-static
diff --git a/README.md b/README.md
index d855c78..1a20d5f 100644
--- a/README.md
+++ b/README.md
@@ -41,10 +41,10 @@ And this to `.bazelrc`:
=20
```
build --incompatible_enable_cc_toolchain_resolution
-build --extra_toolchains @zig_sdk//:linux_amd64_gnu.2.19_toolchain
-build --extra_toolchains @zig_sdk//:linux_arm64_gnu.2.28_toolchain
-build --extra_toolchains @zig_sdk//:darwin_amd64_toolchain
-build --extra_toolchains @zig_sdk//:darwin_arm64_toolchain
+build --extra_toolchains @zig_sdk//toolchain:linux_amd64_gnu.2.19
+build --extra_toolchains @zig_sdk//toolchain:linux_arm64_gnu.2.28
+build --extra_toolchains @zig_sdk//toolchain:darwin_amd64
+build --extra_toolchains @zig_sdk//toolchain:darwin_arm64
```
=20
The snippets above will download the zig toolchain and register it for the
@@ -80,7 +80,7 @@ different one is registered using `--extra_toolchains <tool=
chain>` in
tests) on linux/amd64/musl, you may specify:
=20
```
---extra_toolchains @zig_sdk//:linux_amd64_musl_toolchain
+--extra_toolchains @zig_sdk//toolchain:linux_amd64_musl
```
=20
## UBSAN and "SIGILL: Illegal Instruction"
@@ -108,12 +108,6 @@ how to contribute.
Currently zig cache is in `$HOME`, so `bazel clean --expunge` does not clear
the zig cache. Zig's cache should be stored somewhere in the project's path.
=20
-## Toolchain and platform target locations
-
-The path to Bazel toolchains is `@zig_sdk//:<toolchain>_toolchain`. It should
-be moved to `@zig_sdk//toolchain:<toolchain>` or similar; so the user-facing
-targets are in their own namespace.
-
## OSX: sysroot
=20
For non-trivial programs (and for all darwin/arm64 cgo programs) MacOS SDK m=
ay
@@ -174,7 +168,7 @@ hello, world
$ bazel test \
--config=3Dqemu-aarch64 \
--platforms @zig_sdk//platform:linux_arm64 \
- --extra_toolchains @zig_sdk//:linux_arm64_musl_toolchain //test/...
+ --extra_toolchains @zig_sdk//toolchain:linux_arm64_musl //test/...
...
INFO: Build completed successfully, 10 total actions
//test/go:go_test PAS=
SED in 0.2s
diff --git a/ci/test b/ci/test
index 5b9a4d7..35d0c07 100755
--- a/ci/test
+++ b/ci/test
@@ -19,7 +19,7 @@ while read -r action platform toolchain config; do
=20
args+=3D(\
--platforms "@zig_sdk//platform:${platform}" \
- --extra_toolchains "@zig_sdk//:${toolchain}_toolchain" \
+ --extra_toolchains "@zig_sdk//toolchain:${toolchain}" \
//test/... \
)
=20
diff --git a/toolchain/BUILD.sdk.bazel b/toolchain/BUILD.sdk.bazel
index 8b5db49..cf5dc4a 100644
--- a/toolchain/BUILD.sdk.bazel
+++ b/toolchain/BUILD.sdk.bazel
@@ -1,11 +1,10 @@
-load("@bazel-zig-cc//toolchain:defs.bzl", "zig_build_macro")
+load("@bazel-zig-cc//toolchain:defs.bzl", "declare_files")
=20
package(
default_visibility =3D ["//visibility:public"],
)
=20
-zig_build_macro(
- absolute_path =3D {absolute_path},
+declare_files(
zig_include_root =3D {zig_include_root},
)
=20
diff --git a/toolchain/defs.bzl b/toolchain/defs.bzl
index 3f6b4bd..61e099f 100644
--- a/toolchain/defs.bzl
+++ b/toolchain/defs.bzl
@@ -189,7 +189,7 @@ def register_toolchains(
},
)
=20
- toolchains =3D ["@zig_sdk//:%s_toolchain" % t for t in register]
+ toolchains =3D ["@zig_sdk//:toolchain:%s" % t for t in register]
native.register_toolchains(*toolchains)
=20
ZIG_TOOL_PATH =3D "tools/{zig_tool}"
@@ -268,11 +268,19 @@ def _zig_repository_impl(repository_ctx):
Label("//toolchain/platform:BUILD"),
"platform/BUILD",
)
-
repository_ctx.template(
- "BUILD.bazel",
+ "BUILD",
Label("//toolchain:BUILD.sdk.bazel"),
executable =3D False,
+ substitutions =3D {
+ "{zig_include_root}": shell.quote(zig_include_root),
+ },
+ )
+
+ repository_ctx.template(
+ "toolchain/BUILD",
+ Label("//toolchain/toolchain:BUILD.sdk.bazel"),
+ executable =3D False,
substitutions =3D {
"{absolute_path}": shell.quote(str(repository_ctx.path(""))),
"{zig_include_root}": shell.quote(zig_include_root),
@@ -302,13 +310,21 @@ def filegroup(name, **kwargs):
native.filegroup(name =3D name, **kwargs)
return ":" + name
=20
-def zig_build_macro(absolute_path, zig_include_root):
+def declare_files(zig_include_root):
filegroup(name =3D "empty")
native.exports_files(["zig"], visibility =3D ["//visibility:public"])
filegroup(name =3D "lib/std", srcs =3D native.glob(["lib/std/**"]))
=20
lazy_filegroups =3D {}
=20
+ for target_config in _target_structs():
+ for d in DEFAULT_INCLUDE_DIRECTORIES + target_config.includes:
+ d =3D zig_include_root + d
+ if d not in lazy_filegroups:
+ lazy_filegroups[d] =3D filegroup(name =3D d, srcs =3D native=
.glob([d + "/**"]))
+
+
+def declare_toolchains(absolute_path, zig_include_root):
for target_config in _target_structs():
gotarget =3D target_config.gotarget
zigtarget =3D target_config.zigtarget
@@ -316,8 +332,6 @@ def zig_build_macro(absolute_path, zig_include_root):
cxx_builtin_include_directories =3D []
for d in DEFAULT_INCLUDE_DIRECTORIES + target_config.includes:
d =3D zig_include_root + d
- if d not in lazy_filegroups:
- lazy_filegroups[d] =3D filegroup(name =3D d, srcs =3D native=
.glob([d + "/**"]))
cxx_builtin_include_directories.append(absolute_path + "/" + d)
for d in getattr(target_config, "toplevel_include", []):
cxx_builtin_include_directories.append(absolute_path + "/" + d)
@@ -338,7 +352,7 @@ def zig_build_macro(absolute_path, zig_include_root):
copts =3D copts + ["-include", absolute_path + "/" + incl]
=20
zig_cc_toolchain_config(
- name =3D zigtarget + "_toolchain_cc_config",
+ name =3D zigtarget + "_cc_config",
target =3D zigtarget,
tool_paths =3D absolute_tool_paths,
cxx_builtin_include_directories =3D cxx_builtin_include_director=
ies,
@@ -353,35 +367,34 @@ def zig_build_macro(absolute_path, zig_include_root):
)
=20
native.cc_toolchain(
- name =3D zigtarget + "_toolchain_cc",
+ name =3D zigtarget + "_cc",
toolchain_identifier =3D zigtarget + "-toolchain",
- toolchain_config =3D ":%s_toolchain_cc_config" % zigtarget,
- all_files =3D ":zig",
- ar_files =3D ":zig",
- compiler_files =3D ":zig",
- linker_files =3D ":zig",
- dwp_files =3D ":empty",
- objcopy_files =3D ":empty",
- strip_files =3D ":empty",
+ toolchain_config =3D ":%s_cc_config" % zigtarget,
+ all_files =3D "@zig_sdk//:zig",
+ ar_files =3D "@zig_sdk//:zig",
+ compiler_files =3D "@zig_sdk//:zig",
+ linker_files =3D "@zig_sdk//:zig",
+ dwp_files =3D "@zig_sdk//:empty",
+ objcopy_files =3D "@zig_sdk//:empty",
+ strip_files =3D "@zig_sdk//:empty",
supports_param_files =3D 0,
)
=20
# register two kinds of toolchain targets: Go and Zig conventions.
# Go convention: amd64/arm64, linux/darwin
native.toolchain(
- name =3D gotarget + "_toolchain",
+ name =3D gotarget,
exec_compatible_with =3D None,
target_compatible_with =3D target_config.constraint_values,
- toolchain =3D ":%s_toolchain_cc" % zigtarget,
+ toolchain =3D ":%s_cc" % zigtarget,
toolchain_type =3D "@bazel_tools//tools/cpp:toolchain_type",
)
=20
# Zig convention: x86_64/aarch64, linux/macos
native.toolchain(
- name =3D zigtarget + "_toolchain",
+ name =3D zigtarget,
exec_compatible_with =3D None,
target_compatible_with =3D target_config.constraint_values,
- toolchain =3D ":%s_toolchain_cc" % zigtarget,
+ toolchain =3D ":%s_cc" % zigtarget,
toolchain_type =3D "@bazel_tools//tools/cpp:toolchain_type",
)
-
diff --git a/toolchain/toolchain/BUILD b/toolchain/toolchain/BUILD
new file mode 100644
index 0000000..e69de29
diff --git a/toolchain/toolchain/BUILD.sdk.bazel b/toolchain/toolchain/BUILD.=
sdk.bazel
new file mode 100644
index 0000000..4b505dc
--- /dev/null
+++ b/toolchain/toolchain/BUILD.sdk.bazel
@@ -0,0 +1,10 @@
+load("@bazel-zig-cc//toolchain:defs.bzl", "declare_toolchains")
+
+package(
+ default_visibility =3D ["//visibility:public"],
+)
+
+declare_toolchains(
+ absolute_path =3D {absolute_path},
+ zig_include_root =3D {zig_include_root},
+)
--=20
2.34.1
From MAILER-DAEMON Wed Mar 8 11:59:04 2023
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Received: from git.sr.ht (unknown [173.195.146.142])
by mail-b.sr.ht (Postfix) with ESMTPSA id A38FF11EF0D
for <~motiejus/bazel-zig-cc@lists.sr.ht>; Thu, 7 Apr 2022 09:37:53 +0000 (UTC)
From: ~laurynasl <laurynasl@git.sr.ht>
Date: Wed, 06 Apr 2022 20:10:45 +0000
Subject: [PATCH bazel-zig-cc 4/4] Move toolchain definitions to toolchains/
Message-ID: <164932427279.26543.1789507091630612744-4@git.sr.ht>
X-Mailer: git.sr.ht
Reply-to: ~laurynasl <laurynasl@uber.com>
In-Reply-To: <164932427279.26543.1789507091630612744-0@git.sr.ht>
To: ~motiejus/bazel-zig-cc@lists.sr.ht
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
Status: O
Content-Length: 19852
Lines: 532
From: laurynasl <laurynasl@uber.com>
---
toolchain/defs.bzl | 214 +---------------------------
toolchain/private/BUILD | 0
toolchain/private/defs.bzl | 124 ++++++++++++++++
toolchain/toolchain/BUILD.sdk.bazel | 2 +-
toolchain/toolchain/defs.bzl | 87 +++++++++++
5 files changed, 215 insertions(+), 212 deletions(-)
create mode 100644 toolchain/private/BUILD
create mode 100644 toolchain/private/defs.bzl
create mode 100644 toolchain/toolchain/defs.bzl
diff --git a/toolchain/defs.bzl b/toolchain/defs.bzl
index 61e099f..084af86 100644
--- a/toolchain/defs.bzl
+++ b/toolchain/defs.bzl
@@ -1,23 +1,7 @@
load("@bazel_skylib//lib:shell.bzl", "shell")
load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
load("@bazel_tools//tools/build_defs/repo:utils.bzl", "read_user_netrc", "us=
e_netrc")
-load(":zig_toolchain.bzl", "zig_cc_toolchain_config")
-
-DEFAULT_TOOL_PATHS =3D {
- "ar": "ar",
- "gcc": "c++", # https://github.com/bazelbuild/bazel/issues/4644
- "cpp": "/usr/bin/false",
- "gcov": "/usr/bin/false",
- "nm": "/usr/bin/false",
- "objdump": "/usr/bin/false",
- "strip": "/usr/bin/false",
-}.items()
-
-DEFAULT_INCLUDE_DIRECTORIES =3D [
- "include",
- "libcxx/include",
- "libcxxabi/include",
-]
+load("@bazel-zig-cc//toolchain/private:defs.bzl", "DEFAULT_INCLUDE_DIRECTORI=
ES", "ZIG_TOOL_PATH", "target_structs")
=20
_fcntl_map =3D """
GLIBC_2.2.5 {
@@ -32,114 +16,6 @@ __asm__(".symver fcntl64, fcntl@GLIBC_2.2.5");
#endif
"""
=20
-# Zig supports even older glibcs than defined below, but we have tested only
-# down to 2.17.
-# $ zig targets | jq -r '.glibc[]' | sort -V
-_GLIBCS =3D [
- "2.17",
- "2.18",
- "2.19",
- "2.22",
- "2.23",
- "2.24",
- "2.25",
- "2.26",
- "2.27",
- "2.28",
- "2.29",
- "2.30",
- "2.31",
- "2.32",
- "2.33",
- "2.34",
-]
-
-def _target_darwin(gocpu, zigcpu):
- min_os =3D "10"
- if zigcpu =3D=3D "aarch64":
- min_os =3D "11"
- return struct(
- gotarget =3D "darwin_{}".format(gocpu),
- zigtarget =3D "{}-macos-gnu".format(zigcpu),
- includes =3D [
- "libunwind/include",
- # TODO: Define a toolchain for each minimum OS version
- "libc/include/{}-macos.{}-gnu".format(zigcpu, min_os),
- "libc/include/any-macos.{}-any".format(min_os),
- "libc/include/any-macos-any",
- ],
- linkopts =3D [],
- copts =3D [],
- bazel_target_cpu =3D "darwin",
- constraint_values =3D [
- "@platforms//os:macos",
- "@platforms//cpu:{}".format(zigcpu),
- ],
- tool_paths =3D {"ld": "ld64.lld"},
- )
-
-def _target_linux_gnu(gocpu, zigcpu, glibc_version =3D ""):
- glibc_suffix =3D "gnu"
- if glibc_version !=3D "":
- glibc_suffix =3D "gnu.{}".format(glibc_version)
-
- # https://github.com/ziglang/zig/issues/5882#issuecomment-888250676
- # fcntl_hack is only required for glibc 2.27 or less. We assume that
- # glibc_version =3D=3D "" (autodetect) is running a recent glibc version=
, thus
- # adding this hack only when glibc is explicitly 2.27 or lower.
- fcntl_hack =3D False
- if glibc_version =3D=3D "":
- # zig doesn't reliably detect the glibc version, so
- # often falls back to 2.17; the hack should be included.
- # https://github.com/ziglang/zig/issues/6469
- fcntl_hack =3D True
- else:
- # hack is required for 2.27 or less.
- fcntl_hack =3D glibc_version < "2.28"
-
- return struct(
- gotarget =3D "linux_{}_{}".format(gocpu, glibc_suffix),
- zigtarget =3D "{}-linux-{}".format(zigcpu, glibc_suffix),
- includes =3D [
- "libunwind/include",
- "libc/include/generic-glibc",
- "libc/include/any-linux-any",
- "libc/include/{}-linux-gnu".format(zigcpu),
- "libc/include/{}-linux-any".format(zigcpu),
- ] + (["libc/include/x86-linux-any"] if zigcpu =3D=3D "x86_64" else [=
]),
- toplevel_include =3D ["glibc-hacks"] if fcntl_hack else [],
- compiler_extra_includes =3D ["glibc-hacks/glibchack-fcntl.h"] if fcn=
tl_hack else [],
- linker_version_scripts =3D ["glibc-hacks/fcntl.map"] if fcntl_hack e=
lse [],
- linkopts =3D ["-lc++", "-lc++abi"],
- copts =3D [],
- bazel_target_cpu =3D "k8",
- constraint_values =3D [
- "@platforms//os:linux",
- "@platforms//cpu:{}".format(zigcpu),
- ],
- tool_paths =3D {"ld": "ld.lld"},
- )
-
-def _target_linux_musl(gocpu, zigcpu):
- return struct(
- gotarget =3D "linux_{}_musl".format(gocpu),
- zigtarget =3D "{}-linux-musl".format(zigcpu),
- includes =3D [
- "libc/include/generic-musl",
- "libc/include/any-linux-any",
- "libc/include/{}-linux-musl".format(zigcpu),
- "libc/include/{}-linux-any".format(zigcpu),
- ] + (["libc/include/x86-linux-any"] if zigcpu =3D=3D "x86_64" else [=
]),
- linkopts =3D ["-s", "-w"],
- copts =3D ["-D_LIBCPP_HAS_MUSL_LIBC", "-D_LIBCPP_HAS_THREAD_API_PTHR=
EAD"],
- bazel_target_cpu =3D "k8",
- constraint_values =3D [
- "@platforms//os:linux",
- "@platforms//cpu:{}".format(zigcpu),
- ],
- tool_paths =3D {"ld": "ld.lld"},
- )
-
# Official recommended version. Should use this when we have a usable releas=
e.
URL_FORMAT_RELEASE =3D "https://ziglang.org/download/{version}/zig-{host_pla=
tform}-{version}.tar.xz"
=20
@@ -192,7 +68,6 @@ def register_toolchains(
toolchains =3D ["@zig_sdk//:toolchain:%s" % t for t in register]
native.register_toolchains(*toolchains)
=20
-ZIG_TOOL_PATH =3D "tools/{zig_tool}"
ZIG_TOOL_WRAPPER =3D """#!/bin/bash
set -e
=20
@@ -297,14 +172,7 @@ zig_repository =3D repository_rule(
implementation =3D _zig_repository_impl,
)
=20
-def _target_structs():
- ret =3D []
- for zigcpu, gocpu in (("x86_64", "amd64"), ("aarch64", "arm64")):
- ret.append(_target_darwin(gocpu, zigcpu))
- ret.append(_target_linux_musl(gocpu, zigcpu))
- for glibc in [""] + _GLIBCS:
- ret.append(_target_linux_gnu(gocpu, zigcpu, glibc))
- return ret
+
=20
def filegroup(name, **kwargs):
native.filegroup(name =3D name, **kwargs)
@@ -317,84 +185,8 @@ def declare_files(zig_include_root):
=20
lazy_filegroups =3D {}
=20
- for target_config in _target_structs():
+ for target_config in target_structs():
for d in DEFAULT_INCLUDE_DIRECTORIES + target_config.includes:
d =3D zig_include_root + d
if d not in lazy_filegroups:
lazy_filegroups[d] =3D filegroup(name =3D d, srcs =3D native=
.glob([d + "/**"]))
-
-
-def declare_toolchains(absolute_path, zig_include_root):
- for target_config in _target_structs():
- gotarget =3D target_config.gotarget
- zigtarget =3D target_config.zigtarget
-
- cxx_builtin_include_directories =3D []
- for d in DEFAULT_INCLUDE_DIRECTORIES + target_config.includes:
- d =3D zig_include_root + d
- cxx_builtin_include_directories.append(absolute_path + "/" + d)
- for d in getattr(target_config, "toplevel_include", []):
- cxx_builtin_include_directories.append(absolute_path + "/" + d)
-
- absolute_tool_paths =3D {}
- for name, path in target_config.tool_paths.items() + DEFAULT_TOOL_PA=
THS:
- if path[0] =3D=3D "/":
- absolute_tool_paths[name] =3D path
- continue
- tool_path =3D ZIG_TOOL_PATH.format(zig_tool =3D path)
- absolute_tool_paths[name] =3D "%s/%s" % (absolute_path, tool_pat=
h)
-
- linkopts =3D target_config.linkopts
- copts =3D target_config.copts
- for s in getattr(target_config, "linker_version_scripts", []):
- linkopts =3D linkopts + ["-Wl,--version-script,%s/%s" % (absolut=
e_path, s)]
- for incl in getattr(target_config, "compiler_extra_includes", []):
- copts =3D copts + ["-include", absolute_path + "/" + incl]
-
- zig_cc_toolchain_config(
- name =3D zigtarget + "_cc_config",
- target =3D zigtarget,
- tool_paths =3D absolute_tool_paths,
- cxx_builtin_include_directories =3D cxx_builtin_include_director=
ies,
- copts =3D copts,
- linkopts =3D linkopts,
- target_cpu =3D target_config.bazel_target_cpu,
- target_system_name =3D "unknown",
- target_libc =3D "unknown",
- compiler =3D "clang",
- abi_version =3D "unknown",
- abi_libc_version =3D "unknown",
- )
-
- native.cc_toolchain(
- name =3D zigtarget + "_cc",
- toolchain_identifier =3D zigtarget + "-toolchain",
- toolchain_config =3D ":%s_cc_config" % zigtarget,
- all_files =3D "@zig_sdk//:zig",
- ar_files =3D "@zig_sdk//:zig",
- compiler_files =3D "@zig_sdk//:zig",
- linker_files =3D "@zig_sdk//:zig",
- dwp_files =3D "@zig_sdk//:empty",
- objcopy_files =3D "@zig_sdk//:empty",
- strip_files =3D "@zig_sdk//:empty",
- supports_param_files =3D 0,
- )
-
- # register two kinds of toolchain targets: Go and Zig conventions.
- # Go convention: amd64/arm64, linux/darwin
- native.toolchain(
- name =3D gotarget,
- exec_compatible_with =3D None,
- target_compatible_with =3D target_config.constraint_values,
- toolchain =3D ":%s_cc" % zigtarget,
- toolchain_type =3D "@bazel_tools//tools/cpp:toolchain_type",
- )
-
- # Zig convention: x86_64/aarch64, linux/macos
- native.toolchain(
- name =3D zigtarget,
- exec_compatible_with =3D None,
- target_compatible_with =3D target_config.constraint_values,
- toolchain =3D ":%s_cc" % zigtarget,
- toolchain_type =3D "@bazel_tools//tools/cpp:toolchain_type",
- )
diff --git a/toolchain/private/BUILD b/toolchain/private/BUILD
new file mode 100644
index 0000000..e69de29
diff --git a/toolchain/private/defs.bzl b/toolchain/private/defs.bzl
new file mode 100644
index 0000000..8380071
--- /dev/null
+++ b/toolchain/private/defs.bzl
@@ -0,0 +1,124 @@
+DEFAULT_INCLUDE_DIRECTORIES =3D [
+ "include",
+ "libcxx/include",
+ "libcxxabi/include",
+]
+
+ZIG_TOOL_PATH =3D "tools/{zig_tool}"
+
+# Zig supports even older glibcs than defined below, but we have tested only
+# down to 2.17.
+# $ zig targets | jq -r '.glibc[]' | sort -V
+_GLIBCS =3D [
+ "2.17",
+ "2.18",
+ "2.19",
+ "2.22",
+ "2.23",
+ "2.24",
+ "2.25",
+ "2.26",
+ "2.27",
+ "2.28",
+ "2.29",
+ "2.30",
+ "2.31",
+ "2.32",
+ "2.33",
+ "2.34",
+]
+
+def target_structs():
+ ret =3D []
+ for zigcpu, gocpu in (("x86_64", "amd64"), ("aarch64", "arm64")):
+ ret.append(_target_darwin(gocpu, zigcpu))
+ ret.append(_target_linux_musl(gocpu, zigcpu))
+ for glibc in [""] + _GLIBCS:
+ ret.append(_target_linux_gnu(gocpu, zigcpu, glibc))
+ return ret
+
+def _target_darwin(gocpu, zigcpu):
+ min_os =3D "10"
+ if zigcpu =3D=3D "aarch64":
+ min_os =3D "11"
+ return struct(
+ gotarget =3D "darwin_{}".format(gocpu),
+ zigtarget =3D "{}-macos-gnu".format(zigcpu),
+ includes =3D [
+ "libunwind/include",
+ # TODO: Define a toolchain for each minimum OS version
+ "libc/include/{}-macos.{}-gnu".format(zigcpu, min_os),
+ "libc/include/any-macos.{}-any".format(min_os),
+ "libc/include/any-macos-any",
+ ],
+ linkopts =3D [],
+ copts =3D [],
+ bazel_target_cpu =3D "darwin",
+ constraint_values =3D [
+ "@platforms//os:macos",
+ "@platforms//cpu:{}".format(zigcpu),
+ ],
+ tool_paths =3D {"ld": "ld64.lld"},
+ )
+
+def _target_linux_gnu(gocpu, zigcpu, glibc_version =3D ""):
+ glibc_suffix =3D "gnu"
+ if glibc_version !=3D "":
+ glibc_suffix =3D "gnu.{}".format(glibc_version)
+
+ # https://github.com/ziglang/zig/issues/5882#issuecomment-888250676
+ # fcntl_hack is only required for glibc 2.27 or less. We assume that
+ # glibc_version =3D=3D "" (autodetect) is running a recent glibc version=
, thus
+ # adding this hack only when glibc is explicitly 2.27 or lower.
+ fcntl_hack =3D False
+ if glibc_version =3D=3D "":
+ # zig doesn't reliably detect the glibc version, so
+ # often falls back to 2.17; the hack should be included.
+ # https://github.com/ziglang/zig/issues/6469
+ fcntl_hack =3D True
+ else:
+ # hack is required for 2.27 or less.
+ fcntl_hack =3D glibc_version < "2.28"
+
+ return struct(
+ gotarget =3D "linux_{}_{}".format(gocpu, glibc_suffix),
+ zigtarget =3D "{}-linux-{}".format(zigcpu, glibc_suffix),
+ includes =3D [
+ "libunwind/include",
+ "libc/include/generic-glibc",
+ "libc/include/any-linux-any",
+ "libc/include/{}-linux-gnu".format(zigcpu),
+ "libc/include/{}-linux-any".format(zigcpu),
+ ] + (["libc/include/x86-linux-any"] if zigcpu =3D=3D "x86_64" else [=
]),
+ toplevel_include =3D ["glibc-hacks"] if fcntl_hack else [],
+ compiler_extra_includes =3D ["glibc-hacks/glibchack-fcntl.h"] if fcn=
tl_hack else [],
+ linker_version_scripts =3D ["glibc-hacks/fcntl.map"] if fcntl_hack e=
lse [],
+ linkopts =3D ["-lc++", "-lc++abi"],
+ copts =3D [],
+ bazel_target_cpu =3D "k8",
+ constraint_values =3D [
+ "@platforms//os:linux",
+ "@platforms//cpu:{}".format(zigcpu),
+ ],
+ tool_paths =3D {"ld": "ld.lld"},
+ )
+
+def _target_linux_musl(gocpu, zigcpu):
+ return struct(
+ gotarget =3D "linux_{}_musl".format(gocpu),
+ zigtarget =3D "{}-linux-musl".format(zigcpu),
+ includes =3D [
+ "libc/include/generic-musl",
+ "libc/include/any-linux-any",
+ "libc/include/{}-linux-musl".format(zigcpu),
+ "libc/include/{}-linux-any".format(zigcpu),
+ ] + (["libc/include/x86-linux-any"] if zigcpu =3D=3D "x86_64" else [=
]),
+ linkopts =3D ["-s", "-w"],
+ copts =3D ["-D_LIBCPP_HAS_MUSL_LIBC", "-D_LIBCPP_HAS_THREAD_API_PTHR=
EAD"],
+ bazel_target_cpu =3D "k8",
+ constraint_values =3D [
+ "@platforms//os:linux",
+ "@platforms//cpu:{}".format(zigcpu),
+ ],
+ tool_paths =3D {"ld": "ld.lld"},
+ )
diff --git a/toolchain/toolchain/BUILD.sdk.bazel b/toolchain/toolchain/BUILD.=
sdk.bazel
index 4b505dc..7cbca73 100644
--- a/toolchain/toolchain/BUILD.sdk.bazel
+++ b/toolchain/toolchain/BUILD.sdk.bazel
@@ -1,4 +1,4 @@
-load("@bazel-zig-cc//toolchain:defs.bzl", "declare_toolchains")
+load("@bazel-zig-cc//toolchain/toolchain:defs.bzl", "declare_toolchains")
=20
package(
default_visibility =3D ["//visibility:public"],
diff --git a/toolchain/toolchain/defs.bzl b/toolchain/toolchain/defs.bzl
new file mode 100644
index 0000000..1b0c087
--- /dev/null
+++ b/toolchain/toolchain/defs.bzl
@@ -0,0 +1,87 @@
+load("@bazel-zig-cc//toolchain:zig_toolchain.bzl", "zig_cc_toolchain_config")
+load("@bazel-zig-cc//toolchain/private:defs.bzl", "DEFAULT_INCLUDE_DIRECTORI=
ES", "ZIG_TOOL_PATH", "target_structs")
+
+DEFAULT_TOOL_PATHS =3D {
+ "ar": "ar",
+ "gcc": "c++", # https://github.com/bazelbuild/bazel/issues/4644
+ "cpp": "/usr/bin/false",
+ "gcov": "/usr/bin/false",
+ "nm": "/usr/bin/false",
+ "objdump": "/usr/bin/false",
+ "strip": "/usr/bin/false",
+}.items()
+
+def declare_toolchains(absolute_path, zig_include_root):
+ for target_config in target_structs():
+ gotarget =3D target_config.gotarget
+ zigtarget =3D target_config.zigtarget
+
+ cxx_builtin_include_directories =3D []
+ for d in DEFAULT_INCLUDE_DIRECTORIES + target_config.includes:
+ d =3D zig_include_root + d
+ cxx_builtin_include_directories.append(absolute_path + "/" + d)
+ for d in getattr(target_config, "toplevel_include", []):
+ cxx_builtin_include_directories.append(absolute_path + "/" + d)
+
+ absolute_tool_paths =3D {}
+ for name, path in target_config.tool_paths.items() + DEFAULT_TOOL_PA=
THS:
+ if path[0] =3D=3D "/":
+ absolute_tool_paths[name] =3D path
+ continue
+ tool_path =3D ZIG_TOOL_PATH.format(zig_tool =3D path)
+ absolute_tool_paths[name] =3D "%s/%s" % (absolute_path, tool_pat=
h)
+
+ linkopts =3D target_config.linkopts
+ copts =3D target_config.copts
+ for s in getattr(target_config, "linker_version_scripts", []):
+ linkopts =3D linkopts + ["-Wl,--version-script,%s/%s" % (absolut=
e_path, s)]
+ for incl in getattr(target_config, "compiler_extra_includes", []):
+ copts =3D copts + ["-include", absolute_path + "/" + incl]
+
+ zig_cc_toolchain_config(
+ name =3D zigtarget + "_cc_config",
+ target =3D zigtarget,
+ tool_paths =3D absolute_tool_paths,
+ cxx_builtin_include_directories =3D cxx_builtin_include_director=
ies,
+ copts =3D copts,
+ linkopts =3D linkopts,
+ target_cpu =3D target_config.bazel_target_cpu,
+ target_system_name =3D "unknown",
+ target_libc =3D "unknown",
+ compiler =3D "clang",
+ abi_version =3D "unknown",
+ abi_libc_version =3D "unknown",
+ )
+
+ native.cc_toolchain(
+ name =3D zigtarget + "_cc",
+ toolchain_identifier =3D zigtarget + "-toolchain",
+ toolchain_config =3D ":%s_cc_config" % zigtarget,
+ all_files =3D "@zig_sdk//:zig",
+ ar_files =3D "@zig_sdk//:zig",
+ compiler_files =3D "@zig_sdk//:zig",
+ linker_files =3D "@zig_sdk//:zig",
+ dwp_files =3D "@zig_sdk//:empty",
+ objcopy_files =3D "@zig_sdk//:empty",
+ strip_files =3D "@zig_sdk//:empty",
+ supports_param_files =3D 0,
+ )
+
+ # register two kinds of toolchain targets: Go and Zig conventions.
+ # Go convention: amd64/arm64, linux/darwin
+ native.toolchain(
+ name =3D gotarget,
+ exec_compatible_with =3D None,
+ target_compatible_with =3D target_config.constraint_values,
+ toolchain =3D ":%s_cc" % zigtarget,
+ toolchain_type =3D "@bazel_tools//tools/cpp:toolchain_type",
+ )
+
+ # Zig convention: x86_64/aarch64, linux/macos
+ native.toolchain(
+ name =3D zigtarget,
+ exec_compatible_with =3D None,
+ target_compatible_with =3D target_config.constraint_values,
+ toolchain =3D ":%s_cc" % zigtarget,
+ toolchain_type =3D "@bazel_tools//tools/cpp:toolchain_type",
+ )
--=20
2.34.1
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Date: Thu, 7 Apr 2022 13:16:25 +0300
From: Motiejus =?utf-8?Q?Jak=C5=A1tys?= <motiejus@jakstys.lt>
To: ~motiejus/bazel-zig-cc@lists.sr.ht
Subject: RW access to contributors; talk in zig meetup
Message-ID: <20220407101625.aahrqx4fa4qme56i@mtpad.i.jakstys.lt>
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Hi all,
As I've received significant contributions from Ken Micklas and Laurynas
Lubys, I decided to grant them write access to bazel-zig-cc. Here is an
email I've sent them privately with the rules:
- When WIP, feel free to push your code to <your name>/<feature name>
branch. Remove the branch when done.
- When ready for merging, push it to the `next` branch and ping me.
- I will keep merging to `main`, tagging the releases keep emailing the
announcements.
That way, `main` will still have the latest tagged release signed by me.
I will also be talking about bazel-zig-cc in the upcoming Zig meetup
this weekend[1]. I was also listed in Google FOSS peer award and
"earned" $250 for bazel-zig-cc[2]. Thanks Google!
Regards,
Motiejus
[1]: https://twitter.com/croloris/status/1511342711764303890
[2]: https://opensource.googleblog.com/2022/03/Announcing-First-Group-of-Google-Open-Source-Peer-Bonus-Winners-in-2022.html
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From: Motiejus =?utf-8?Q?Jak=C5=A1tys?= <motiejus@jakstys.lt>
To: ~motiejus/bazel-zig-cc@lists.sr.ht
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Hi all,
this change is a breaking change to bazel-zig-cc. Main points (from changelog):
### [laurynasl] Hide toolchain internals
This is a long-standing issue where platforms, toolchains and private stuff was
mixed together. Now platforms and toolchains are defined in their own
namespaces:
$ bazel query @zig_sdk//platform:*
@zig_sdk//platform:BUILD
@zig_sdk//platform:darwin_aarch64
@zig_sdk//platform:darwin_amd64
@zig_sdk//platform:darwin_arm64
@zig_sdk//platform:darwin_x86_64
@zig_sdk//platform:linux_aarch64
@zig_sdk//platform:linux_amd64
@zig_sdk//platform:linux_arm64
@zig_sdk//platform:linux_x86_64
@zig_sdk//platform:macos_aarch64
@zig_sdk//platform:macos_amd64
@zig_sdk//platform:macos_arm64
@zig_sdk//platform:macos_x86_64
$ bazel query @zig_sdk//toolchain:* | head -10
Loading: 0 packages loaded
@zig_sdk//toolchain:BUILD
@zig_sdk//toolchain:aarch64-linux-gnu
@zig_sdk//toolchain:aarch64-linux-gnu.2.17
@zig_sdk//toolchain:aarch64-linux-gnu.2.18
@zig_sdk//toolchain:aarch64-linux-gnu.2.19
@zig_sdk//toolchain:aarch64-linux-gnu.2.22
@zig_sdk//toolchain:aarch64-linux-gnu.2.23
@zig_sdk//toolchain:aarch64-linux-gnu.2.24
@zig_sdk//toolchain:aarch64-linux-gnu.2.25
@zig_sdk//toolchain:aarch64-linux-gnu.2.26
Thanks Laurynas!
### [Ken Micklas] Upgrade to Bazel 5.1.0
... we now require minimal bazel 5.1.0. And there are some other minor
CI improvements, like specifying golang version for reproducibility.
Laurynas is preparing a different way to specify musl and glibc
platforms by selecting the platform, not the toolchain. This should
happen soon. This was desirable from day 0, but I couldn't make it
happen reliably at the time, so resorted to `--extra_toolchains`.
Looking forward to it!
Motiejus
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From: Motiejus =?utf-8?Q?Jak=C5=A1tys?= <motiejus@jakstys.lt>
To: ~motiejus/bazel-zig-cc@lists.sr.ht
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Hi all,
Slight rule correction:
On Thu, Apr 07, 2022 at 01:16:25PM +0300, Motiejus Jakštys wrote:
> - When ready for merging, push it to the `next` branch and ping me.
Since I allow for force-pushes, we have 3 contributors, `next` doesn't
make sense. So push to "your" branch (<your name>/<feature slug>) and
I'll merge from there.
So we should have only those branches in ~motiejus/bazel-zig-cc:
- `main`: passes CI and is always the latest released tag.
- for our sandbox work: `motiejus/<X>`, `laurynasl/<X>`,
`kmicklas/<X>`. You are the boss there.
There seems to be a problem with sourcehut picking the patches from the
mailing list, which I reported to `#sr.ht:libera.chat`:
UI-generated patchset
(https://lists.sr.ht/~motiejus/bazel-zig-cc/%3C164932427279.26543.1789507091630612744-0%40git.sr.ht%3E)
did not end up in https://lists.sr.ht/~motiejus/bazel-zig-cc/patches
and, consequently, did not trigger a CI run. Is this appropriate
place to report it? Happened ~1 hour ago.
Motiejus
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From: ~laurynasl <laurynasl@git.sr.ht>
Date: Fri, 08 Apr 2022 13:03:53 +0000
Subject:
[PATCH bazel-zig-cc 0/1] Fix the register parameter in register toolchain
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Looks like this slipped through the CI. We should think about how to
catch cases like these.
laurynasl (1):
Fix register toolchain
toolchain/defs.bzl | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--
2.34.1
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From: ~laurynasl <laurynasl@git.sr.ht>
Date: Fri, 08 Apr 2022 12:55:52 +0000
Subject: [PATCH bazel-zig-cc 1/1] Fix register toolchain
Message-ID: <164942303327.26005.14403108374611803240-1@git.sr.ht>
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From: laurynasl <laurynasl@uber.com>
---
toolchain/defs.bzl | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/toolchain/defs.bzl b/toolchain/defs.bzl
index ebcb65e..9e34e6b 100644
--- a/toolchain/defs.bzl
+++ b/toolchain/defs.bzl
@@ -65,7 +65,7 @@ def register_toolchains(
},
)
- toolchains = ["@zig_sdk//:toolchain:%s" % t for t in register]
+ toolchains = ["@zig_sdk//toolchain:%s" % t for t in register]
native.register_toolchains(*toolchains)
ZIG_TOOL_WRAPPER = """#!/bin/bash
--
2.34.1
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Subject: [bazel-zig-cc/patches/.build.yml] build success
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bazel-zig-cc/patches/.build.yml: SUCCESS in 13m56s
[Fix the register parameter in register toolchain][0] from [~laurynasl][1]
[0]: https://lists.sr.ht/~motiejus/bazel-zig-cc/patches/30909
[1]: mailto:laurynasl@uber.com
=E2=9C=93 #732421 SUCCESS bazel-zig-cc/patches/.build.yml https://builds.sr=
.ht/~motiejus/job/732421
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From: Motiejus =?utf-8?Q?Jak=C5=A1tys?= <motiejus@jakstys.lt>
To: ~laurynasl <laurynasl@uber.com>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht
Subject: Re: [PATCH bazel-zig-cc 0/1] Fix the register parameter in register
toolchain
Message-ID: <20220408211538.srx5swx4reuf4n2x@mtpad.i.jakstys.lt>
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On Fri, Apr 08, 2022 at 01:03:53PM +0000, ~laurynasl wrote:
> Looks like this slipped through the CI. We should think about how to
> catch cases like these.
I think the next step, where you suggested replacing
`--extra_toolchains` with
registering-all-toolchains-and-specifying-the-platforms, would have
helped here?
Once transitioned to platforms, I expect us to stop specifying the
`--extra_toolchains` and only use platform constraints. Then write a
couple of test targets and confirm they are building artifacts for
correct architectures
Transitions can even allow `sh_test` targets, which would run `file` on
the output binary and assert it's architecture. The `ci/test` script
would become even simpler.
> laurynasl (1):
> Fix register toolchain
>
> toolchain/defs.bzl | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
Applied and released v0.6.1. Thank you.
Motiejus
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From: Motiejus =?utf-8?Q?Jak=C5=A1tys?= <motiejus@jakstys.lt>
To: ~motiejus/bazel-zig-cc@lists.sr.ht
Subject: upcoming changes in bazel-zig-cc v0.7
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Hi all,
Laurynas rewrote bazel-zig-cc. Now it will support specifying
arch/os/libc via *platforms* alone (provided toolchains are registered).
E.g.
--platforms @zig_sdk//libc_aware/platform:linux_amd64_gnu.2.28
--platforms @zig_sdk//libc_aware/platform:linux_amd64_musl
I intend to merge this on ~Tuesday. There will be (almost) no breaking
changes, but many new ways to use bazel-zig-cc. I am excited about this
release, as now it makes many things "right". Read the README. :)
While updating documentation, I accidentally wrote my mental model on
how `--platforms`, `--toolchains` and constraints interact. If you find
lies there, please let me know, I will un-lie them.
Here are the updated docs; notice they are much longer than the
original:
https://git.sr.ht/~motiejus/bazel-zig-cc/tree/laurynasl_libc/item/README.md?view-rendered
Thanks Laurynai!
Motiejus
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To: ~motiejus/bazel-zig-cc@lists.sr.ht
Subject: bazel-zig-cc v0.7.0
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Hi all,
I've released bazel-zig-cc v0.7.0. It's a rewrite by laurynasl@ and
major documentation upgrade by myself.
Incompatible changes
--------------------
1. `register_toolchains` renamed to `toolchains`. Before:
load("@bazel-zig-cc//toolchain:defs.bzl", zig_register_toolchains = "register_toolchains")
After:
load("@bazel-zig-cc//toolchain:defs.bzl", zig_toolchains = "toolchains")
2. `toolchains(register = ...)` was removed. You should be registering
the toolchains directly in the WORKSPACE or via `.bazelrc` (see README).
3. "glibc version autodetection" is removed: the glibc version must now
be always specified.
New Features
------------
1. Now one can specify the libc variant (glibc+version or libc) via
`--platforms` alone. See README.
2. Internal: more examples with multiple architectures, transitions, and
a new "C" test case.
Ecosystem
---------
While testing this internally, we've realized that the new version of
rules_docker[1] is not compatible with the new libc-in-the-platform
feature, since the libc version is *part of the platform now*. Laurynas
will comment in the PR with more details.
Enjoy!
Motiejus
[1]: https://github.com/bazelbuild/rules_docker/pull/1963
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From: Laurynas Lubys <laurynasl@uber.com>
Date: Wed, 20 Apr 2022 15:20:26 +0300
Message-ID: <CAG09j4-XZtiP-zs6GGW=5uZrN2OZ2DcX+nD58Odpfgbc85JP8w@mail.gmail.com>
Subject: Re: bazel-zig-cc v0.7.0
To: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht
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Regarding rules_docker:
In 0.23.0, rules_docker added transitions based on the architecture
and operating system specified on the container_image. The platform
transition is "hard-coded" in a sense where it will use a specific
platform that only includes the os and cpu constraints. This means
that it is not possible to provide a platform which includes a libc
version. There seem to still be some discussion on how this should
best be solved in rules_docker.
Cheers,
Laurynas
On Wed, Apr 20, 2022 at 12:37 PM Motiejus Jak=C5=A1tys <motiejus@jakstys.lt=
> wrote:
>
> Hi all,
>
> I've released bazel-zig-cc v0.7.0. It's a rewrite by laurynasl@ and
> major documentation upgrade by myself.
>
> Incompatible changes
> --------------------
>
> 1. `register_toolchains` renamed to `toolchains`. Before:
>
> load("@bazel-zig-cc//toolchain:defs.bzl", zig_register_toolchains=
=3D "register_toolchains")
>
> After:
>
> load("@bazel-zig-cc//toolchain:defs.bzl", zig_toolchains =3D "too=
lchains")
>
> 2. `toolchains(register =3D ...)` was removed. You should be registering
> the toolchains directly in the WORKSPACE or via `.bazelrc` (see READM=
E).
>
> 3. "glibc version autodetection" is removed: the glibc version must now
> be always specified.
>
> New Features
> ------------
>
> 1. Now one can specify the libc variant (glibc+version or libc) via
> `--platforms` alone. See README.
>
> 2. Internal: more examples with multiple architectures, transitions, and
> a new "C" test case.
>
> Ecosystem
> ---------
>
> While testing this internally, we've realized that the new version of
> rules_docker[1] is not compatible with the new libc-in-the-platform
> feature, since the libc version is *part of the platform now*. Laurynas
> will comment in the PR with more details.
>
> Enjoy!
> Motiejus
>
> [1]: https://github.com/bazelbuild/rules_docker/pull/1963
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From: Motiejus =?utf-8?Q?Jak=C5=A1tys?= <motiejus@jakstys.lt>
To: ~motiejus/bazel-zig-cc@lists.sr.ht
Subject: bazel-zig-cc v0.7.1
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Hi everyone,
I just cut bazel-zig-cc v0.7.1, which adds a workaround for the infamous
libc linking problem:
net(.text): relocation target __errno_location not defined
net(.text): relocation target getaddrinfo not defined
<...>
Read about it, as well as related issues, in this github summary[1].
Many thanks to Andrew Kelley and Ken Micklas for working on it!
What is the cause? Because `zig cc` adds `--gc-sections` to the `ld.lld`
flags, which does not play well with cgo. So the workaround adds
`--no-gc-sections` to the linker flags for the time being.
Motiejus
[1]: https://github.com/ziglang/zig/pull/11577
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From: Motiejus =?utf-8?Q?Jak=C5=A1tys?= <motiejus@jakstys.lt>
To: ~motiejus/bazel-zig-cc@lists.sr.ht
Subject: bazel-zig-cc v0.7.2
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Hi all,
It was a long time ago since the last Zig SDK update. I just released
v0.7.2, which updates the zig to tonight's build
zig-0.10.0-dev.2252+a4369918b, along with bazel-zig-cc's test
dependencies (rules_go, bazel-gazelle, golang).
Also, I removed many prehistorical zig-sdk versions from the
dl.jakstys.lt mirror and left only the ones referenced by v0.7.1 and
v0.7.2. If your build broke as a result, it's a good time to reconsider
hosting zig sdk yourself.
Regards,
Motiejus
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To: ~motiejus/bazel-zig-cc@lists.sr.ht
Cc: Fabian Hahn <fabian@hahn.graphics>
Subject: [PATCH bazel-zig-cc 0/3] Windows support
Date: Fri, 20 May 2022 16:02:29 +0100
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Hello there,
First of all, thank you for this great project! I was always intrigued
by zig's C/C++ compilation abilities but wasn't too keen on adopting it
as a build system. Being able to use zig as a bazel toolchain using this
project is incredible and exactly the way I always wanted to use zig.
My intended use case for bazel-zig-cc was to enable cross compilation
between the two supported platforms Linux and Windows in my project [1].
To this end, I started looking into extending bazel-zig-cc with Windows
support both as a host and target system. The attached three commits in
made this work and successfully allowed me to cross compile all of my
cc_binary targets between Linux and Windows using zig cc. That said,
they do not actually depend on each other and can be used individually.
I hope others might find them useful, too, and would like to ask you to
consider accepting them into the mainline of the project.
Best,
Fabian
[1] https://github.com/FabianHahn/shoveler
Fabian Hahn (3):
added windows host support
added support for Windows targets
added platform constraint setting for selecting if zig cc is used
toolchain/BUILD.sdk.bazel | 1 +
toolchain/defs.bzl | 58 +++++++++++++++++++++++------
toolchain/platform/BUILD | 15 ++++++++
toolchain/platform/defs.bzl | 8 +++-
toolchain/private/BUILD.sdk.bazel | 1 +
toolchain/private/cc_toolchains.bzl | 6 +--
toolchain/private/defs.bzl | 27 +++++++++++++-
7 files changed, 99 insertions(+), 17 deletions(-)
--
2.17.1
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To: ~motiejus/bazel-zig-cc@lists.sr.ht
Cc: Fabian Hahn <fabian@hahn.graphics>
Subject: [PATCH bazel-zig-cc 1/3] added windows host support
Date: Fri, 20 May 2022 16:02:30 +0100
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---
This commit adds support for Windows as a host system. For example, given
an existing bazel project on Windows, this commit enables cross
compilation to other supported target platforms of bazel-zig-cc such as
Linux. I've successfully used it to cross compile a Linux cc_binary from a
Windows machine and validated that it works correctly by copying it to a
Linux box and launching it there.
Apart from downloading the correct zig SDK version on Windows, the main
crux here was to actually make all of the zig tools properly executable.
In order for the wrapper script to be executable, it needs to be a batch
script with the proper extension instead of bash. Further, the actual
zig binary itself is called zig.exe instead of just zig on Windows.
toolchain/BUILD.sdk.bazel | 1 +
toolchain/defs.bzl | 58 +++++++++++++++++++++++------
toolchain/private/BUILD.sdk.bazel | 1 +
toolchain/private/cc_toolchains.bzl | 6 +--
toolchain/private/defs.bzl | 8 +++-
5 files changed, 58 insertions(+), 16 deletions(-)
diff --git a/toolchain/BUILD.sdk.bazel b/toolchain/BUILD.sdk.bazel
index ada3e5d..e1505b1 100644
--- a/toolchain/BUILD.sdk.bazel
+++ b/toolchain/BUILD.sdk.bazel
@@ -7,6 +7,7 @@ package(
declare_files(
+ os = {os},
zig_include_root = {zig_include_root},
)
diff --git a/toolchain/defs.bzl b/toolchain/defs.bzl
index 9ab4e88..d334aca 100644
--- a/toolchain/defs.bzl
+++ b/toolchain/defs.bzl
@@ -1,6 +1,6 @@
load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
load("@bazel_tools//tools/build_defs/repo:utils.bzl", "read_user_netrc", "use_netrc")
-load("@bazel-zig-cc//toolchain/private:defs.bzl", "DEFAULT_INCLUDE_DIRECTORIES", "ZIG_TOOL_PATH", "target_structs")
+load("@bazel-zig-cc//toolchain/private:defs.bzl", "DEFAULT_INCLUDE_DIRECTORIES", "zig_tool_path", "target_structs")
_fcntl_map = """
GLIBC_2.2.5 {
@@ -16,21 +16,21 @@ __asm__(".symver fcntl64, fcntl@GLIBC_2.2.5");
"""
# Official recommended version. Should use this when we have a usable release.
-URL_FORMAT_RELEASE = "https://ziglang.org/download/{version}/zig-{host_platform}-{version}.tar.xz"
+URL_FORMAT_RELEASE = "https://ziglang.org/download/{version}/zig-{host_platform}-{version}.{ext}"
# Caution: nightly releases are purged from ziglang.org after ~90 days. A real
# solution would be to allow the downstream project specify their own mirrors.
# This is explained in
# https://sr.ht/~motiejus/bazel-zig-cc/#alternative-download-urls and is
# awaiting my attention or your contribution.
-URL_FORMAT_NIGHTLY = "https://ziglang.org/builds/zig-{host_platform}-{version}.tar.xz"
+URL_FORMAT_NIGHTLY = "https://ziglang.org/builds/zig-{host_platform}-{version}.{ext}"
# Author's mirror that doesn't purge the nightlies so aggressively. I will be
# cleaning those up manually only after the artifacts are not in use for many
# months in bazel-zig-cc. dl.jakstys.lt is a small x86_64 server with an NVMe
# drive sitting in my home closet on a 1GB/s symmetric residential connection,
# which, as of writing, has been quite reliable.
-URL_FORMAT_JAKSTYS = "https://dl.jakstys.lt/zig/zig-{host_platform}-{version}.tar.xz"
+URL_FORMAT_JAKSTYS = "https://dl.jakstys.lt/zig/zig-{host_platform}-{version}.{ext}"
_VERSION = "0.10.0-dev.2252+a4369918b"
@@ -39,12 +39,22 @@ _HOST_PLATFORM_SHA256 = {
"linux-x86_64": "1d3c3769eba85a4334c93a3cfa35ad0ef914dd8cf9fd502802004c6908f5370c",
"macos-aarch64": "ab46e7499e5bd7b6d6ff2ac331e1a4aa875a01b270dc40306bc29dbaf216fccf",
"macos-x86_64": "fb213f996bcab805839e401292c42a92b63cd97deb1631e31bd61f534b7f6b1c",
+ "windows-x86_64": "14e43a64026512161f3d6201d8972a28f0508da2782c16e980f2ffa3bb7e6720",
+}
+
+_HOST_PLATFORM_EXT = {
+ "linux-aarch64": "tar.xz",
+ "linux-x86_64": "tar.xz",
+ "macos-aarch64": "tar.xz",
+ "macos-x86_64": "tar.xz",
+ "windows-x86_64": "zip",
}
def toolchains(
version = _VERSION,
url_formats = [URL_FORMAT_NIGHTLY, URL_FORMAT_JAKSTYS],
- host_platform_sha256 = _HOST_PLATFORM_SHA256):
+ host_platform_sha256 = _HOST_PLATFORM_SHA256,
+ host_platform_ext = _HOST_PLATFORM_EXT):
"""
Download zig toolchain and declare bazel toolchains.
The platforms are not registered automatically, that should be done by
@@ -56,11 +66,13 @@ def toolchains(
version = version,
url_formats = url_formats,
host_platform_sha256 = host_platform_sha256,
+ host_platform_ext = host_platform_ext,
host_platform_include_root = {
"linux-aarch64": "lib/zig/",
"linux-x86_64": "lib/",
"macos-aarch64": "lib/zig/",
"macos-x86_64": "lib/zig/",
+ "windows-x86_64": "lib/",
},
)
@@ -81,6 +93,10 @@ export ZIG_GLOBAL_CACHE_DIR=$ZIG_LOCAL_CACHE_DIR
exec "{zig}" "{zig_tool}" "$@"
"""
+ZIG_TOOL_WRAPPER_WINDOWS = """@echo off
+"{zig}" "{zig_tool}" %*
+"""
+
_ZIG_TOOLS = [
"c++",
"cc",
@@ -103,11 +119,16 @@ def _zig_repository_impl(repository_ctx):
if os.startswith("mac os"):
os = "macos"
+ if os.startswith("windows"):
+ os = "windows"
+
host_platform = "{}-{}".format(os, arch)
zig_include_root = repository_ctx.attr.host_platform_include_root[host_platform]
zig_sha256 = repository_ctx.attr.host_platform_sha256[host_platform]
+ zig_ext = repository_ctx.attr.host_platform_ext[host_platform]
format_vars = {
+ "ext": zig_ext,
"version": repository_ctx.attr.version,
"host_platform": host_platform,
}
@@ -121,12 +142,19 @@ def _zig_repository_impl(repository_ctx):
)
for zig_tool in _ZIG_TOOLS:
- repository_ctx.file(
- ZIG_TOOL_PATH.format(zig_tool = zig_tool),
- ZIG_TOOL_WRAPPER.format(
- zig = str(repository_ctx.path("zig")),
+ zig_tool_wrapper = ZIG_TOOL_WRAPPER.format(
+ zig = str(repository_ctx.path("zig")),
+ zig_tool = zig_tool,
+ )
+ if os == "windows":
+ zig_tool_wrapper = ZIG_TOOL_WRAPPER_WINDOWS.format(
+ zig = str(repository_ctx.path("zig")).replace('/', '\\') + ".exe",
zig_tool = zig_tool,
- ),
+ )
+
+ repository_ctx.file(
+ zig_tool_path(os).format(zig_tool = zig_tool),
+ zig_tool_wrapper,
)
repository_ctx.file(
@@ -157,6 +185,7 @@ def _zig_repository_impl(repository_ctx):
executable = False,
substitutions = {
"{absolute_path}": _quote(str(repository_ctx.path(""))),
+ "{os}": _quote(os),
"{zig_include_root}": _quote(zig_include_root),
},
)
@@ -167,6 +196,7 @@ zig_repository = repository_rule(
"host_platform_sha256": attr.string_dict(),
"url_formats": attr.string_list(allow_empty = False),
"host_platform_include_root": attr.string_dict(),
+ "host_platform_ext": attr.string_dict(),
},
implementation = _zig_repository_impl,
)
@@ -175,9 +205,13 @@ def filegroup(name, **kwargs):
native.filegroup(name = name, **kwargs)
return ":" + name
-def declare_files(zig_include_root):
+def declare_files(os, zig_include_root):
filegroup(name = "empty")
- native.exports_files(["zig"], visibility = ["//visibility:public"])
+ if os == "windows":
+ native.exports_files(["zig.exe"], visibility = ["//visibility:public"])
+ native.alias(name = "zig", actual = ":zig.exe")
+ else:
+ native.exports_files(["zig"], visibility = ["//visibility:public"])
filegroup(name = "lib/std", srcs = native.glob(["lib/std/**"]))
lazy_filegroups = {}
diff --git a/toolchain/private/BUILD.sdk.bazel b/toolchain/private/BUILD.sdk.bazel
index 39a6a93..3e7c23e 100644
--- a/toolchain/private/BUILD.sdk.bazel
+++ b/toolchain/private/BUILD.sdk.bazel
@@ -1,6 +1,7 @@
load("@bazel-zig-cc//toolchain/private:cc_toolchains.bzl", "declare_cc_toolchains")
declare_cc_toolchains(
+ os = {os},
absolute_path = {absolute_path},
zig_include_root = {zig_include_root},
)
diff --git a/toolchain/private/cc_toolchains.bzl b/toolchain/private/cc_toolchains.bzl
index 64e99f1..a0c7da0 100644
--- a/toolchain/private/cc_toolchains.bzl
+++ b/toolchain/private/cc_toolchains.bzl
@@ -1,4 +1,4 @@
-load(":defs.bzl", "DEFAULT_INCLUDE_DIRECTORIES", "ZIG_TOOL_PATH", "target_structs")
+load(":defs.bzl", "DEFAULT_INCLUDE_DIRECTORIES", "zig_tool_path", "target_structs")
load("@bazel-zig-cc//toolchain:zig_toolchain.bzl", "zig_cc_toolchain_config")
DEFAULT_TOOL_PATHS = {
@@ -11,7 +11,7 @@ DEFAULT_TOOL_PATHS = {
"strip": "/usr/bin/false",
}.items()
-def declare_cc_toolchains(absolute_path, zig_include_root):
+def declare_cc_toolchains(os, absolute_path, zig_include_root):
for target_config in target_structs():
gotarget = target_config.gotarget
zigtarget = target_config.zigtarget
@@ -28,7 +28,7 @@ def declare_cc_toolchains(absolute_path, zig_include_root):
if path[0] == "/":
absolute_tool_paths[name] = path
continue
- tool_path = ZIG_TOOL_PATH.format(zig_tool = path)
+ tool_path = zig_tool_path(os).format(zig_tool = path)
absolute_tool_paths[name] = "%s/%s" % (absolute_path, tool_path)
linkopts = target_config.linkopts
diff --git a/toolchain/private/defs.bzl b/toolchain/private/defs.bzl
index 6059065..6804104 100644
--- a/toolchain/private/defs.bzl
+++ b/toolchain/private/defs.bzl
@@ -4,7 +4,7 @@ DEFAULT_INCLUDE_DIRECTORIES = [
"libcxxabi/include",
]
-ZIG_TOOL_PATH = "tools/{zig_tool}"
+_ZIG_TOOL_PATH = "tools/{zig_tool}"
# Zig supports even older glibcs than defined below, but we have tested only
# down to 2.17.
@@ -30,6 +30,12 @@ _GLIBCS = [
LIBCS = ["musl"] + ["gnu.{}".format(glibc) for glibc in _GLIBCS]
+def zig_tool_path(os):
+ if os == "windows":
+ return _ZIG_TOOL_PATH + ".bat"
+ else:
+ return _ZIG_TOOL_PATH
+
def target_structs():
ret = []
for zigcpu, gocpu in (("x86_64", "amd64"), ("aarch64", "arm64")):
--
2.17.1
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From: Fabian Hahn <fabian@hahn.graphics>
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To: ~motiejus/bazel-zig-cc@lists.sr.ht
Cc: Fabian Hahn <fabian@hahn.graphics>
Subject: [PATCH bazel-zig-cc 2/3] added support for Windows targets
Date: Fri, 20 May 2022 16:02:31 +0100
Message-Id: <20220520150232.15515-3-fabian@hahn.graphics>
In-Reply-To: <20220520150232.15515-1-fabian@hahn.graphics>
References: <20220520150232.15515-1-fabian@hahn.graphics>
Status: O
Content-Length: 3082
Lines: 81
---
This commit adds support for Windows targets to bazel-zig-cc by
registering the appropriate toolchains and platforms for it. I've
validated this by building a cc_binary on Linux targeting
the windows_amd64 platform/toolchain combination, copying the resulting
binary to a Windows box and successfully executing it there. I was also
able to run the resulting binary under wine.
One thing to note is that even though cross compilation builds work
completely fine, the resulting build outputs are named .a for static
libraries (instead of .lib), .so for dynamic libraries (instead of
.dll), and have no extension for executables (instead of .exe). I tried
to find out why this is but unfortunately couldn't figure it out. That
said, the resulting binaries work completely fine.
toolchain/platform/defs.bzl | 7 ++++++-
toolchain/private/defs.bzl | 19 +++++++++++++++++++
2 files changed, 25 insertions(+), 1 deletion(-)
diff --git a/toolchain/platform/defs.bzl b/toolchain/platform/defs.bzl
index cf42191..07e69a6 100644
--- a/toolchain/platform/defs.bzl
+++ b/toolchain/platform/defs.bzl
@@ -1,11 +1,16 @@
load("@bazel-zig-cc//toolchain/private:defs.bzl", "LIBCS")
_CPUS = (("x86_64", "amd64"), ("aarch64", "arm64"))
+_OS = {
+ "linux": ["linux"],
+ "macos": ["macos", "darwin"],
+ "windows": ["windows"],
+}
def declare_platforms():
# create @zig_sdk//{os}_{arch}_platform entries with zig and go conventions
for zigcpu, gocpu in _CPUS:
- for bzlos, oss in {"linux": ["linux"], "macos": ["macos", "darwin"]}.items():
+ for bzlos, oss in _OS.items():
for os in oss:
declare_platform(gocpu, zigcpu, bzlos, os)
diff --git a/toolchain/private/defs.bzl b/toolchain/private/defs.bzl
index 6804104..2ba61f7 100644
--- a/toolchain/private/defs.bzl
+++ b/toolchain/private/defs.bzl
@@ -40,6 +40,7 @@ def target_structs():
ret = []
for zigcpu, gocpu in (("x86_64", "amd64"), ("aarch64", "arm64")):
ret.append(_target_darwin(gocpu, zigcpu))
+ ret.append(_target_windows(gocpu, zigcpu))
ret.append(_target_linux_musl(gocpu, zigcpu))
for glibc in _GLIBCS:
ret.append(_target_linux_gnu(gocpu, zigcpu, glibc))
@@ -69,6 +70,24 @@ def _target_darwin(gocpu, zigcpu):
tool_paths = {"ld": "ld64.lld"},
)
+def _target_windows(gocpu, zigcpu):
+ return struct(
+ gotarget = "windows_{}".format(gocpu),
+ zigtarget = "{}-windows-gnu".format(zigcpu),
+ includes = [
+ "libunwind/include",
+ "libc/include/any-windows-any",
+ ],
+ linkopts = [],
+ copts = [],
+ bazel_target_cpu = "x64_windows",
+ constraint_values = [
+ "@platforms//os:windows",
+ "@platforms//cpu:{}".format(zigcpu),
+ ],
+ tool_paths = {"ld": "ld64.lld"},
+ )
+
def _target_linux_gnu(gocpu, zigcpu, glibc_version):
glibc_suffix = "gnu.{}".format(glibc_version)
--
2.17.1
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From: Fabian Hahn <fabian@hahn.graphics>
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To: ~motiejus/bazel-zig-cc@lists.sr.ht
Cc: Fabian Hahn <fabian@hahn.graphics>
Subject: [PATCH bazel-zig-cc 3/3] added platform constraint setting for selecting if zig cc is used
Date: Fri, 20 May 2022 16:02:32 +0100
Message-Id: <20220520150232.15515-4-fabian@hahn.graphics>
In-Reply-To: <20220520150232.15515-1-fabian@hahn.graphics>
References: <20220520150232.15515-1-fabian@hahn.graphics>
Status: O
Content-Length: 2570
Lines: 81
---
This commit adds a constraint_setting that can be used to select()
between builds with and without zig cc. The reason I added this is
because I found that selecting on @bazel_tools//platforms:windows is not
enough for Windows builds since that constraint value alone will match
both native builds using the MSVC compiler as well as builds using zig
cc. The problem arises when passing custom compiler on linker flags that
differ in syntax between MSVC and zig's clang format. For example, to
link the gdi32 system library on Windows MSVC expects the argument
"-DEFAULTLIB:gdi32.lib". However, with zig cc this needs to be "-lgdi32"
instead. Having the additional constraint setting for the bazel-zig-cc
platforms allows you to define more specific config settings such as:
config_setting(
name = "windows",
constraint_values = [
"@bazel_tools//platforms:windows",
"@zig_sdk//platform:zig_cc_disabled",
],
)
config_setting(
name = "windows_zig",
constraint_values = [
"@bazel_tools//platforms:windows",
"@zig_sdk//platform:zig_cc_enabled",
],
)
This can then be used to switch between linker options as follows:
cc_binary(
# [...]
linkopts = select({
":windows": ["-DEFAULTLIB:gdi32.lib"],
":windows_zig": ["-lgdi32"],
}),
)
toolchain/platform/BUILD | 15 +++++++++++++++
toolchain/platform/defs.bzl | 1 +
2 files changed, 16 insertions(+)
diff --git a/toolchain/platform/BUILD b/toolchain/platform/BUILD
index f43b852..807ac3c 100644
--- a/toolchain/platform/BUILD
+++ b/toolchain/platform/BUILD
@@ -4,4 +4,19 @@ package(
default_visibility = ["//visibility:public"],
)
+constraint_setting(
+ name = "using_zig_cc",
+ default_constraint_value = "zig_cc_disabled",
+)
+
+constraint_value(
+ name = "zig_cc_disabled",
+ constraint_setting = "using_zig_cc",
+)
+
+constraint_value(
+ name = "zig_cc_enabled",
+ constraint_setting = "using_zig_cc",
+)
+
declare_platforms()
diff --git a/toolchain/platform/defs.bzl b/toolchain/platform/defs.bzl
index 07e69a6..05c0744 100644
--- a/toolchain/platform/defs.bzl
+++ b/toolchain/platform/defs.bzl
@@ -32,6 +32,7 @@ def declare_platform(gocpu, zigcpu, bzlos, os, suffix = "", extra_constraints =
constraint_values = [
"@platforms//os:{}".format(bzlos),
"@platforms//cpu:{}".format(zigcpu),
+ "@zig_sdk//platform:zig_cc_enabled",
] + extra_constraints
native.platform(
--
2.17.1
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Date: Fri, 20 May 2022 15:16:31 +0000
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bazel-zig-cc/patches/.build.yml: FAILED in 13m9s
[Windows support][0] from [Fabian Hahn][1]
[0]: https://lists.sr.ht/~motiejus/bazel-zig-cc/patches/32423
[1]: mailto:fabian@hahn.graphics
=E2=9C=97 #762646 FAILED bazel-zig-cc/patches/.build.yml https://builds.sr.=
ht/~motiejus/job/762646
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From: Motiejus =?utf-8?Q?Jak=C5=A1tys?= <motiejus@jakstys.lt>
To: Fabian Hahn <fabian@hahn.graphics>, laurynasl@uber.com
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht
Subject: Re: [PATCH bazel-zig-cc 0/3] Windows support
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Hi Fabian,
On Fri, May 20, 2022 at 04:02:29PM +0100, Fabian Hahn wrote:
> Hello there,
>
> First of all, thank you for this great project! I was always intrigued
> by zig's C/C++ compilation abilities but wasn't too keen on adopting it
> as a build system. Being able to use zig as a bazel toolchain using this
> project is incredible and exactly the way I always wanted to use zig.
>
> My intended use case for bazel-zig-cc was to enable cross compilation
> between the two supported platforms Linux and Windows in my project [1].
> To this end, I started looking into extending bazel-zig-cc with Windows
> support both as a host and target system.
Happy to see you are finding it useful!
> The attached three commits in
> made this work and successfully allowed me to cross compile all of my
> cc_binary targets between Linux and Windows using zig cc. That said,
> they do not actually depend on each other and can be used individually.
> I hope others might find them useful, too, and would like to ask you to
> consider accepting them into the mainline of the project.
>
> [1] https://github.com/FabianHahn/shoveler
I don't mind Windows support, as long as there is somebody to
test and maintain it. Once we land this, that will be you. :)
Since none of the bazel-zig-cc contributors are using Windows for
development, we don't have means to test if we did not break something.
So, until we can have a Windows CI, you will be on the hook to test it
with new bazel-zig-cc releases.
And until we are no sr.ht, there is no chance we will have Windows CI.
Unless it can be run under Wine? Do you have appetite to try?
Now regarding your patches:
> Fabian Hahn (3):
> added windows host support
> added support for Windows targets
The above look reasonable.
> added platform constraint setting for selecting if zig cc is used
I am not sure about this. Laurynai, can you have a peek if this can't be
expressed via a platform instead? This setting doesn't look right from a
quick glimpse.
Motiejus
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References: <20220520150232.15515-1-fabian@hahn.graphics> <20220520150232.15515-4-fabian@hahn.graphics>
In-Reply-To: <20220520150232.15515-4-fabian@hahn.graphics>
From: Laurynas Lubys <laurynasl@uber.com>
Date: Mon, 23 May 2022 19:06:16 +0300
Message-ID: <CAG09j49GZxNQJJZX5a5wZ0f12VPzfWqbLmzEfTKfS4KvwvwPtg@mail.gmail.com>
Subject: Re: [PATCH bazel-zig-cc 3/3] added platform constraint setting for
selecting if zig cc is used
To: Fabian Hahn <fabian@hahn.graphics>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht
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Hi Fabian,
While I see your use case, I think the solution you outlined is a bit
too invasive for the problem you raised. I would prefer bazel-zig-cc
to only deal with terms related to zig-cc and not other compilers.
Here's how you could solve this bit without changes in bazel-zig-cc:
1. Define the `constraint_value`s in your project
2. Define a custom platform (e.g. windows_msvc and windows_zig),
specifying the bazel-zig-cc platform in the `parents` field and adding
the `constraint_values` from step 1 accordingly.
3. Use your custom platforms instead of the ones from bazel-zig-cc directly.
Cheers,
Laurynas
On Fri, May 20, 2022 at 6:03 PM Fabian Hahn <fabian@hahn.graphics> wrote:
>
> ---
> This commit adds a constraint_setting that can be used to select()
> between builds with and without zig cc. The reason I added this is
> because I found that selecting on @bazel_tools//platforms:windows is not
> enough for Windows builds since that constraint value alone will match
> both native builds using the MSVC compiler as well as builds using zig
> cc. The problem arises when passing custom compiler on linker flags that
> differ in syntax between MSVC and zig's clang format. For example, to
> link the gdi32 system library on Windows MSVC expects the argument
> "-DEFAULTLIB:gdi32.lib". However, with zig cc this needs to be "-lgdi32"
> instead. Having the additional constraint setting for the bazel-zig-cc
> platforms allows you to define more specific config settings such as:
>
> config_setting(
> name = "windows",
> constraint_values = [
> "@bazel_tools//platforms:windows",
> "@zig_sdk//platform:zig_cc_disabled",
> ],
> )
>
> config_setting(
> name = "windows_zig",
> constraint_values = [
> "@bazel_tools//platforms:windows",
> "@zig_sdk//platform:zig_cc_enabled",
> ],
> )
>
> This can then be used to switch between linker options as follows:
> cc_binary(
> # [...]
> linkopts = select({
> ":windows": ["-DEFAULTLIB:gdi32.lib"],
> ":windows_zig": ["-lgdi32"],
> }),
> )
>
> toolchain/platform/BUILD | 15 +++++++++++++++
> toolchain/platform/defs.bzl | 1 +
> 2 files changed, 16 insertions(+)
>
> diff --git a/toolchain/platform/BUILD b/toolchain/platform/BUILD
> index f43b852..807ac3c 100644
> --- a/toolchain/platform/BUILD
> +++ b/toolchain/platform/BUILD
> @@ -4,4 +4,19 @@ package(
> default_visibility = ["//visibility:public"],
> )
>
> +constraint_setting(
> + name = "using_zig_cc",
> + default_constraint_value = "zig_cc_disabled",
> +)
> +
> +constraint_value(
> + name = "zig_cc_disabled",
> + constraint_setting = "using_zig_cc",
> +)
> +
> +constraint_value(
> + name = "zig_cc_enabled",
> + constraint_setting = "using_zig_cc",
> +)
> +
> declare_platforms()
> diff --git a/toolchain/platform/defs.bzl b/toolchain/platform/defs.bzl
> index 07e69a6..05c0744 100644
> --- a/toolchain/platform/defs.bzl
> +++ b/toolchain/platform/defs.bzl
> @@ -32,6 +32,7 @@ def declare_platform(gocpu, zigcpu, bzlos, os, suffix = "", extra_constraints =
> constraint_values = [
> "@platforms//os:{}".format(bzlos),
> "@platforms//cpu:{}".format(zigcpu),
> + "@zig_sdk//platform:zig_cc_enabled",
> ] + extra_constraints
>
> native.platform(
> --
> 2.17.1
>
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Date: Mon, 23 May 2022 20:25:05 +0100
From: fabian@hahn.graphics
To: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Cc: laurynasl@uber.com, ~motiejus/bazel-zig-cc@lists.sr.ht, =?UTF-8?Q?Mot?=
=?UTF-8?Q?iejus_Jak=C5=A1tys?= <desired.mta@gmail.com>
Subject: Re: [PATCH bazel-zig-cc 0/3] Windows support
In-Reply-To: <20220521125628.dqwgp3p6m6n76jdl@mtpad.i.jakstys.lt>
References: <20220520150232.15515-1-fabian@hahn.graphics>
<20220521125628.dqwgp3p6m6n76jdl@mtpad.i.jakstys.lt>
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Hi Motiejus,
On 2022-05-21 13:56, Motiejus Jakštys wrote:
> I don't mind Windows support, as long as there is somebody to
> test and maintain it. Once we land this, that will be you. :)
>
> Since none of the bazel-zig-cc contributors are using Windows for
> development, we don't have means to test if we did not break something.
> So, until we can have a Windows CI, you will be on the hook to test it
> with new bazel-zig-cc releases.
I'm happy to try doing this. I'm definitely interested in keeping my own
project up to date with new releases of the rules too, which should
provide some implicit coverage.
> And until we are no sr.ht, there is no chance we will have Windows CI.
> Unless it can be run under Wine? Do you have appetite to try?
I will look into this. I'm pretty confident that the Windows target
support (second patch) can be covered by wine testing. I'm more
sceptical
about Windows host support, since you'd have to run Windows bazel itself
under Wine which I'm not sure is supported and might not work.
> I am not sure about this. Laurynai, can you have a peek if this can't
> be
> expressed via a platform instead? This setting doesn't look right from
> a
> quick glimpse.
I'll look into Laurynai's suggestion of using a custom platform for
this.
I'm by no means a bazel expert so this patch was the best I could get
working, and I'm very happy to try a better solution if there is one.
I'll submit a second version of the patch set once I've done this. There
is also a linter failure that I'm going to address.
Best,
Fabian
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Date: Mon, 23 May 2022 20:28:32 +0100
From: fabian@hahn.graphics
To: Laurynas Lubys <laurynasl@uber.com>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht
Subject: Re: [PATCH bazel-zig-cc 3/3] added platform constraint setting for
selecting if zig cc is used
In-Reply-To: <CAG09j49GZxNQJJZX5a5wZ0f12VPzfWqbLmzEfTKfS4KvwvwPtg@mail.gmail.com>
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<20220520150232.15515-4-fabian@hahn.graphics>
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Hi Laurynas,
On 2022-05-23 17:06, Laurynas Lubys wrote:
> Here's how you could solve this bit without changes in bazel-zig-cc:
> 1. Define the `constraint_value`s in your project
> 2. Define a custom platform (e.g. windows_msvc and windows_zig),
> specifying the bazel-zig-cc platform in the `parents` field and adding
> the `constraint_values` from step 1 accordingly.
> 3. Use your custom platforms instead of the ones from bazel-zig-cc
> directly.
Thanks a lot for the pointers, I didn't realize that defining a custom
platform could help here. I'll try this.
Best,
Fabian
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From: Motiejus =?utf-8?Q?Jak=C5=A1tys?= <motiejus@jakstys.lt>
To: fabian@hahn.graphics
Cc: laurynasl@uber.com, ~motiejus/bazel-zig-cc@lists.sr.ht
Subject: Re: [PATCH bazel-zig-cc 0/3] Windows support
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On Mon, May 23, 2022 at 08:25:05PM +0100, fabian@hahn.graphics wrote:
> Hi Motiejus,
>
> On 2022-05-21 13:56, Motiejus Jakštys wrote:
> > And until we are no sr.ht, there is no chance we will have Windows CI.
> > Unless it can be run under Wine? Do you have appetite to try?
>
> I will look into this. I'm pretty confident that the Windows target
> support (second patch) can be covered by wine testing. I'm more sceptical
> about Windows host support, since you'd have to run Windows bazel itself
> under Wine which I'm not sure is supported and might not work.
Out of curiosity I applied your patches, downloaded bazelisk.exe, and
tried to run it via wine, to be greeted with:
$ wine ./bin/bazelisk.exe query ...
ERROR: SymlinkDirectories(C:/users/motiejus/_bazel_motiejus/install/5f8090d9a86a5bdc9afbbd92e4f1b167,
c:\users\motiejus\_bazel_motiejus\n3lawf4n\install): CreateJunction:
FATAL: failed to create installation symlink 'c:\users\motiejus\_bazel_motiejus\n3lawf4n\install': success
... And no obvious suggestions from my favorite search engine.
At least we tried. :)
Motiejus
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Wed, 25 May 2022 01:41:49 +0000 (UTC)
From: ~jvolkman <jvolkman@git.sr.ht>
Date: Wed, 25 May 2022 01:41:49 +0000
Subject: [PATCH bazel-zig-cc 0/2] Ignore undefined symbols when building
dynamic libraries on darwin
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Hi,
I'm working on a rule set to build Python modules using bazel cc
toolchains, and found that with bazel-zig-cc, I'm unable to build native
modules on macos. The issue turns out to be differences in handling
undefined symbols at link time in linux vs. macos. When building for a
linux target, zig ignores undefined symbols, but for macos they generate
errors. In the case of Python, native modules never link against
libpython. Instead, its symbols are provided when the module is loaded
by the cpython interpreter (at least that's my understanding).
See some discussion of this at
https://github.com/ziglang/zig/issues/8180.
This change adds dynamic_library_linkopts to zig_cc_toolchain_config
which apply only to the cpp_link_dynamic_library and
cpp_link_nodeps_dynamic_library. For darwin targets, I specify the
-Wl,-undefined=3Ddynamic_lookup flag. This logic is adapted from bazel's
built-in macos toolchain [1].
Thanks!
[1]
https://cs.github.com/bazelbuild/bazel/blob/ca40a514b8bc609478f769194909dd0be=
0afa1f9/tools/osx/crosstool/cc_toolchain_config.bzl#L1125-L1131
Jeremy Volkman (2):
Adds dynamic_library_linkopts to zig_cc_toolchain_config
Pass "-Wl,-undefined=3Ddynamic_lookup" for dynamic libraries on darwin.
toolchain/private/cc_toolchains.bzl | 2 ++
toolchain/private/defs.bzl | 3 +++
toolchain/zig_toolchain.bzl | 17 ++++++++++++++---
3 files changed, 19 insertions(+), 3 deletions(-)
--=20
2.34.2
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From: ~jvolkman <jvolkman@git.sr.ht>
Date: Tue, 24 May 2022 17:14:35 -0700
Subject: [PATCH bazel-zig-cc 1/2] Adds dynamic_library_linkopts to
zig_cc_toolchain_config
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From: Jeremy Volkman <jeremy@jvolkman.com>
If specified, the flags in dynamic_library_linkopts are included in
cpp_link_dynamic_library and cpp_link_nodeps_dynamic_library actions.
---
toolchain/private/cc_toolchains.bzl | 2 ++
toolchain/private/defs.bzl | 3 +++
toolchain/zig_toolchain.bzl | 17 ++++++++++++++---
3 files changed, 19 insertions(+), 3 deletions(-)
diff --git a/toolchain/private/cc_toolchains.bzl b/toolchain/private/cc_toolc=
hains.bzl
index 64e99f1..3a1e1cb 100644
--- a/toolchain/private/cc_toolchains.bzl
+++ b/toolchain/private/cc_toolchains.bzl
@@ -32,6 +32,7 @@ def declare_cc_toolchains(absolute_path, zig_include_root):
absolute_tool_paths[name] =3D "%s/%s" % (absolute_path, tool_pat=
h)
=20
linkopts =3D target_config.linkopts
+ dynamic_library_linkopts =3D target_config.dynamic_library_linkopts
copts =3D target_config.copts
for s in getattr(target_config, "linker_version_scripts", []):
linkopts =3D linkopts + ["-Wl,--version-script,%s/%s" % (absolut=
e_path, s)]
@@ -45,6 +46,7 @@ def declare_cc_toolchains(absolute_path, zig_include_root):
cxx_builtin_include_directories =3D cxx_builtin_include_director=
ies,
copts =3D copts,
linkopts =3D linkopts,
+ dynamic_library_linkopts =3D dynamic_library_linkopts,
target_cpu =3D target_config.bazel_target_cpu,
target_system_name =3D "unknown",
target_libc =3D "unknown",
diff --git a/toolchain/private/defs.bzl b/toolchain/private/defs.bzl
index 6059065..053641c 100644
--- a/toolchain/private/defs.bzl
+++ b/toolchain/private/defs.bzl
@@ -54,6 +54,7 @@ def _target_darwin(gocpu, zigcpu):
"libc/include/any-macos-any",
],
linkopts =3D [],
+ dynamic_library_linkopts =3D [],
copts =3D [],
bazel_target_cpu =3D "darwin",
constraint_values =3D [
@@ -84,6 +85,7 @@ def _target_linux_gnu(gocpu, zigcpu, glibc_version):
compiler_extra_includes =3D ["glibc-hacks/glibchack-fcntl.h"] if fcn=
tl_hack else [],
linker_version_scripts =3D ["glibc-hacks/fcntl.map"] if fcntl_hack e=
lse [],
linkopts =3D ["-lc++", "-lc++abi"],
+ dynamic_library_linkopts =3D [],
copts =3D [],
bazel_target_cpu =3D "k8",
constraint_values =3D [
@@ -105,6 +107,7 @@ def _target_linux_musl(gocpu, zigcpu):
"libc/include/{}-linux-any".format(zigcpu),
] + (["libc/include/x86-linux-any"] if zigcpu =3D=3D "x86_64" else [=
]),
linkopts =3D ["-s", "-w"],
+ dynamic_library_linkopts =3D [],
copts =3D ["-D_LIBCPP_HAS_MUSL_LIBC", "-D_LIBCPP_HAS_THREAD_API_PTHR=
EAD"],
bazel_target_cpu =3D "k8",
constraint_values =3D [
diff --git a/toolchain/zig_toolchain.bzl b/toolchain/zig_toolchain.bzl
index aa14ec1..8676471 100644
--- a/toolchain/zig_toolchain.bzl
+++ b/toolchain/zig_toolchain.bzl
@@ -14,6 +14,11 @@ all_link_actions =3D [
ACTION_NAMES.cpp_link_nodeps_dynamic_library,
]
=20
+dynamic_library_link_actions =3D [
+ ACTION_NAMES.cpp_link_dynamic_library,
+ ACTION_NAMES.cpp_link_nodeps_dynamic_library,
+]
+
compile_and_link_actions =3D [
ACTION_NAMES.c_compile,
ACTION_NAMES.cpp_compile,
@@ -79,15 +84,20 @@ def _zig_cc_toolchain_config_impl(ctx):
flag_sets =3D [
flag_set(
actions =3D all_link_actions,
- flag_groups =3D ([
+ flag_groups =3D [
flag_group(
flags =3D ["-target", ctx.attr.target] +
no_gc_sections +
ctx.attr.linkopts,
),
- ]),
+ ],
),
- ],
+ ] + [
+ flag_set(
+ actions =3D dynamic_library_link_actions,
+ flag_groups =3D [flag_group(flags =3D ctx.attr.dynamic_libra=
ry_linkopts)],
+ ),
+ ] if ctx.attr.dynamic_library_linkopts else [],
)
=20
features =3D [
@@ -119,6 +129,7 @@ zig_cc_toolchain_config =3D rule(
attrs =3D {
"cxx_builtin_include_directories": attr.string_list(),
"linkopts": attr.string_list(),
+ "dynamic_library_linkopts": attr.string_list(),
"copts": attr.string_list(),
"tool_paths": attr.string_dict(),
"target": attr.string(),
--=20
2.34.2
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From: ~jvolkman <jvolkman@git.sr.ht>
Date: Tue, 24 May 2022 17:17:33 -0700
Subject: [PATCH bazel-zig-cc 2/2] Pass "-Wl,-undefined=dynamic_lookup" for
dynamic libraries on darwin.
Message-ID: <165344290967.21743.14923213680999840378-2@git.sr.ht>
X-Mailer: git.sr.ht
Reply-to: ~jvolkman <jeremy@jvolkman.com>
In-Reply-To: <165344290967.21743.14923213680999840378-0@git.sr.ht>
To: ~motiejus/bazel-zig-cc@lists.sr.ht
Cc: jeremy@jvolkman.com
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From: Jeremy Volkman <jeremy@jvolkman.com>
This linker flag causes undefined symbols to be ignored, which is the
default behavior on linux but not macos. This is required when building
shared libraries to use as e.g. Python modules. This also matches what
Bazel's built-in macos cc toolchain does.
---
toolchain/private/defs.bzl | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/toolchain/private/defs.bzl b/toolchain/private/defs.bzl
index 053641c..42aaaeb 100644
--- a/toolchain/private/defs.bzl
+++ b/toolchain/private/defs.bzl
@@ -54,7 +54,7 @@ def _target_darwin(gocpu, zigcpu):
"libc/include/any-macos-any",
],
linkopts = [],
- dynamic_library_linkopts = [],
+ dynamic_library_linkopts = ["-Wl,-undefined=dynamic_lookup"],
copts = [],
bazel_target_cpu = "darwin",
constraint_values = [
--
2.34.2
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Subject: [bazel-zig-cc/patches/.build.yml] build failed
To: "~jvolkman" <jeremy@jvolkman.com>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht
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bazel-zig-cc/patches/.build.yml: FAILED in 3m12s
[Ignore undefined symbols when building dynamic libraries on darwin][0] fro=
m [~jvolkman][1]
[0]: https://lists.sr.ht/~motiejus/bazel-zig-cc/patches/32501
[1]: mailto:jeremy@jvolkman.com
=E2=9C=97 #765889 FAILED bazel-zig-cc/patches/.build.yml https://builds.sr.=
ht/~motiejus/job/765889
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From: Motiejus =?utf-8?Q?Jak=C5=A1tys?= <motiejus@jakstys.lt>
To: ~jvolkman <jeremy@jvolkman.com>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht
Subject: Re: [PATCH bazel-zig-cc 0/2] Ignore undefined symbols when building
dynamic libraries on darwin
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On Wed, May 25, 2022 at 01:41:49AM +0000, ~jvolkman wrote:
> Hi,
>
> I'm working on a rule set to build Python modules using bazel cc
> toolchains, and found that with bazel-zig-cc, I'm unable to build native
> modules on macos. The issue turns out to be differences in handling
> undefined symbols at link time in linux vs. macos. When building for a
> linux target, zig ignores undefined symbols, but for macos they generate
> errors. In the case of Python, native modules never link against
> libpython. Instead, its symbols are provided when the module is loaded
> by the cpython interpreter (at least that's my understanding).
>
> See some discussion of this at
> https://github.com/ziglang/zig/issues/8180.
>
> This change adds dynamic_library_linkopts to zig_cc_toolchain_config
> which apply only to the cpp_link_dynamic_library and
> cpp_link_nodeps_dynamic_library. For darwin targets, I specify the
> -Wl,-undefined=dynamic_lookup flag. This logic is adapted from bazel's
> built-in macos toolchain [1].
>
> Thanks!
>
> [1]
> https://cs.github.com/bazelbuild/bazel/blob/ca40a514b8bc609478f769194909dd0be0afa1f9/tools/osx/crosstool/cc_toolchain_config.bzl#L1125-L1131
>
> Jeremy Volkman (2):
> Adds dynamic_library_linkopts to zig_cc_toolchain_config
> Pass "-Wl,-undefined=dynamic_lookup" for dynamic libraries on darwin.
Hi Jeremy,
looks like the patch broke ELF[1] on x86_64. Thus I did not reach your
patch carefully. Please let me know when I should take action.
Motiejus
[1]: https://builds.sr.ht/~motiejus/job/765889
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To: ~motiejus/bazel-zig-cc@lists.sr.ht
Cc: Fabian Hahn <fabian@hahn.graphics>
Subject: [PATCH bazel-zig-cc v2 0/3] Windows support
Date: Sun, 29 May 2022 17:35:15 +0100
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Hello,
Second version of my patchset adding Windows support to bazel-zig-cc.
Changelog compared to v1:
- fixed lint failures
- dropped patch to add extra platform constraint settings
- added patch to add testing for Windows target using wine-binfmt
- added README.md entries explaining Windows support
I hope it passes CI, but I do not know how to trigger it other than
sending you a second patch version. In case of further failures, I
will of course look into fixing them. Please let me know if anything
looks like it is missing :)
Best,
Fabian
Fabian Hahn (3):
added Windows host support
added support for Windows targets
added Windows target testing
.build.yml | 1 +
README.md | 25 ++++++++++++-
WORKSPACE | 4 +-
ci/test | 14 ++++++-
test/c/BUILD | 24 +++++++++++-
test/c/main_winver.c | 16 ++++++++
toolchain/BUILD.sdk.bazel | 1 +
toolchain/defs.bzl | 58 +++++++++++++++++++++++------
toolchain/platform/defs.bzl | 7 +++-
toolchain/private/BUILD.sdk.bazel | 1 +
toolchain/private/cc_toolchains.bzl | 6 +--
toolchain/private/defs.bzl | 27 +++++++++++++-
12 files changed, 161 insertions(+), 23 deletions(-)
create mode 100644 test/c/main_winver.c
--
2.25.1
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To: ~motiejus/bazel-zig-cc@lists.sr.ht
Cc: Fabian Hahn <fabian@hahn.graphics>
Subject: [PATCH bazel-zig-cc v2 3/3] added Windows target testing
Date: Sun, 29 May 2022 17:35:18 +0100
Message-Id: <20220529163518.182119-4-fabian@hahn.graphics>
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---
.build.yml | 1 +
README.md | 10 ++++++++--
WORKSPACE | 4 +++-
ci/test | 14 ++++++++++++--
test/c/BUILD | 24 +++++++++++++++++++++++-
test/c/main_winver.c | 16 ++++++++++++++++
6 files changed, 63 insertions(+), 6 deletions(-)
create mode 100644 test/c/main_winver.c
diff --git a/.build.yml b/.build.yml
index 6aeec50..c9cbfa0 100644
--- a/.build.yml
+++ b/.build.yml
@@ -5,6 +5,7 @@ packages:
- qemu-user-static
- binfmt-support
- moreutils
+ - wine-binfmt
sources:
- https://git.sr.ht/~motiejus/bazel-zig-cc
environment:
diff --git a/README.md b/README.md
index e6fd5e2..7a86ced 100644
--- a/README.md
+++ b/README.md
@@ -401,8 +401,9 @@ This repository is used on the following (host) platforms:
- `windows_amd64`, a.k.a. `x64`.
The tests are running (CId) on linux-amd64, and are assuming the kernel is
-configured to run arm64 binaries. There are two reasonably convenient ways to
-configure arm64 emulation:
+configured to run `linux_arm64` and `windows_amd64` binaries.
+
+There are two reasonably convenient ways to configure `linux_arm64` emulation:
1. Install and configure [`binfmt_misc`][binfmt_misc]:
```
@@ -414,6 +415,11 @@ configure arm64 emulation:
docker run --rm --privileged multiarch/qemu-user-static --reset -p yes
```
+In order to install and configure `windows_amd64` emulation:
+```
+apt install wine-binfmt
+```
+
## Transient docker environment
A standalone Docker environment to play with bazel-zig-cc:
diff --git a/WORKSPACE b/WORKSPACE
index eff4a8f..c1b3c0f 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -51,11 +51,13 @@ zig_toolchains()
register_toolchains(
# if no `--platform` is specified, these toolchains will be used for
- # (linux,darwin)x(amd64,arm64)
+ # (linux,darwin,windows)x(amd64,arm64)
"@zig_sdk//toolchain:linux_amd64_gnu.2.19",
"@zig_sdk//toolchain:linux_arm64_gnu.2.28",
"@zig_sdk//toolchain:darwin_amd64",
"@zig_sdk//toolchain:darwin_arm64",
+ "@zig_sdk//toolchain:windows_amd64",
+ "@zig_sdk//toolchain:windows_arm64",
# amd64 toolchains for libc-aware platforms:
"@zig_sdk//libc_aware/toolchain:linux_amd64_gnu.2.19",
diff --git a/ci/test b/ci/test
index debdc0b..1ba6285 100755
--- a/ci/test
+++ b/ci/test
@@ -1,3 +1,13 @@
-#!/bin/sh
+#!/bin/bash
+set -euo pipefail
-exec bazel test ...
+bazel test ...
+
+# Windows tests
+# Unfortunately wine-binfmt breaks within the bazel sandbox, so we disable it
+# to run this test.
+bazel test //test/c:winver_windows_amd64 \
+ --spawn_strategy=standalone
+# There is no no easy way to run windows_arm64 binaries on Linux, so we just
+# cross compile one for testing.
+bazel build //test/c:winver_windows_arm64
diff --git a/test/c/BUILD b/test/c/BUILD
index 99e36c4..698c798 100644
--- a/test/c/BUILD
+++ b/test/c/BUILD
@@ -1,4 +1,4 @@
-load("@bazel-zig-cc//rules:platform.bzl", "platform_binary")
+load("@bazel-zig-cc//rules:platform.bzl", "platform_binary", "platform_test")
cc_binary(
name = "which_libc",
@@ -34,3 +34,25 @@ cc_binary(
("linux_arm64", "//platform:linux_arm64", "glibc_2.28"),
]
]
+
+cc_binary(
+ name = "winver",
+ srcs = ["main_winver.c"],
+ target_compatible_with = [
+ "@platforms//os:windows",
+ ],
+)
+
+platform_test(
+ name = "winver_windows_amd64",
+ src = "winver",
+ platform = "//platform:windows_amd64",
+ tags = ["manual"],
+)
+
+platform_binary(
+ name = "winver_windows_arm64",
+ src = "winver",
+ platform = "//platform:windows_arm64",
+ tags = ["manual"],
+)
diff --git a/test/c/main_winver.c b/test/c/main_winver.c
new file mode 100644
index 0000000..b5302af
--- /dev/null
+++ b/test/c/main_winver.c
@@ -0,0 +1,16 @@
+#include <stdio.h>
+#include <windows.h>
+
+int main() {
+ DWORD version = GetVersion();
+ DWORD majorVersion = (DWORD)(LOBYTE(LOWORD(version)));
+ DWORD minorVersion = (DWORD)(HIBYTE(LOWORD(version)));
+
+ DWORD build = 0;
+ if (version < 0x80000000) {
+ build = (DWORD)(HIWORD(version));
+ }
+
+ printf("Running Windows version %d.%d (%d).\n", majorVersion, minorVersion, build);
+ return 0;
+}
--
2.25.1
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To: ~motiejus/bazel-zig-cc@lists.sr.ht
Cc: Fabian Hahn <fabian@hahn.graphics>
Subject: [PATCH bazel-zig-cc v2 1/3] added Windows host support
Date: Sun, 29 May 2022 17:35:16 +0100
Message-Id: <20220529163518.182119-2-fabian@hahn.graphics>
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---
README.md | 1 +
toolchain/BUILD.sdk.bazel | 1 +
toolchain/defs.bzl | 58 +++++++++++++++++++++++------
toolchain/private/BUILD.sdk.bazel | 1 +
toolchain/private/cc_toolchains.bzl | 6 +--
toolchain/private/defs.bzl | 8 +++-
6 files changed, 59 insertions(+), 16 deletions(-)
diff --git a/README.md b/README.md
index bbbd5bc..b092ae0 100644
--- a/README.md
+++ b/README.md
@@ -384,6 +384,7 @@ This repository is used on the following (host) platforms:
- `linux_arm64`, a.k.a. `AArch64`.
- `darwin_amd64`, the 64-bit post-PowerPC models.
- `darwin_arm64`, the M1.
+- `windows_amd64`, a.k.a. `x64`.
The tests are running (CId) on linux-amd64, and are assuming the kernel is
configured to run arm64 binaries. There are two reasonably convenient ways to
diff --git a/toolchain/BUILD.sdk.bazel b/toolchain/BUILD.sdk.bazel
index ada3e5d..e1505b1 100644
--- a/toolchain/BUILD.sdk.bazel
+++ b/toolchain/BUILD.sdk.bazel
@@ -7,6 +7,7 @@ package(
declare_files(
+ os = {os},
zig_include_root = {zig_include_root},
)
diff --git a/toolchain/defs.bzl b/toolchain/defs.bzl
index 9ab4e88..df2441d 100644
--- a/toolchain/defs.bzl
+++ b/toolchain/defs.bzl
@@ -1,6 +1,6 @@
load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
load("@bazel_tools//tools/build_defs/repo:utils.bzl", "read_user_netrc", "use_netrc")
-load("@bazel-zig-cc//toolchain/private:defs.bzl", "DEFAULT_INCLUDE_DIRECTORIES", "ZIG_TOOL_PATH", "target_structs")
+load("@bazel-zig-cc//toolchain/private:defs.bzl", "DEFAULT_INCLUDE_DIRECTORIES", "target_structs", "zig_tool_path")
_fcntl_map = """
GLIBC_2.2.5 {
@@ -16,21 +16,21 @@ __asm__(".symver fcntl64, fcntl@GLIBC_2.2.5");
"""
# Official recommended version. Should use this when we have a usable release.
-URL_FORMAT_RELEASE = "https://ziglang.org/download/{version}/zig-{host_platform}-{version}.tar.xz"
+URL_FORMAT_RELEASE = "https://ziglang.org/download/{version}/zig-{host_platform}-{version}.{ext}"
# Caution: nightly releases are purged from ziglang.org after ~90 days. A real
# solution would be to allow the downstream project specify their own mirrors.
# This is explained in
# https://sr.ht/~motiejus/bazel-zig-cc/#alternative-download-urls and is
# awaiting my attention or your contribution.
-URL_FORMAT_NIGHTLY = "https://ziglang.org/builds/zig-{host_platform}-{version}.tar.xz"
+URL_FORMAT_NIGHTLY = "https://ziglang.org/builds/zig-{host_platform}-{version}.{ext}"
# Author's mirror that doesn't purge the nightlies so aggressively. I will be
# cleaning those up manually only after the artifacts are not in use for many
# months in bazel-zig-cc. dl.jakstys.lt is a small x86_64 server with an NVMe
# drive sitting in my home closet on a 1GB/s symmetric residential connection,
# which, as of writing, has been quite reliable.
-URL_FORMAT_JAKSTYS = "https://dl.jakstys.lt/zig/zig-{host_platform}-{version}.tar.xz"
+URL_FORMAT_JAKSTYS = "https://dl.jakstys.lt/zig/zig-{host_platform}-{version}.{ext}"
_VERSION = "0.10.0-dev.2252+a4369918b"
@@ -39,12 +39,22 @@ _HOST_PLATFORM_SHA256 = {
"linux-x86_64": "1d3c3769eba85a4334c93a3cfa35ad0ef914dd8cf9fd502802004c6908f5370c",
"macos-aarch64": "ab46e7499e5bd7b6d6ff2ac331e1a4aa875a01b270dc40306bc29dbaf216fccf",
"macos-x86_64": "fb213f996bcab805839e401292c42a92b63cd97deb1631e31bd61f534b7f6b1c",
+ "windows-x86_64": "14e43a64026512161f3d6201d8972a28f0508da2782c16e980f2ffa3bb7e6720",
+}
+
+_HOST_PLATFORM_EXT = {
+ "linux-aarch64": "tar.xz",
+ "linux-x86_64": "tar.xz",
+ "macos-aarch64": "tar.xz",
+ "macos-x86_64": "tar.xz",
+ "windows-x86_64": "zip",
}
def toolchains(
version = _VERSION,
url_formats = [URL_FORMAT_NIGHTLY, URL_FORMAT_JAKSTYS],
- host_platform_sha256 = _HOST_PLATFORM_SHA256):
+ host_platform_sha256 = _HOST_PLATFORM_SHA256,
+ host_platform_ext = _HOST_PLATFORM_EXT):
"""
Download zig toolchain and declare bazel toolchains.
The platforms are not registered automatically, that should be done by
@@ -56,11 +66,13 @@ def toolchains(
version = version,
url_formats = url_formats,
host_platform_sha256 = host_platform_sha256,
+ host_platform_ext = host_platform_ext,
host_platform_include_root = {
"linux-aarch64": "lib/zig/",
"linux-x86_64": "lib/",
"macos-aarch64": "lib/zig/",
"macos-x86_64": "lib/zig/",
+ "windows-x86_64": "lib/",
},
)
@@ -81,6 +93,10 @@ export ZIG_GLOBAL_CACHE_DIR=$ZIG_LOCAL_CACHE_DIR
exec "{zig}" "{zig_tool}" "$@"
"""
+ZIG_TOOL_WRAPPER_WINDOWS = """@echo off
+"{zig}" "{zig_tool}" %*
+"""
+
_ZIG_TOOLS = [
"c++",
"cc",
@@ -103,11 +119,16 @@ def _zig_repository_impl(repository_ctx):
if os.startswith("mac os"):
os = "macos"
+ if os.startswith("windows"):
+ os = "windows"
+
host_platform = "{}-{}".format(os, arch)
zig_include_root = repository_ctx.attr.host_platform_include_root[host_platform]
zig_sha256 = repository_ctx.attr.host_platform_sha256[host_platform]
+ zig_ext = repository_ctx.attr.host_platform_ext[host_platform]
format_vars = {
+ "ext": zig_ext,
"version": repository_ctx.attr.version,
"host_platform": host_platform,
}
@@ -121,12 +142,19 @@ def _zig_repository_impl(repository_ctx):
)
for zig_tool in _ZIG_TOOLS:
- repository_ctx.file(
- ZIG_TOOL_PATH.format(zig_tool = zig_tool),
- ZIG_TOOL_WRAPPER.format(
- zig = str(repository_ctx.path("zig")),
+ zig_tool_wrapper = ZIG_TOOL_WRAPPER.format(
+ zig = str(repository_ctx.path("zig")),
+ zig_tool = zig_tool,
+ )
+ if os == "windows":
+ zig_tool_wrapper = ZIG_TOOL_WRAPPER_WINDOWS.format(
+ zig = str(repository_ctx.path("zig")).replace("/", "\\") + ".exe",
zig_tool = zig_tool,
- ),
+ )
+
+ repository_ctx.file(
+ zig_tool_path(os).format(zig_tool = zig_tool),
+ zig_tool_wrapper,
)
repository_ctx.file(
@@ -157,6 +185,7 @@ def _zig_repository_impl(repository_ctx):
executable = False,
substitutions = {
"{absolute_path}": _quote(str(repository_ctx.path(""))),
+ "{os}": _quote(os),
"{zig_include_root}": _quote(zig_include_root),
},
)
@@ -167,6 +196,7 @@ zig_repository = repository_rule(
"host_platform_sha256": attr.string_dict(),
"url_formats": attr.string_list(allow_empty = False),
"host_platform_include_root": attr.string_dict(),
+ "host_platform_ext": attr.string_dict(),
},
implementation = _zig_repository_impl,
)
@@ -175,9 +205,13 @@ def filegroup(name, **kwargs):
native.filegroup(name = name, **kwargs)
return ":" + name
-def declare_files(zig_include_root):
+def declare_files(os, zig_include_root):
filegroup(name = "empty")
- native.exports_files(["zig"], visibility = ["//visibility:public"])
+ if os == "windows":
+ native.exports_files(["zig.exe"], visibility = ["//visibility:public"])
+ native.alias(name = "zig", actual = ":zig.exe")
+ else:
+ native.exports_files(["zig"], visibility = ["//visibility:public"])
filegroup(name = "lib/std", srcs = native.glob(["lib/std/**"]))
lazy_filegroups = {}
diff --git a/toolchain/private/BUILD.sdk.bazel b/toolchain/private/BUILD.sdk.bazel
index 39a6a93..3e7c23e 100644
--- a/toolchain/private/BUILD.sdk.bazel
+++ b/toolchain/private/BUILD.sdk.bazel
@@ -1,6 +1,7 @@
load("@bazel-zig-cc//toolchain/private:cc_toolchains.bzl", "declare_cc_toolchains")
declare_cc_toolchains(
+ os = {os},
absolute_path = {absolute_path},
zig_include_root = {zig_include_root},
)
diff --git a/toolchain/private/cc_toolchains.bzl b/toolchain/private/cc_toolchains.bzl
index 64e99f1..e6594db 100644
--- a/toolchain/private/cc_toolchains.bzl
+++ b/toolchain/private/cc_toolchains.bzl
@@ -1,4 +1,4 @@
-load(":defs.bzl", "DEFAULT_INCLUDE_DIRECTORIES", "ZIG_TOOL_PATH", "target_structs")
+load(":defs.bzl", "DEFAULT_INCLUDE_DIRECTORIES", "target_structs", "zig_tool_path")
load("@bazel-zig-cc//toolchain:zig_toolchain.bzl", "zig_cc_toolchain_config")
DEFAULT_TOOL_PATHS = {
@@ -11,7 +11,7 @@ DEFAULT_TOOL_PATHS = {
"strip": "/usr/bin/false",
}.items()
-def declare_cc_toolchains(absolute_path, zig_include_root):
+def declare_cc_toolchains(os, absolute_path, zig_include_root):
for target_config in target_structs():
gotarget = target_config.gotarget
zigtarget = target_config.zigtarget
@@ -28,7 +28,7 @@ def declare_cc_toolchains(absolute_path, zig_include_root):
if path[0] == "/":
absolute_tool_paths[name] = path
continue
- tool_path = ZIG_TOOL_PATH.format(zig_tool = path)
+ tool_path = zig_tool_path(os).format(zig_tool = path)
absolute_tool_paths[name] = "%s/%s" % (absolute_path, tool_path)
linkopts = target_config.linkopts
diff --git a/toolchain/private/defs.bzl b/toolchain/private/defs.bzl
index 6059065..6804104 100644
--- a/toolchain/private/defs.bzl
+++ b/toolchain/private/defs.bzl
@@ -4,7 +4,7 @@ DEFAULT_INCLUDE_DIRECTORIES = [
"libcxxabi/include",
]
-ZIG_TOOL_PATH = "tools/{zig_tool}"
+_ZIG_TOOL_PATH = "tools/{zig_tool}"
# Zig supports even older glibcs than defined below, but we have tested only
# down to 2.17.
@@ -30,6 +30,12 @@ _GLIBCS = [
LIBCS = ["musl"] + ["gnu.{}".format(glibc) for glibc in _GLIBCS]
+def zig_tool_path(os):
+ if os == "windows":
+ return _ZIG_TOOL_PATH + ".bat"
+ else:
+ return _ZIG_TOOL_PATH
+
def target_structs():
ret = []
for zigcpu, gocpu in (("x86_64", "amd64"), ("aarch64", "arm64")):
--
2.25.1
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for <~motiejus/bazel-zig-cc@lists.sr.ht>; Sun, 29 May 2022 16:35:48 +0000 (UTC)
From: Fabian Hahn <fabian@hahn.graphics>
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To: ~motiejus/bazel-zig-cc@lists.sr.ht
Cc: Fabian Hahn <fabian@hahn.graphics>
Subject: [PATCH bazel-zig-cc v2 2/3] added support for Windows targets
Date: Sun, 29 May 2022 17:35:17 +0100
Message-Id: <20220529163518.182119-3-fabian@hahn.graphics>
In-Reply-To: <20220529163518.182119-1-fabian@hahn.graphics>
References: <20220529163518.182119-1-fabian@hahn.graphics>
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Lines: 100
---
README.md | 14 ++++++++++++++
toolchain/platform/defs.bzl | 7 ++++++-
toolchain/private/defs.bzl | 19 +++++++++++++++++++
3 files changed, 39 insertions(+), 1 deletion(-)
diff --git a/README.md b/README.md
index b092ae0..e6fd5e2 100644
--- a/README.md
+++ b/README.md
@@ -152,6 +152,8 @@ register_toolchains(
"@zig_sdk//toolchain:linux_arm64_gnu.2.28",
"@zig_sdk//toolchain:darwin_amd64",
"@zig_sdk//toolchain:darwin_arm64",
+ "@zig_sdk//toolchain:windows_amd64",
+ "@zig_sdk//toolchain:windows_arm64",
)
```
@@ -318,6 +320,18 @@ is currently not implemented.
target macos.10 (Catalina), macos.11 (Big Sur) or macos.12 (Monterey). It
currently targets the lowest version, without ability to change it.
+## Windows: output file extensions
+
+Bazel won't use common Windows file extensions for built output binaries.
+Instead, it will generate binaries with common Unix extensions that you might
+have to manually rename before deploying them to an actual Windows system:
+
+| Binary type | Bazel extension | Windows extension |
+|----------------|-----------------|-------------------|
+| Static library | .a | .lib |
+| Shared library | .so | .dll |
+| Executable | (no extension) | .exe |
+
# Known Issues In Upstream
This section lists issues that I've stumbled into when using `zig cc`, and is
diff --git a/toolchain/platform/defs.bzl b/toolchain/platform/defs.bzl
index cf42191..07e69a6 100644
--- a/toolchain/platform/defs.bzl
+++ b/toolchain/platform/defs.bzl
@@ -1,11 +1,16 @@
load("@bazel-zig-cc//toolchain/private:defs.bzl", "LIBCS")
_CPUS = (("x86_64", "amd64"), ("aarch64", "arm64"))
+_OS = {
+ "linux": ["linux"],
+ "macos": ["macos", "darwin"],
+ "windows": ["windows"],
+}
def declare_platforms():
# create @zig_sdk//{os}_{arch}_platform entries with zig and go conventions
for zigcpu, gocpu in _CPUS:
- for bzlos, oss in {"linux": ["linux"], "macos": ["macos", "darwin"]}.items():
+ for bzlos, oss in _OS.items():
for os in oss:
declare_platform(gocpu, zigcpu, bzlos, os)
diff --git a/toolchain/private/defs.bzl b/toolchain/private/defs.bzl
index 6804104..2ba61f7 100644
--- a/toolchain/private/defs.bzl
+++ b/toolchain/private/defs.bzl
@@ -40,6 +40,7 @@ def target_structs():
ret = []
for zigcpu, gocpu in (("x86_64", "amd64"), ("aarch64", "arm64")):
ret.append(_target_darwin(gocpu, zigcpu))
+ ret.append(_target_windows(gocpu, zigcpu))
ret.append(_target_linux_musl(gocpu, zigcpu))
for glibc in _GLIBCS:
ret.append(_target_linux_gnu(gocpu, zigcpu, glibc))
@@ -69,6 +70,24 @@ def _target_darwin(gocpu, zigcpu):
tool_paths = {"ld": "ld64.lld"},
)
+def _target_windows(gocpu, zigcpu):
+ return struct(
+ gotarget = "windows_{}".format(gocpu),
+ zigtarget = "{}-windows-gnu".format(zigcpu),
+ includes = [
+ "libunwind/include",
+ "libc/include/any-windows-any",
+ ],
+ linkopts = [],
+ copts = [],
+ bazel_target_cpu = "x64_windows",
+ constraint_values = [
+ "@platforms//os:windows",
+ "@platforms//cpu:{}".format(zigcpu),
+ ],
+ tool_paths = {"ld": "ld64.lld"},
+ )
+
def _target_linux_gnu(gocpu, zigcpu, glibc_version):
glibc_suffix = "gnu.{}".format(glibc_version)
--
2.25.1
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Date: Sun, 29 May 2022 17:05:29 +0000
Subject: [bazel-zig-cc/patches/.build.yml] build failed
To: "Fabian Hahn" <fabian@hahn.graphics>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht
From: "builds.sr.ht" <builds@sr.ht>
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bazel-zig-cc/patches/.build.yml: FAILED in 29m34s
[Windows support][0] v2 from [Fabian Hahn][1]
[0]: https://lists.sr.ht/~motiejus/bazel-zig-cc/patches/32601
[1]: mailto:fabian@hahn.graphics
=E2=9C=97 #769696 FAILED bazel-zig-cc/patches/.build.yml https://builds.sr.=
ht/~motiejus/job/769696
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From: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Date: Mon, 30 May 2022 15:37:47 +0300
Message-ID: <CAFVMu-ps+Pt5DqSnUZ323sDcQB-MmjBg01nMfHK+kxtgr0Ew_g@mail.gmail.com>
Subject: Re: [PATCH bazel-zig-cc v2 0/3] Windows support
To: Fabian Hahn <fabian@hahn.graphics>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht
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On Sun, May 29, 2022 at 7:35 PM Fabian Hahn <fabian@hahn.graphics> wrote:
>
> Hello,
>
> Second version of my patchset adding Windows support to bazel-zig-cc.
>
> Changelog compared to v1:
> - fixed lint failures
> - dropped patch to add extra platform constraint settings
> - added patch to add testing for Windows target using wine-binfmt
> - added README.md entries explaining Windows support
>
> I hope it passes CI, but I do not know how to trigger it other than
> sending you a second patch version. In case of further failures, I
> will of course look into fixing them. Please let me know if anything
> looks like it is missing :)
Hi, Fabian,
As you may have noticed, the past patchset doesn't pass CI. If you
have a Linux machine, the tests are quite easy to execute manually[1].
Otherwise don't worry about sending multiple patch versions; I am
happy to ignore the patchsets (and the emails from the CI) until the
tests pass. That's what they are there for!
You can also use a transient docker environment[2] to isolate yourself
from the host OS. Let me know if that works for you.
Motiejus
[1]: https://git.sr.ht/~motiejus/bazel-zig-cc/tree/main/item/.build.yml
[2]: https://git.sr.ht/~motiejus/bazel-zig-cc#transient-docker-environment
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From: ~jvolkman <jvolkman@git.sr.ht>
Date: Wed, 01 Jun 2022 01:58:18 +0000
Subject: [PATCH bazel-zig-cc 0/2] Ignore undefined symbols when building
dynamic libraries on darwin
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Hi,
Here's an updated version of this patchset that fixes an operator
precedence issue in zig_toolchain.bzl when building flag_sets.
//test/gorace:gorace_test was failing before, but now passes.
I haven't been able to get the arm64 tests to pass locally. Here's
hoping they work too!
Jeremy Volkman (2):
Adds dynamic_library_linkopts to zig_cc_toolchain_config
Pass "-Wl,-undefined=dynamic_lookup" for dynamic libraries on darwin.
toolchain/private/cc_toolchains.bzl | 2 ++
toolchain/private/defs.bzl | 3 +++
toolchain/zig_toolchain.bzl | 22 +++++++++++++++++++---
3 files changed, 24 insertions(+), 3 deletions(-)
--
2.34.2
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From: ~jvolkman <jvolkman@git.sr.ht>
Date: Tue, 24 May 2022 17:14:35 -0700
Subject: [PATCH bazel-zig-cc 1/2] Adds dynamic_library_linkopts to
zig_cc_toolchain_config
Message-ID: <165404869855.21942.14779642481390967131-1@git.sr.ht>
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From: Jeremy Volkman <jeremy@jvolkman.com>
If specified, the flags in dynamic_library_linkopts are included in
cpp_link_dynamic_library and cpp_link_nodeps_dynamic_library actions.
---
toolchain/private/cc_toolchains.bzl | 2 ++
toolchain/private/defs.bzl | 3 +++
toolchain/zig_toolchain.bzl | 22 +++++++++++++++++++---
3 files changed, 24 insertions(+), 3 deletions(-)
diff --git a/toolchain/private/cc_toolchains.bzl b/toolchain/private/cc_toolc=
hains.bzl
index 64e99f1..3a1e1cb 100644
--- a/toolchain/private/cc_toolchains.bzl
+++ b/toolchain/private/cc_toolchains.bzl
@@ -32,6 +32,7 @@ def declare_cc_toolchains(absolute_path, zig_include_root):
absolute_tool_paths[name] =3D "%s/%s" % (absolute_path, tool_pat=
h)
=20
linkopts =3D target_config.linkopts
+ dynamic_library_linkopts =3D target_config.dynamic_library_linkopts
copts =3D target_config.copts
for s in getattr(target_config, "linker_version_scripts", []):
linkopts =3D linkopts + ["-Wl,--version-script,%s/%s" % (absolut=
e_path, s)]
@@ -45,6 +46,7 @@ def declare_cc_toolchains(absolute_path, zig_include_root):
cxx_builtin_include_directories =3D cxx_builtin_include_director=
ies,
copts =3D copts,
linkopts =3D linkopts,
+ dynamic_library_linkopts =3D dynamic_library_linkopts,
target_cpu =3D target_config.bazel_target_cpu,
target_system_name =3D "unknown",
target_libc =3D "unknown",
diff --git a/toolchain/private/defs.bzl b/toolchain/private/defs.bzl
index 6059065..053641c 100644
--- a/toolchain/private/defs.bzl
+++ b/toolchain/private/defs.bzl
@@ -54,6 +54,7 @@ def _target_darwin(gocpu, zigcpu):
"libc/include/any-macos-any",
],
linkopts =3D [],
+ dynamic_library_linkopts =3D [],
copts =3D [],
bazel_target_cpu =3D "darwin",
constraint_values =3D [
@@ -84,6 +85,7 @@ def _target_linux_gnu(gocpu, zigcpu, glibc_version):
compiler_extra_includes =3D ["glibc-hacks/glibchack-fcntl.h"] if fcn=
tl_hack else [],
linker_version_scripts =3D ["glibc-hacks/fcntl.map"] if fcntl_hack e=
lse [],
linkopts =3D ["-lc++", "-lc++abi"],
+ dynamic_library_linkopts =3D [],
copts =3D [],
bazel_target_cpu =3D "k8",
constraint_values =3D [
@@ -105,6 +107,7 @@ def _target_linux_musl(gocpu, zigcpu):
"libc/include/{}-linux-any".format(zigcpu),
] + (["libc/include/x86-linux-any"] if zigcpu =3D=3D "x86_64" else [=
]),
linkopts =3D ["-s", "-w"],
+ dynamic_library_linkopts =3D [],
copts =3D ["-D_LIBCPP_HAS_MUSL_LIBC", "-D_LIBCPP_HAS_THREAD_API_PTHR=
EAD"],
bazel_target_cpu =3D "k8",
constraint_values =3D [
diff --git a/toolchain/zig_toolchain.bzl b/toolchain/zig_toolchain.bzl
index aa14ec1..f22bc4c 100644
--- a/toolchain/zig_toolchain.bzl
+++ b/toolchain/zig_toolchain.bzl
@@ -14,6 +14,11 @@ all_link_actions =3D [
ACTION_NAMES.cpp_link_nodeps_dynamic_library,
]
=20
+dynamic_library_link_actions =3D [
+ ACTION_NAMES.cpp_link_dynamic_library,
+ ACTION_NAMES.cpp_link_nodeps_dynamic_library,
+]
+
compile_and_link_actions =3D [
ACTION_NAMES.c_compile,
ACTION_NAMES.cpp_compile,
@@ -73,21 +78,31 @@ def _zig_cc_toolchain_config_impl(ctx):
],
)
=20
+ if ctx.attr.dynamic_library_linkopts:
+ dynamic_library_flag_sets =3D [
+ flag_set(
+ actions =3D dynamic_library_link_actions,
+ flag_groups =3D [flag_group(flags =3D ctx.attr.dynamic_libra=
ry_linkopts)],
+ ),
+ ]
+ else:
+ dynamic_library_flag_sets =3D []
+
default_linker_flags =3D feature(
name =3D "default_linker_flags",
enabled =3D True,
flag_sets =3D [
flag_set(
actions =3D all_link_actions,
- flag_groups =3D ([
+ flag_groups =3D [
flag_group(
flags =3D ["-target", ctx.attr.target] +
no_gc_sections +
ctx.attr.linkopts,
),
- ]),
+ ],
),
- ],
+ ] + dynamic_library_flag_sets,
)
=20
features =3D [
@@ -119,6 +134,7 @@ zig_cc_toolchain_config =3D rule(
attrs =3D {
"cxx_builtin_include_directories": attr.string_list(),
"linkopts": attr.string_list(),
+ "dynamic_library_linkopts": attr.string_list(),
"copts": attr.string_list(),
"tool_paths": attr.string_dict(),
"target": attr.string(),
--=20
2.34.2
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From: ~jvolkman <jvolkman@git.sr.ht>
Date: Tue, 24 May 2022 17:17:33 -0700
Subject: [PATCH bazel-zig-cc 2/2] Pass "-Wl,-undefined=dynamic_lookup" for
dynamic libraries on darwin.
Message-ID: <165404869855.21942.14779642481390967131-2@git.sr.ht>
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From: Jeremy Volkman <jeremy@jvolkman.com>
This linker flag causes undefined symbols to be ignored, which is the
default behavior on linux but not macos. This is required when building
shared libraries to use as e.g. Python modules. This also matches what
Bazel's built-in macos cc toolchain does.
---
toolchain/private/defs.bzl | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/toolchain/private/defs.bzl b/toolchain/private/defs.bzl
index 053641c..42aaaeb 100644
--- a/toolchain/private/defs.bzl
+++ b/toolchain/private/defs.bzl
@@ -54,7 +54,7 @@ def _target_darwin(gocpu, zigcpu):
"libc/include/any-macos-any",
],
linkopts = [],
- dynamic_library_linkopts = [],
+ dynamic_library_linkopts = ["-Wl,-undefined=dynamic_lookup"],
copts = [],
bazel_target_cpu = "darwin",
constraint_values = [
--
2.34.2
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Subject: [bazel-zig-cc/patches/.build.yml] build success
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bazel-zig-cc/patches/.build.yml: SUCCESS in 13m55s
[Ignore undefined symbols when building dynamic libraries on darwin][0] fro=
m [~jvolkman][1]
[0]: https://lists.sr.ht/~motiejus/bazel-zig-cc/patches/32674
[1]: mailto:jeremy@jvolkman.com
=E2=9C=93 #771513 SUCCESS bazel-zig-cc/patches/.build.yml https://builds.sr=
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Date: Wed, 1 Jun 2022 12:02:06 +0300
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Subject: Re: [PATCH bazel-zig-cc 0/2] Ignore undefined symbols when building
dynamic libraries on darwin
To: "~jvolkman" <jeremy@jvolkman.com>
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On Wed, Jun 1, 2022 at 4:58 AM ~jvolkman <jvolkman@git.sr.ht> wrote:
>
> Hi,
>
> Here's an updated version of this patchset that fixes an operator
> precedence issue in zig_toolchain.bzl when building flag_sets.
> //test/gorace:gorace_test was failing before, but now passes.
As I have no idea how this works on Darwin, and we don't use Darwin
targets internally yet, my acceptance criteria for Darwin is:
- CI passes.
- after reading the commit messages it seems like you know what you
are doing. Though for next time please add more links where those are
discussed.
- I trust people on internet by default (in other words, I don't have
a reason to not trust you).
Applied.
> I haven't been able to get the arm64 tests to pass locally. Here's
> hoping they work too!
I assume you mean linux_arm64. That fails for me too, because it is
relying on system's arm64 libc. The real resolution would be to use a
hermetic libc, which I haven't gotten around doing yet. But as long as
CI passes, we're good.
Motiejus
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Date: Wed, 1 Jun 2022 12:10:27 +0300
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Subject: bazel-zig-cc v0.7.3 and published Zig Milan talk
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Hi folks,
If you haven't seen, my Zig Milan talk about Zig and Uber was
published[1], together with an accompanying blog post[2].
Now to our bazel-zig-cc changelog from v0.7.2 to v0.7.3:
# zig sdk: download from zig upstream as well as jakstys.lt
This will prefer Zig upstream mirror over my server. This should
increase reliability. I hope Bazel will try the secondary mirror when
it gets a 404 from Zig's. Time will tell.
# Darwin changes by Jeremy Volkman
See the thread discussing the patch[3] for more info.
Motiejus
[1]: https://www.youtube.com/watch?v=SCj2J3HcEfc
[2]: https://jakstys.lt/2022/how-uber-uses-zig/
[3]: https://lists.sr.ht/~motiejus/bazel-zig-cc/%3C165404869855.21942.14779642481390967131-0%40git.sr.ht%3E#%3CCAFVMu-qEJGEUdQSpzYegi+3Z8c1iEDagdd8a1Jv2JP-6+pBy8Q@mail.gmail.com%3E
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From: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Date: Wed, 1 Jun 2022 12:36:30 +0300
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Subject: Re: [PATCH bazel-zig-cc 0/2] Ignore undefined symbols when building
dynamic libraries on darwin
To: Jeremy Volkman <jeremy@jvolkman.com>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht
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On Wed, Jun 1, 2022 at 12:30 PM Jeremy Volkman <jeremy@jvolkman.com> wrote:
>
> Hi Motiejus,
>
> Thanks for accepting. I'm not sure if you saw, but I had submitted this patch a week ago (broken) with more discussion and links in the overview. I forgot to increment the version number, so it wasn't obvious.
I had a vague memory of looking into this, but wasn't sure where.
Turns out that wasn't that long ago. :)
Anyhow, reason I am asking this: I try to apply patches as-is, so all
re-posts should be self-contained, as if earlier of them didn't
happen, because they are not going to the git history. Let's err on
the side of more verbosity than less, always.
Thanks,
Motiejus
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From: Jeremy Volkman <jeremy@jvolkman.com>
Date: Wed, 1 Jun 2022 02:42:53 -0700
Message-ID: <CAFuCWxtUpyZ2CETxdYct7J8sNOz2zknE2Ox4Z60qtQap8RrvQA@mail.gmail.com>
Subject: Re: [PATCH bazel-zig-cc 0/2] Ignore undefined symbols when building
dynamic libraries on darwin
To: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
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Sounds good. Thanks!
-Jeremy
On Wed, Jun 1, 2022 at 2:36 AM Motiejus Jak=C5=A1tys <motiejus@jakstys.lt> =
wrote:
>
> On Wed, Jun 1, 2022 at 12:30 PM Jeremy Volkman <jeremy@jvolkman.com> wrot=
e:
> >
> > Hi Motiejus,
> >
> > Thanks for accepting. I'm not sure if you saw, but I had submitted this=
patch a week ago (broken) with more discussion and links in the overview. =
I forgot to increment the version number, so it wasn't obvious.
>
> I had a vague memory of looking into this, but wasn't sure where.
> Turns out that wasn't that long ago. :)
>
> Anyhow, reason I am asking this: I try to apply patches as-is, so all
> re-posts should be self-contained, as if earlier of them didn't
> happen, because they are not going to the git history. Let's err on
> the side of more verbosity than less, always.
>
> Thanks,
> Motiejus
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Date: Wed, 01 Jun 2022 18:05:37 +0100
From: fabian@hahn.graphics
To: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht
Subject: Re: [PATCH bazel-zig-cc v2 0/3] Windows support
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Hey Motiejus,
On 2022-05-30 13:37, Motiejus Jakštys wrote:
> As you may have noticed, the past patchset doesn't pass CI. If you
> have a Linux machine, the tests are quite easy to execute manually[1].
> Otherwise don't worry about sending multiple patch versions; I am
> happy to ignore the patchsets (and the emails from the CI) until the
> tests pass. That's what they are there for!
I've actually been running the tests successfully on my Ubuntu box. I a
bit confused at first looking at the failed build logs [1] until I
I realized what the problem was: Even though I updated .build.yml in my
patch, it actually uses the original baseline file in the repo to run
the CI steps. This means that my addition of the wine-binfmt Debian
package doesn't get picked up, which then causes the bazel test to fail
that tries to run the actual Windows binary as it doesn't know how to
interpret it. I now realized that there's further setup commands in the
"setup" task. I will try to add the package there instead.
> You can also use a transient docker environment[2] to isolate yourself
> from the host OS. Let me know if that works for you.
I just tried this and my tests passed, but only after I manually ran
`update-binfmts --enable wine` inside the container. I'm a bit confused
because this wasn't needed for qemu arm64 emulation, but maybe that's a
wine-binfmt specific thing? Anyway, I will try to go with the setup
step approach and add that extra command there too if needed.
Best,
Fabian
[1] https://builds.sr.ht/~motiejus/job/769696
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From: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Date: Thu, 2 Jun 2022 06:06:46 +0300
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Subject: Re: [PATCH bazel-zig-cc v2 0/3] Windows support
To: Fabian Hahn <fabian@hahn.graphics>
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On Wed, Jun 01, 2022 at 06:05:37PM +0100, fabian@hahn.graphics wrote:
> Hey Motiejus,
>
> On 2022-05-30 13:37, Motiejus Jak=C5=A1tys wrote:
> > As you may have noticed, the past patchset doesn't pass CI. If you
> > have a Linux machine, the tests are quite easy to execute manually[1].
> > Otherwise don't worry about sending multiple patch versions; I am
> > happy to ignore the patchsets (and the emails from the CI) until the
> > tests pass. That's what they are there for!
>
> I've actually been running the tests successfully on my Ubuntu box. I a
> bit confused at first looking at the failed build logs [1] until I
> I realized what the problem was: Even though I updated .build.yml in my
> patch, it actually uses the original baseline file in the repo to run
> the CI steps. This means that my addition of the wine-binfmt Debian
> package doesn't get picked up, which then causes the bazel test to fail
> that tries to run the actual Windows binary as it doesn't know how to
> interpret it. I now realized that there's further setup commands in the
> "setup" task. I will try to add the package there instead.
>
> > You can also use a transient docker environment[2] to isolate yourself
> > from the host OS. Let me know if that works for you.
>
> I just tried this and my tests passed, but only after I manually ran
> `update-binfmts --enable wine` inside the container. I'm a bit confused
> because this wasn't needed for qemu arm64 emulation, but maybe that's a
> wine-binfmt specific thing? Anyway, I will try to go with the setup
> step approach and add that extra command there too if needed.
That's fine. I pushed it to a branch, which kicked off CI[1]. That
passed.
I will review your patch in a short order. Sorry for the confusion and
thank you for clarifying.
Motiejus
[1]: https://builds.sr.ht/~motiejus/job/772421
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From: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Date: Mon, 6 Jun 2022 10:37:37 +0300
Message-ID: <CAFVMu-o4DSj9H1qfJ8oBHGu6CXGszY79eERJRx6EXWeXPgtjKA@mail.gmail.com>
Subject: Re: [PATCH bazel-zig-cc v2 0/3] Windows support
To: Fabian Hahn <fabian@hahn.graphics>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht
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On Thu, Jun 2, 2022 at 6:06 AM Motiejus Jak=C5=A1tys <motiejus@jakstys.lt> =
wrote:
> I will review your patch in a short order. Sorry for the confusion and
> thank you for clarifying.
>
Hi Fabian,
I spent a couple of hours on this and published it to
motiejus_windows[1] branch. Notable changes:
- added test wrappers, so we no longer depend on wine-binfmt. Bazel
does something unusual with sandboxing, so we still need this for
linux-arm64.
- side effect: `bazel test ...` remains the only command to run all
tests by a mixture of "manual" and "no-sandbox" tags on some targets.
- fixed linux-arm64.gnu tests. Until the changes those failed on all
computers I've tried except CI. Now they work everywhere I've tried,
assuming dependencies are installed.
- trivial: renamed ext to _ext to convey "it's private", also updated
release scripts.
Please review my changes on top of yours in the branch[1] and let me
know if I didn't mess up anything. Then I can release v0.8.0.
As usual, thanks to Laurynas for tips.
Motiejus
[1]: https://git.sr.ht/~motiejus/bazel-zig-cc/tree/motiejus_windows
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To: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht
Subject: Re: [PATCH bazel-zig-cc v2 0/3] Windows support
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Hey Motiejus,
Thanks a lot for looking at my patches and adjusting them further.
On 2022-06-06 08:37, Motiejus Jakštys wrote:
> - added test wrappers, so we no longer depend on wine-binfmt. Bazel
> does something unusual with sandboxing, so we still need this for
> linux-arm64.
I don't particularly mind, the run_under approach also looks fine to
me.
> - side effect: `bazel test ...` remains the only command to run all
> tests by a mixture of "manual" and "no-sandbox" tags on some targets.
I didn't know about the no-sandbox tag in bazel, so that's a great
solution to make it work under `bazel test ...`!
> - fixed linux-arm64.gnu tests. Until the changes those failed on all
> computers I've tried except CI. Now they work everywhere I've tried,
> assuming dependencies are installed.
Right, I actually ended up passing QEMU_LD_PREFIX in --action_env and
thought I had somehow messed up my qemu setup. Good to see this fixed!
> Please review my changes on top of yours in the branch[1] and let me
> know if I didn't mess up anything. Then I can release v0.8.0.
The only thing I noticed is that since we no longer explicitly run
bazel build in ci/test, we won't build the windows_arm64 test binary
anymore. As far as I know bazel test ... won't build targets that are
not required for running any tests, so unless we also put a command
for bael build ... somewhere it won't be covered. This is a very
minor point though, so feel free to ignore.
I did run your branch against my project both on Linux and Windows
machines and everything worked flawlessly. So from my point of view
this is good to go.
Best,
Fabian
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From: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Date: Wed, 8 Jun 2022 22:51:08 +0300
Message-ID: <CAFVMu-p=dPLrsCbMnR26MHj22rTk3LhE09_Ps2=cB_0sOZjPCA@mail.gmail.com>
Subject: Re: [PATCH bazel-zig-cc v2 0/3] Windows support
To: Fabian Hahn <fabian@hahn.graphics>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht
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On Wed, Jun 8, 2022 at 8:03 PM <fabian@hahn.graphics> wrote:
>
> On 2022-06-06 08:37, Motiejus Jak=C5=A1tys wrote:
>
> The only thing I noticed is that since we no longer explicitly run
> bazel build in ci/test, we won't build the windows_arm64 test binary
> anymore. As far as I know bazel test ... won't build targets that are
> not required for running any tests, so unless we also put a command
> for bael build ... somewhere it won't be covered. This is a very
> minor point though, so feel free to ignore.
Not in my experience: if an executable label doesn't have a "manual"
tag, it will be built.
Let's run a na=C3=AEve test. Apply this patch to the branch:
diff --git a/test/windows/main.c b/test/windows/main.c
index b5302af..5f94789 100644
--- a/test/windows/main.c
+++ b/test/windows/main.c
@@ -1,6 +1,10 @@
#include <stdio.h>
#include <windows.h>
+#ifdef _M_ARM64
+error
+#endif
+
int main() {
DWORD version =3D GetVersion();
DWORD majorVersion =3D (DWORD)(LOBYTE(LOWORD(version)));
And then run the following:
1) bazel test //test/windows:winver_windows_amd64 # OK
2) bazel build //test/windows:winver_windows_arm64 # FAIL
3) bazel test ... # FAIL, the same way as above
According to your earlier description, only (2) should fail. But 3
fails too. I will not paste the full error message here, but suffice
to say, it is what I expect it to be.
> I did run your branch against my project both on Linux and Windows
> machines and everything worked flawlessly. So from my point of view
> this is good to go.
Will merge. Thank you for your contribution!
Motiejus
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Subject: bazel-zig-cc v0.8.0
To: ~motiejus/bazel-zig-cc@lists.sr.ht, Fabian Hahn <fabian@hahn.graphics>,
"~laurynasl" <laurynasl@uber.com>
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Hi all,
bazel-zig-cc v0.8.0 is released. It adds windows (host and target)
support and cleans up multiarch tests. All tests work on all machines
I've tried, when previously it was CI-only.
# Incompatible changes
With `zig_toolchains` you add to your workspace: the "urls" parameter
now needs "{_ext}" instead of "tar.xz". As usual, see USAGE[1] for an
example.
# Thanks
Kudos to Fabian Hahn for contributing Windows support!
The test organization was mostly guided by Laurynas. He mostly talked,
I mostly wrote the code. As usual with every recent release, thank
you, Laurynai!
Motiejus
[1]: https://git.sr.ht/~motiejus/bazel-zig-cc#usage
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Date: Thu, 09 Jun 2022 11:28:57 +0100
From: fabian@hahn.graphics
To: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht
Subject: Re: [PATCH bazel-zig-cc v2 0/3] Windows support
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Hi Motiejus,
On 2022-06-08 20:51, Motiejus Jakštys wrote:
> According to your earlier description, only (2) should fail. But 3
> fails too. I will not paste the full error message here, but suffice
> to say, it is what I expect it to be.
Wow, you're right. I've been using bazel for over 5 years now and
never realized this. Thanks for the clarification, and thank you for
merging my patches and the release!
Best,
Fabian
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From: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Date: Thu, 9 Jun 2022 14:48:53 +0300
Message-ID: <CAFVMu-q9B2OD0+zery+8kytJpo6YTB0t7tOJivATLW4vF2x8JQ@mail.gmail.com>
Subject: Re: [PATCH bazel-zig-cc v2 0/3] Windows support
To: Fabian Hahn <fabian@hahn.graphics>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht
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On Thu, Jun 9, 2022 at 1:29 PM <fabian@hahn.graphics> wrote:
> <...> and thank you for merging my patches and the release!
Hi Fabian,
No problem! Note that your name is featured in the README[1] now.
Please read it and make sure you understand what you have signed up
for. :)
Motiejus
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Subject: bazel-zig-cc v0.8.2
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Hi all,
I released v0.8.3, which adds fastbuild, dbg and opt settings with
defaults suitable for zig-cc:
- zig by default adds `-flto`; fastbuild negates it.
- add -O0, which now zig cc[1] interprets correctly.
- also use today's zig sdk for tests.
This v0.8.3 should have been v0.8.1; please ignore v0.8.1 and v0.8.2,
these are caused by me trying to overly rush things today.
[1]: https://github.com/ziglang/zig/issues/11921
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Subject: development tracks of bazel-zig-cc v0.9
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Hi all,
I will occasionally share some longer-term development updates. This is
one of those. Now we have a couple of ongoing threads:
- linker robustness
- performance issues when using zig-cc.
Linker robustness
-----------------
One of the biggest source of work when adopting zig-cc for our compiler
needs was it's lack of support for various linker arguments. When
compiling a program, you would often see something like this:
warning: unsupported linker arg: --sort-section
warning: unsupported linker arg: alignment
warning: unsupported linker arg: --exclude-libs
warning: unsupported linker arg: ALL
Zig ignoring the flags was the right thing to do at the beginning, but
this tends to break software in subtle ways during runtime. So I
proposed failing hard on unsupported flags[1] and implemented (some
still under review) the ones that I found in the wild[2]. Please +1.
Performance issues
------------------
We have found non-deterministic performance degradations when building
lots of code using bazel-zig-cc on a 96-core server. Usually our test
shard takes 5-10 minutes to build, but with bazel-zig-cc some time out
after 30 minutes. More about the CI infra here[4].
So far we found:
- zig was translating -Og to -O1, now fixed[5].
- -fno-sanitize=undefined can decrease the build time by 30-50% for
non-optimized binaries.
- -g0 (remove debug symbols) can reduce the build time by 30-50%.
With these changes the baseline "zig cc" performance is similar to
clang/gcc, but some shards still time out. We currently suspect there is
some contention in zig's caching layer; the track is active, stay tuned.
To be clear, we are not planning to remove the safety/debug features in
bazel-zig-cc for the sake of speed; this is just data we've gathered so
far.
Regards,
Motiejus
[1]: https://github.com/ziglang/zig/pull/11906
[2]: https://github.com/ziglang/zig/pulls?q=is%3Apr+author%3Amotiejus+
[3]: https://github.com/ziglang/zig/pull/11863
[4]: https://eng.uber.com/how-we-halved-go-monorepo-ci-build-time/
[5]: https://github.com/ziglang/zig/pull/11949
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Wed, 27 Jul 2022 12:15:15 -0700 (PDT)
From: Luis Holanda <luiscmholanda@gmail.com>
To: ~motiejus/bazel-zig-cc@lists.sr.ht
Cc: Luis Holanda <luiscmholanda@gmail.com>
Subject: [PATCH] Add missing include path for MacOS platforms
Date: Wed, 27 Jul 2022 16:13:06 -0300
Message-Id: <20220727191305.1656332-1-luiscmholanda@gmail.com>
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While integrating the project into our Bazel workspace, we had some
problems while building protoc in an Intel MacBook.
>From my testing, the issue seems to be caused by missing include path
in the toolchain configuration to the `-none` variant of the headers.
More details below.
The issue can be reproduced directly inside `bazel-zig-cc` by including
the protobuf workspace as a dependency:
+http_archive(
+ name = "com_google_protobuf",
+ sha256 = "2d9084d3dd13b86ca2e811d2331f780eb86f6d7cb02b405426e3c80dcbfabf25",
+ strip_prefix = "protobuf-3.21.1",
+ url = "https://github.com/protocolbuffers/protobuf/archive/v3.21.1.zip",
+)
+
+load("@com_google_protobuf//:protobuf_deps.bzl", "protobuf_deps")
+
+protobuf_deps()
And then executing:
bazel build --platforms @zig_sdk//platform:darwin_amd64 @com_google_protobuf//:protoc
The command fails with the same error both in native compilation and
cross-compiling from Linux. The error:
ERROR: <output_base>/external/zlib/BUILD.bazel:37:11: Compiling compress.c failed: undeclared inclusion(s) in rule '@zlib//:zlib':
this rule is missing dependency declarations for the following files included by 'compress.c':
'<output_base>/external/zig_sdk/lib/libc/include/x86_64-macos.10-none/sys/cdefs.h'
'<output_base>/external/zig_sdk/lib/libc/include/x86_64-macos.10-none/sys/_symbol_aliasing.h'
'<output_base>/external/zig_sdk/lib/libc/include/x86_64-macos.10-none/machine/limits.h'
'<output_base>/external/zig_sdk/lib/libc/include/x86_64-macos.10-none/i386/limits.h'
'<output_base>/external/zig_sdk/lib/libc/include/x86_64-macos.10-none/i386/_limits.h'
'<output_base>/external/zig_sdk/lib/libc/include/x86_64-macos.10-none/sys/syslimits.h'
'<output_base>/external/zig_sdk/lib/libc/include/x86_64-macos.10-none/machine/types.h'
'<output_base>/external/zig_sdk/lib/libc/include/x86_64-macos.10-none/i386/types.h'
'<output_base>/external/zig_sdk/lib/libc/include/x86_64-macos.10-none/i386/_types.h'
'<output_base>/external/zig_sdk/lib/libc/include/x86_64-macos.10-none/sys/_types/_int8_t.h'
'<output_base>/external/zig_sdk/lib/libc/include/x86_64-macos.10-none/sys/_types/_uintptr_t.h'
'<output_base>/external/zig_sdk/lib/libc/include/x86_64-macos.10-none/machine/_types.h'
'<output_base>/external/zig_sdk/lib/libc/include/x86_64-macos.10-none/sys/_pthread/_pthread_types.h'
'<output_base>/external/zig_sdk/lib/libc/include/x86_64-macos.10-none/machine/endian.h'
'<output_base>/external/zig_sdk/lib/libc/include/x86_64-macos.10-none/i386/endian.h'
'<output_base>/external/zig_sdk/lib/libc/include/x86_64-macos.10-none/libkern/_OSByteOrder.h'
'<output_base>/external/zig_sdk/lib/libc/include/x86_64-macos.10-none/libkern/i386/_OSByteOrder.h'
'<output_base>/external/zig_sdk/lib/libc/include/x86_64-macos.10-none/sys/_types/_fd_def.h'
'<output_base>/external/zig_sdk/lib/libc/include/x86_64-macos.10-none/Availability.h'
'<output_base>/external/zig_sdk/lib/libc/include/x86_64-macos.10-none/AvailabilityInternal.h'
'<output_base>/external/zig_sdk/lib/libc/include/x86_64-macos.10-none/sys/_pthread/_pthread_attr_t.h'
'<output_base>/external/zig_sdk/lib/libc/include/x86_64-macos.10-none/sys/_pthread/_pthread_cond_t.h'
'<output_base>/external/zig_sdk/lib/libc/include/x86_64-macos.10-none/sys/_pthread/_pthread_condattr_t.h'
'<output_base>/external/zig_sdk/lib/libc/include/x86_64-macos.10-none/sys/_pthread/_pthread_rwlock_t.h'
'<output_base>/external/zig_sdk/lib/libc/include/x86_64-macos.10-none/sys/_pthread/_pthread_rwlockattr_t.h'
'<output_base>/external/zig_sdk/lib/libc/include/x86_64-macos.10-none/sys/_pthread/_pthread_t.h'
Target @com_google_protobuf//:protoc failed to build
(<output_base> replaced manually to keep the description sane)
Note that the specific rule included in the error message will vary due
to parallelism, but the error is always the same and the missing paths
always have the same prefix (up to `x86_64-macos.10-none`).
After applying the patch, we confirmed that both native and cross compilations
works as expected and can properly build protoc.
Signed-off-by: Luis Holanda <luiscmholanda@gmail.com>
---
toolchain/private/defs.bzl | 1 +
1 file changed, 1 insertion(+)
diff --git a/toolchain/private/defs.bzl b/toolchain/private/defs.bzl
index 4478947..6a536bc 100644
--- a/toolchain/private/defs.bzl
+++ b/toolchain/private/defs.bzl
@@ -57,6 +57,7 @@ def _target_darwin(gocpu, zigcpu):
"libunwind/include",
# TODO: Define a toolchain for each minimum OS version
"libc/include/{}-macos.{}-gnu".format(zigcpu, min_os),
+ "libc/include/{}-macos.{}-none".format(zigcpu, min_os),
"libc/include/any-macos.{}-any".format(min_os),
"libc/include/any-macos-any",
],
--
2.36.1
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Wed, 27 Jul 2022 13:35:19 -0700 (PDT)
From: Luis Holanda <luiscmholanda@gmail.com>
To: ~motiejus/bazel-zig-cc@lists.sr.ht
Cc: Luis Holanda <luiscmholanda@gmail.com>
Subject: [PATCH 0/2] Support NixOS and others non-FHS Linux distributions
Date: Wed, 27 Jul 2022 17:33:51 -0300
Message-Id: <20220727203353.1672954-1-luiscmholanda@gmail.com>
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Currently, the project expects Bash to be in /bin/bash, but in certains
Linux distributions, namely NixOS, this path doesn't exist as all
binaries are stored inside /nix/store. The only thing that exists in
/bin in these distros is sh.
This patchset changes all the shebangs to /usr/bin/env bash, which will
work across all distributions.
The first patch changes only what is necessary to have Bazel run
correctly, while the second one changes the remaining scripts so that
contributors using NixOS can execute them without much problem.
Luis Holanda (2):
Support NixOS and others non-FHS Linux distros
misc: use /usr/bin/env in scripts
bin/mod-tidy | 2 +-
ci/lint | 4 ++--
ci/list_toolchains_platforms | 2 +-
ci/release | 2 +-
ci/test | 2 +-
contrib/makerel | 2 +-
release | 2 +-
test/c/test.sh | 2 +-
toolchain/defs.bzl | 2 +-
9 files changed, 10 insertions(+), 10 deletions(-)
--
2.36.1
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Wed, 27 Jul 2022 13:35:21 -0700 (PDT)
From: Luis Holanda <luiscmholanda@gmail.com>
To: ~motiejus/bazel-zig-cc@lists.sr.ht
Cc: Luis Holanda <luiscmholanda@gmail.com>
Subject: [PATCH 1/2] Support NixOS and others non-FHS Linux distros
Date: Wed, 27 Jul 2022 17:33:52 -0300
Message-Id: <20220727203353.1672954-2-luiscmholanda@gmail.com>
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As it expects Bash to be at `/bin/bash`, the current implementation
fails to execute on NixOS, given that there bash is in a non-standard
path (i.g. `/nix/store/<hash>-bash-interactive-<version>/bin/bash`).
This patch specifically changes `/bin/bash` paths to use `/usr/bin/env bash`,
which should give the correct path in every Unix system.
Signed-off-by: Luis Holanda <luiscmholanda@gmail.com>
---
test/c/test.sh | 2 +-
toolchain/defs.bzl | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/test/c/test.sh b/test/c/test.sh
index ee67dd3..7cfac79 100755
--- a/test/c/test.sh
+++ b/test/c/test.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
set -euo pipefail
diff --git a/toolchain/defs.bzl b/toolchain/defs.bzl
index d200588..f640aa4 100644
--- a/toolchain/defs.bzl
+++ b/toolchain/defs.bzl
@@ -76,7 +76,7 @@ def toolchains(
},
)
-ZIG_TOOL_WRAPPER = """#!/bin/bash
+ZIG_TOOL_WRAPPER = """#!/usr/bin/env bash
set -e
if [[ -n "$TMPDIR" ]]; then
--
2.36.1
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Wed, 27 Jul 2022 13:35:22 -0700 (PDT)
From: Luis Holanda <luiscmholanda@gmail.com>
To: ~motiejus/bazel-zig-cc@lists.sr.ht
Cc: Luis Holanda <luiscmholanda@gmail.com>
Subject: [PATCH 2/2] misc: use /usr/bin/env in scripts
Date: Wed, 27 Jul 2022 17:33:53 -0300
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This patch continues the work to support NixOS and others non-FHS
distributions by replacing instances of `/bin/bash` with
`/usr/bin/env bash`, which works correctly in more systems than the
former.
Signed-off-by: Luis Holanda <luiscmholanda@gmail.com>
---
bin/mod-tidy | 2 +-
ci/lint | 4 ++--
ci/list_toolchains_platforms | 2 +-
ci/release | 2 +-
ci/test | 2 +-
contrib/makerel | 2 +-
release | 2 +-
7 files changed, 8 insertions(+), 8 deletions(-)
diff --git a/bin/mod-tidy b/bin/mod-tidy
index 0c66f25..b3d0971 100755
--- a/bin/mod-tidy
+++ b/bin/mod-tidy
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
set -xeuo pipefail
diff --git a/ci/lint b/ci/lint
index 8c52243..f84eaa1 100755
--- a/ci/lint
+++ b/ci/lint
@@ -1,9 +1,9 @@
-#!/bin/bash
+#!/usr/bin/env bash
set -euo pipefail
REPO_ROOT=$(git rev-parse --show-toplevel)
cd "$REPO_ROOT"
# shellcheck disable=SC2046
-shellcheck -x $(awk '/#!\/bin\/(ba)?sh/&&FNR==1{print FILENAME}' $(git ls-files))
+shellcheck -x $(awk '/#!\/usr\/bin\/env/&&FNR==1{print FILENAME}' $(git ls-files))
find . \( -name 'WORKSPACE' -o -name 'BUILD' -o -name '*.bzl' \) -exec buildifier {} +
diff --git a/ci/list_toolchains_platforms b/ci/list_toolchains_platforms
index a7d0342..fae9ab8 100755
--- a/ci/list_toolchains_platforms
+++ b/ci/list_toolchains_platforms
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
set -euo pipefail
indent() { sed 's/^/ /'; }
diff --git a/ci/release b/ci/release
index 5149c64..b166828 100755
--- a/ci/release
+++ b/ci/release
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
set -xeuo pipefail
cd "$(git rev-parse --show-toplevel)"
diff --git a/ci/test b/ci/test
index 269510d..5aaac7a 100755
--- a/ci/test
+++ b/ci/test
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
set -xeuo pipefail
bazel test ...
diff --git a/contrib/makerel b/contrib/makerel
index 045b422..de614db 100755
--- a/contrib/makerel
+++ b/contrib/makerel
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
set -euo pipefail
zigdir=out/zig-x86_64-linux-musl-x86_64_v3
diff --git a/release b/release
index c3a4976..d49de26 100755
--- a/release
+++ b/release
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
set -xeuo pipefail
sign=(-u motiejus@jakstys.lt)
--
2.36.1
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From: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Date: Thu, 28 Jul 2022 12:47:05 -0700
Message-ID: <CAFVMu-pRq0L35-7tV54WQWNT_6=ZLQwbc54P=zD9dNg-BBc=GA@mail.gmail.com>
Subject: Re: [PATCH 0/2] Support NixOS and others non-FHS Linux distributions
To: Luis Holanda <luiscmholanda@gmail.com>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht
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On Wed, Jul 27, 2022 at 1:35 PM Luis Holanda <luiscmholanda@gmail.com> wrote:
>
> Currently, the project expects Bash to be in /bin/bash, but in certains
> Linux distributions, namely NixOS, this path doesn't exist as all
> binaries are stored inside /nix/store. The only thing that exists in
> /bin in these distros is sh.
>
> This patchset changes all the shebangs to /usr/bin/env bash, which will
> work across all distributions.
>
> The first patch changes only what is necessary to have Bazel run
> correctly, while the second one changes the remaining scripts so that
> contributors using NixOS can execute them without much problem.
>
> Luis Holanda (2):
> Support NixOS and others non-FHS Linux distros
> misc: use /usr/bin/env in scripts
Thanks, applied.
For next time don't sign-off -- that's unnecessary here.
Motiejus
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Subject: Re: [PATCH 0/2] Support NixOS and others non-FHS Linux distributions
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From: Luis Holanda <luiscmholanda@gmail.com>
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On 7/28/22 16:47, Motiejus Jakštys wrote:
> For next time don't sign-off -- that's unnecessary here.
Thanks for the advice, first contribution in Source Hut.
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Date: Fri, 12 Aug 2022 06:10:27 +0300
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Subject: bazel-zig-cc v0.9.0
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Hi all,
Bazel-zig-cc was released. Backwards-incompatible changes:
- Requires Go 1.19.
Notable changes:
- go 1.19 adds "--no-gc-sections" line [1], so we could clean up this
from bazel-zig-cc. This is why it is incompatible with older Go
versions.
- go 1.19 uses `--compress-debug-sections=zlib`, which Zig understands
since [2]. This results in significantly smaller binary sizes for
debug builds.
- support NixOS by Luis Holanda
- upgrade zig 0.10.0-dev.3529+44a6172ed
[1]: https://github.com/golang/go/commit/16e7613b2e1861b25c6549051337d1d8a850cf63
[2]: https://github.com/ziglang/zig/pull/11863
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Subject: Re: [PATCH] Add missing include path for MacOS platforms
To: ~motiejus/bazel-zig-cc@lists.sr.ht
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I found this thread while preparing to submit a patch for the very same
issue. Hopefully it can be merged!
One nit is that I believe the "{}-macos.{}-none" path you added should
be replacing "{}-macos.{}-gnu" instead of adding to it. If you look at
the Zig distribution (zig-macos-aarch64-0.10.0-dev.3659+e5e6eb983 in my
case) you can see there are no -gnu directories, so I believe that was
just a typo:
$ ls -d lib/zig/libc/include/*macos*
lib/zig/libc/include/aarch64-macos.11-none
lib/zig/libc/include/aarch64-macos.12-none
lib/zig/libc/include/any-macos-any
lib/zig/libc/include/any-macos.11-any
lib/zig/libc/include/any-macos.12-any
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lib/zig/libc/include/x86_64-macos.11-none
lib/zig/libc/include/x86_64-macos.12-none
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From: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Date: Tue, 23 Aug 2022 10:19:35 +0300
Message-ID: <CAFVMu-rbHhDWxb0kVi2zyPmU3JcXBc0ECOXQ+aytnGD2YOm8Tg@mail.gmail.com>
Subject: Re: [PATCH] Add missing include path for MacOS platforms
To: Mike Eastham <meastham@tecton.ai>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht, Luis Holanda <luiscmholanda@gmail.com>
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On Mon, Aug 22, 2022 at 5:28 PM Mike Eastham <meastham@tecton.ai> wrote:
>
> I found this thread while preparing to submit a patch for the very same
> issue. Hopefully it can be merged!
Hi Mike,
The subject like seems reasonable, but your submission is missing the
patch itself.
Thanks,
Motiejus
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From: Mike Eastham <meastham@tecton.ai>
Date: Tue, 23 Aug 2022 09:52:11 -0400
Message-ID: <CAMWUSyfyLU+CR8mCznvAgopdX+JzJUniFWNRYrq8x3Xz4AA4fA@mail.gmail.com>
Subject: Re: [PATCH] Add missing include path for MacOS platforms
To: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht, Luis Holanda <luiscmholanda@gmail.com>
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Hey Motiejus,
I was trying to reply to the patch submitted by Luis Holanda 26 days
ago[0], but I suppose I did something incorrectly. Sorry about that!
If it would be helpful for me to submit my own patch I would be happy to do so.
[0] https://lists.sr.ht/~motiejus/bazel-zig-cc/patches/34242
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From: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Date: Tue, 23 Aug 2022 18:13:48 +0300
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Subject: Re: [PATCH] Add missing include path for MacOS platforms
To: Mike Eastham <meastham@tecton.ai>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht, Luis Holanda <luiscmholanda@gmail.com>
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On Tue, Aug 23, 2022 at 4:52 PM Mike Eastham <meastham@tecton.ai> wrote:
>
> Hey Motiejus,
>
> I was trying to reply to the patch submitted by Luis Holanda 26 days
> ago[0], but I suppose I did something incorrectly. Sorry about that!
>
> If it would be helpful for me to submit my own patch I would be happy to do so.
Thanks, I didn't capture this first time. Applied Louis' patch and per
your suggestion removed the darwin-gnu ones.
Motiejus
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From: Mike Eastham <meastham@tecton.ai>
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Subject: Re: [PATCH] Add missing include path for MacOS platforms
To: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht, Luis Holanda <luiscmholanda@gmail.com>
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Thank you!
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From: ~kmicklas <kmicklas@git.sr.ht>
Date: Thu, 25 Aug 2022 19:24:38 +0100
Subject: [PATCH bazel-zig-cc] Support configuring cache prefix with an
environment variable
Message-ID: <166149887610.13477.8916629882571649449-0@git.sr.ht>
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From: Ken Micklas <kmicklas@uber.com>
The user may want to build with `--sandbox_tmpfs_path=3D/tmp`, in which
case the Zig cache will not be shared between sandboxes, massively
slowing down the build. With this feature, the user can pass flags
like `--repo_env=3DBAZEL_ZIG_CC_CACHE_PREFIX=3D$HOME/.cache/bazel-zig-cc`
together with `--sandbox_writable_path=3D$HOME/.cache/bazel-zig-cc` to
put the cache somewhere else which can be shared between sandboxes.
---
toolchain/defs.bzl | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/toolchain/defs.bzl b/toolchain/defs.bzl
index 965cf22..c8b5be0 100644
--- a/toolchain/defs.bzl
+++ b/toolchain/defs.bzl
@@ -79,7 +79,9 @@ def toolchains(
ZIG_TOOL_WRAPPER =3D """#!/usr/bin/env bash
set -e
=20
-if [[ -n "$TMPDIR" ]]; then
+if [[ -n "{cache_prefix}" ]]; then
+ _cache_prefix=3D"{cache_prefix}"
+elif [[ -n "$TMPDIR" ]]; then
_cache_prefix=3D$TMPDIR
elif [[ -n "$HOME" ]]; then
if [[ "$(uname)" =3D Darwin ]]; then
@@ -149,6 +151,7 @@ def _zig_repository_impl(repository_ctx):
zig_tool_wrapper =3D ZIG_TOOL_WRAPPER.format(
zig =3D str(repository_ctx.path("zig")),
zig_tool =3D zig_tool,
+ cache_prefix =3D repository_ctx.os.environ.get("BAZEL_ZIG_CC_CAC=
HE_PREFIX", ""),
)
if os =3D=3D "windows":
zig_tool_wrapper =3D ZIG_TOOL_WRAPPER_WINDOWS.format(
--=20
2.34.4
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Subject: [bazel-zig-cc/patches/.build.yml] build success
To: "~kmicklas" <git@kmicklas.com>
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bazel-zig-cc/patches/.build.yml: SUCCESS in 17m14s
[Support configuring cache prefix with an environment variable][0] from [~k=
micklas][1]
[0]: https://lists.sr.ht/~motiejus/bazel-zig-cc/patches/34941
[1]: mailto:git@kmicklas.com
=E2=9C=93 #831878 SUCCESS bazel-zig-cc/patches/.build.yml https://builds.sr=
.ht/~motiejus/job/831878
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From: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Date: Fri, 26 Aug 2022 11:08:28 +0300
Message-ID: <CAFVMu-oHOnGk7f3joqxPKcinZOR2C-PCrSc9C1dVz70a7Je8dQ@mail.gmail.com>
Subject: Re: [PATCH bazel-zig-cc] Support configuring cache prefix with an
environment variable
To: "~kmicklas" <git@kmicklas.com>, Fabian Hahn <fabian@hahn.graphics>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht
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On Fri, Aug 26, 2022 at 10:28 AM ~kmicklas <kmicklas@git.sr.ht> wrote:
>
> From: Ken Micklas <kmicklas@uber.com>
>
> The user may want to build with `--sandbox_tmpfs_path=/tmp`, in which
> case the Zig cache will not be shared between sandboxes, massively
> slowing down the build. With this feature, the user can pass flags
> like `--repo_env=BAZEL_ZIG_CC_CACHE_PREFIX=$HOME/.cache/bazel-zig-cc`
> together with `--sandbox_writable_path=$HOME/.cache/bazel-zig-cc` to
> put the cache somewhere else which can be shared between sandboxes.
Thanks, applied.
Fabian, would you like to keep compatibility and do this[1] for Windows?
[1]: https://git.sr.ht/~motiejus/bazel-zig-cc/commit/15f957859146deaf524bbdf1a4b537124b305405
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Date: Fri, 26 Aug 2022 11:38:17 +0300
Message-ID: <CAFVMu-rUhnfR3_86szyfw2XkOZfMo5zcDuexzzpyxinKH8sM8A@mail.gmail.com>
Subject: bazel-zig-cc v0.9.1
To: ~motiejus/bazel-zig-cc@lists.sr.ht
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Hi all,
I just released v0.9.1. Changes:
- [Ken Micklas] Support configuring cache prefix with an environment variable
- [Luis Holanda] Add missing include path for MacOS platforms
This does no longer hardcode (on non-windows platforms at least) the
/tmp/bazel-zig-cc; you can point the cache directory elsewhere.
Zig landed two relevant changes to bazel-zig-cc:
- https://github.com/ziglang/zig/pull/12629 : add some resolv stubs.
- https://github.com/ziglang/zig/pull/12605 : artifacts of `zig cc`
are no longer cached by zig. This avoids double-caching for most
object files, saving disk space.
Motiejus
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Date: Fri, 26 Aug 2022 10:06:56 +0100
From: fabian@hahn.graphics
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Cc: ~kmicklas <git@kmicklas.com>, ~motiejus/bazel-zig-cc@lists.sr.ht
Subject: Re: [PATCH bazel-zig-cc] Support configuring cache prefix with an
environment variable
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On 2022-08-26 09:08, Motiejus Jakštys wrote:
> Fabian, would you like to keep compatibility and do this[1] for
> Windows?
Sure, I'll take a look at it this weekend.
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To: ~motiejus/bazel-zig-cc@lists.sr.ht
Cc: Fabian Hahn <fabian@hahn.graphics>
Subject: [PATCH bazel-zig-cc] add cache prefix configuration for Windows
Date: Sat, 27 Aug 2022 16:21:08 +0100
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---
toolchain/defs.bzl | 30 +++++++++++++++++++++++++-----
1 file changed, 25 insertions(+), 5 deletions(-)
diff --git a/toolchain/defs.bzl b/toolchain/defs.bzl
index a95f76e..53fd161 100644
--- a/toolchain/defs.bzl
+++ b/toolchain/defs.bzl
@@ -101,7 +101,20 @@ export ZIG_GLOBAL_CACHE_DIR=$ZIG_LOCAL_CACHE_DIR
exec "{zig}" "{zig_tool}" "$@"
"""
-ZIG_TOOL_WRAPPER_WINDOWS = """@echo off
+ZIG_TOOL_WRAPPER_WINDOWS_CACHE_KNOWN = """@echo off
+set ZIG_LOCAL_CACHE_DIR={cache_prefix}\\bazel-zig-cc
+set ZIG_GLOBAL_CACHE_DIR=%ZIG_LOCAL_CACHE_DIR%
+"{zig}" "{zig_tool}" %*
+"""
+
+ZIG_TOOL_WRAPPER_WINDOWS_CACHE_GUESS = """@echo off
+if exist "%TMP%\\*" goto :usertmp
+set ZIG_LOCAL_CACHE_DIR=C:\\Temp\\bazel-zig-cc
+goto zig
+:usertmp
+set ZIG_LOCAL_CACHE_DIR=%TMP%\\bazel-zig-cc
+:zig
+set ZIG_GLOBAL_CACHE_DIR=%ZIG_LOCAL_CACHE_DIR%
"{zig}" "{zig_tool}" %*
"""
@@ -152,10 +165,17 @@ def _zig_repository_impl(repository_ctx):
for zig_tool in _ZIG_TOOLS:
cache_prefix = repository_ctx.os.environ.get("BAZEL_ZIG_CC_CACHE_PREFIX", "")
if os == "windows":
- zig_tool_wrapper = ZIG_TOOL_WRAPPER_WINDOWS.format(
- zig = str(repository_ctx.path("zig")).replace("/", "\\") + ".exe",
- zig_tool = zig_tool,
- )
+ if cache_prefix:
+ zig_tool_wrapper = ZIG_TOOL_WRAPPER_WINDOWS_CACHE_KNOWN.format(
+ zig = str(repository_ctx.path("zig")).replace("/", "\\") + ".exe",
+ zig_tool = zig_tool,
+ cache_prefix = cache_prefix,
+ )
+ else:
+ zig_tool_wrapper = ZIG_TOOL_WRAPPER_WINDOWS_CACHE_GUESS.format(
+ zig = str(repository_ctx.path("zig")).replace("/", "\\") + ".exe",
+ zig_tool = zig_tool,
+ )
elif cache_prefix:
zig_tool_wrapper = ZIG_TOOL_WRAPPER_CACHE_KNOWN.format(
zig = str(repository_ctx.path("zig")),
--
2.25.1
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Subject: [bazel-zig-cc/patches/.build.yml] build success
To: "Fabian Hahn" <fabian@hahn.graphics>
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bazel-zig-cc/patches/.build.yml: SUCCESS in 18m16s
[add cache prefix configuration for Windows][0] from [Fabian Hahn][1]
[0]: https://lists.sr.ht/~motiejus/bazel-zig-cc/patches/34959
[1]: mailto:fabian@hahn.graphics
=E2=9C=93 #832843 SUCCESS bazel-zig-cc/patches/.build.yml https://builds.sr=
.ht/~motiejus/job/832843
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Date: Mon, 29 Aug 2022 14:46:38 +0300
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Subject: Re: [PATCH bazel-zig-cc] add cache prefix configuration for Windows
To: Fabian Hahn <fabian@hahn.graphics>
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On Sat, Aug 27, 2022 at 6:21 PM Fabian Hahn <fabian@hahn.graphics> wrote:
>
> ---
> toolchain/defs.bzl | 30 +++++++++++++++++++++++++-----
> 1 file changed, 25 insertions(+), 5 deletions(-)
>
Hi Fabian,
I've applied your diff and cleaned up[1][2] the accumulated mess, then
pushed to main. If I broke anything on Windows in the process, please
ping me, preferably in the next couple of days.
Thanks!
Motiejus
[1]: https://git.sr.ht/~motiejus/bazel-zig-cc/commit/e861c5b4bedb752adbdca9bfb863e9cc131c2a5c
[2]: https://git.sr.ht/~motiejus/bazel-zig-cc/commit/342b239bb90e3bd8c35e64d6bc14924600e980c5
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From: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Date: Tue, 30 Aug 2022 06:07:18 +0300
Message-ID: <CAFVMu-o9PQqhA0tN_8qC8OhEu5Rh4_W+djkHibRBKnJHtz_z3A@mail.gmail.com>
Subject: Re: bazel-zig-cc + rust
To: Kevin King <4kevinking@gmail.com>, ~motiejus/bazel-zig-cc@lists.sr.ht,
Luis Holanda <luiscmholanda@gmail.com>
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On Tue, Aug 30, 2022 at 5:48 AM Kevin King <4kevinking@gmail.com> wrote:
>
> Hi Motiejus,
Hi Kevin!
> Thank you for the awesome bazel integration! I wasn't sure how to reach o=
ut so let me know if there's a better way.
Use the mailing list. :)
> I am working on a bazel+rust+wasm project and was looking to use zig to c=
ross-compile a rust web server to linux/{arm,amd}. The only problem I ran i=
nto with bazel-zig-cc was that the rust does not pass its env down to the l=
inker process, and so the #!/usr/bin/env sh line fails. I was able to fix i=
t by changing it to #!/bin/sh (and then everything worked perfectly!), but =
I understand that things like nix put sh elsewhere.
That was /usr/bin/bash originally, then /usr/bin/env bash, then I
removed the bashisms and changed to /usr/bin/env sh. Louis, does NixOS
suppot /bin/sh?
Kevin, why does /usr/bin/env sh fail? What is the error message?
That's quite curious, since that would imply /usr/bin/env does not
exist, or sh is not in $PATH.
> Can you think of any potential solutions that would work for both rust an=
d nix?
Let's try to find out.
Motiejus
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From: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Date: Tue, 30 Aug 2022 09:20:41 +0300
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Subject: Re: bazel-zig-cc + rust
To: Kevin King <4kevinking@gmail.com>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht, Luis Holanda <luiscmholanda@gmail.com>
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On Tue, Aug 30, 2022 at 6:58 AM Kevin King <4kevinking@gmail.com> wrote:
>
> The error I get is
>
> linking with `/private/var/tmp/_bazel_kevin/c782d9784982eee1866a2e1ae5f6f353/external/zig_sdk/tools/c++` failed: exit status: 127
> [...]
> = note: env: sh: No such file or directory
>
> This appears to mean /usr/bin/env is executed correctly, but env itself can't find sh. Linking succeeds when I change the zig wrapper to use /bin/sh directly, leading me to believe rust does not pass PATH down to the linker.
I asked in #zig:libera.chat, and Andrew pointed out that `/bin/sh` and
`/usr/bin/env` are the only two files in `/bin` and `/usr/bin`
respectively. So `#!/bin/sh` will work both NixOS and in your case,
since it's an absolute path.
I will make the change in bazel-zig-cc later today.
Motiejus
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From: Kevin King <4kevinking@gmail.com>
Date: Mon, 29 Aug 2022 23:22:37 -0700
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Subject: Re: bazel-zig-cc + rust
To: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht, Luis Holanda <luiscmholanda@gmail.com>
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Oh perfect! I'm glad there was a simple fix :)
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From: =?UTF-8?B?RGFuw61lbCBQdXJraMO6cw==?= <danielp@avilabs.is>
Date: Fri, 9 Sep 2022 19:52:39 +0000
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Subject: Using with rules_rust
To: ~motiejus/bazel-zig-cc@lists.sr.ht
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I've been trying to build our Rust code with these rules as the C/C++
toolchain but I'm encountering an issue.
When I try to build an project that depends on
https://crates.io/crates/async-trait I get the following error:
/workspace/bazel_output_base/execroot/monorepo/bazel-out/k8-opt-exec-2B5CBBC6/bin/external/cargo__async-stream-impl-0.3.3/libasync_stream_impl-1922333755.so:
cannot allocate memory in static TLS block
There is a similar issue posted here when using cargo-zig:
https://github.com/messense/cargo-zigbuild/issues/4
I'm having a hard time figuring out if it's possible to fix this using
rules_rust and these rules. I was wondering if
anybody in this mailing list had found a way to get past this issue?
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From: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Date: Sat, 10 Sep 2022 07:52:25 +0300
Message-ID: <CAFVMu-qx2RSRKRBM86BVukecjBE-K1KL5ooSRtLW7uGxzAMe1w@mail.gmail.com>
Subject: Re: Using with rules_rust
To: =?UTF-8?B?RGFuw61lbCBQdXJraMO6cw==?= <danielp@avilabs.is>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht
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On Fri, Sep 9, 2022 at 10:52 PM Dan=C3=ADel Purkh=C3=BAs <danielp@avilabs.i=
s> wrote:
>
> I've been trying to build our Rust code with these rules as the C/C++
> toolchain but I'm encountering an issue.
> When I try to build an project that depends on
> https://crates.io/crates/async-trait I get the following error:
>
> /workspace/bazel_output_base/execroot/monorepo/bazel-out/k8-opt-exec-2B5C=
BBC6/bin/external/cargo__async-stream-impl-0.3.3/libasync_stream_impl-19223=
33755.so:
> cannot allocate memory in static TLS block
>
> There is a similar issue posted here when using cargo-zig:
>
> https://github.com/messense/cargo-zigbuild/issues/4
>
> I'm having a hard time figuring out if it's possible to fix this using
> rules_rust and these rules. I was wondering if
> anybody in this mailing list had found a way to get past this issue?
Hi Dan=C3=ADel,
Both cargo-zigbuild and bazel-zig-cc are thin wrappers on top of zig
cc, so the underlying mechanism (zig cc) is the one to look out for.
The best course of action would be to make a minimal example (e.g. a
single test.rs) and peel off the build layers (bazel-zig-cc or
cargo-zigbuild; whichever is easier) and file an issue in ziglang/zig.
If you have a minimal rust example that exposes this problem, "rustc"
and "zig cc" commands to reproduce it (no cargo or bazel), that will
go a long way for whoever is interested in picking this up to
understand what happened and fix this.
Hope that helps,
Motiejus
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From: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Date: Mon, 12 Sep 2022 13:52:53 +0300
Message-ID: <CAFVMu-qPoYBqA0UJofqmkeJ-D0ZU4P-rH8Rh8L78zhLRyJdNnQ@mail.gmail.com>
Subject: bazel-zig-cc v0.9.2
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Hi all,
v0.9.2 brings in some changes w.r.t. BAZEL_ZIG_CC_CACHE_PREFIX:
- make it work on Windows: thanks Fabian Hahn.
- make repository_rule depend on it, so artifacts that depend on it
get invalidated. Thanks Laurynai.
And makes bazel-zig-cc work on NixOS. For that I thank Luis Holanda
and Andrew Kelley.
Motiejus
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From: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Date: Mon, 12 Sep 2022 13:56:39 +0300
Message-ID: <CAFVMu-p0GguWV_7g_DFHgTC27PgUSp7ayxtPda4LSLnY_3VU8Q@mail.gmail.com>
Subject: Re: bazel-zig-cc v0.9.2
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On Mon, Sep 12, 2022 at 1:52 PM Motiejus Jak=C5=A1tys <motiejus@jakstys.lt>=
wrote:
>
> Hi all,
>
> v0.9.2 brings in <...>
One thing I forgot: if you used musl, bazel-zig-cc used to add "-s -w"
to LDFLAGS. That was wrong, added by me a while ago[1]. This is what
happens when I don't get code reviews. Well, it's fixed now: the musl
binaries produced by bazel-zig-cc will no longer be stripped.
[1]: https://git.sr.ht/~motiejus/bazel-zig-cc/commit/58a04fbfec10d98ac5cd8e=
e44df441146085b780
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Thu, 15 Sep 2022 14:40:41 +0000 (UTC)
From: ~kmicklas <kmicklas@git.sr.ht>
Date: Thu, 15 Sep 2022 14:40:41 +0000
Subject: [PATCH bazel-zig-cc 0/1] Fix include root path for macos-aarch64
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Despite the odd inconsistency between OS/arch, the others appear correct
from a latest nightly.
Ken Micklas (1):
Fix include root path for macos-aarch64
toolchain/defs.bzl | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--
2.34.4
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From: ~kmicklas <kmicklas@git.sr.ht>
Date: Thu, 15 Sep 2022 15:37:35 +0100
Subject: [PATCH bazel-zig-cc 1/1] Fix include root path for macos-aarch64
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From: Ken Micklas <kmicklas@uber.com>
---
toolchain/defs.bzl | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/toolchain/defs.bzl b/toolchain/defs.bzl
index 71214f6..f72412d 100644
--- a/toolchain/defs.bzl
+++ b/toolchain/defs.bzl
@@ -70,7 +70,7 @@ def toolchains(
host_platform_include_root = {
"linux-aarch64": "lib/zig/",
"linux-x86_64": "lib/",
- "macos-aarch64": "lib/zig/",
+ "macos-aarch64": "lib/",
"macos-x86_64": "lib/zig/",
"windows-x86_64": "lib/",
},
--
2.34.4
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Subject: [bazel-zig-cc/patches/.build.yml] build success
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bazel-zig-cc/patches/.build.yml: SUCCESS in 17m45s
[Fix include root path for macos-aarch64][0] from [~kmicklas][1]
[0]: https://lists.sr.ht/~motiejus/bazel-zig-cc/patches/35334
[1]: mailto:git@kmicklas.com
=E2=9C=93 #845320 SUCCESS bazel-zig-cc/patches/.build.yml https://builds.sr=
.ht/~motiejus/job/845320
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Thu, 15 Sep 2022 18:30:04 +0000 (UTC)
From: ~kmicklas <kmicklas@git.sr.ht>
Date: Thu, 15 Sep 2022 18:30:04 +0000
Subject: [PATCH bazel-zig-cc 0/1] Move Label dependencies above archive
fetching to reduce restarts
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Before this, when running the repository rule, you might notice the
Bazel output say it was extracting the SDK archive ~7 times. Each time a
label dependency is used, it would restart the whole rule with the new
dependency. Now, the restarts technically still happen, but are not
noticeable since they occur before doing any substantial work.
Ken Micklas (1):
Move Label dependencies above archive fetching to reduce restarts
toolchain/defs.bzl | 53 +++++++++++++++++++++++++---------------------
1 file changed, 29 insertions(+), 24 deletions(-)
--
2.34.4
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Date: Thu, 15 Sep 2022 19:20:21 +0100
Subject: [PATCH bazel-zig-cc 1/1] Move Label dependencies above archive
fetching to reduce restarts
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From: Ken Micklas <kmicklas@uber.com>
---
toolchain/defs.bzl | 53 +++++++++++++++++++++++++---------------------
1 file changed, 29 insertions(+), 24 deletions(-)
diff --git a/toolchain/defs.bzl b/toolchain/defs.bzl
index 71214f6..ceddb70 100644
--- a/toolchain/defs.bzl
+++ b/toolchain/defs.bzl
@@ -170,6 +170,35 @@ def _zig_repository_impl(repository_ctx):
"host_platform": host_platform,
}
=20
+ # Fetch Label dependencies before doing download/extract.
+ # The Bazel docs are not very clear about this behavior but see:
+ # https://bazel.build/extending/repo#when_is_the_implementation_function=
_executed
+ # and a related rules_go PR:
+ # https://github.com/bazelbuild/bazel-gazelle/pull/1206
+ for dest, src in {
+ "platform/BUILD": "//toolchain/platform:BUILD",
+ "toolchain/BUILD": "//toolchain/toolchain:BUILD",
+ "libc/BUILD": "//toolchain/libc:BUILD",
+ "libc_aware/platform/BUILD": "//toolchain/libc_aware/platform:BUILD",
+ "libc_aware/toolchain/BUILD": "//toolchain/libc_aware/toolchain:BUIL=
D",
+ }.items():
+ repository_ctx.symlink(Label(src), dest)
+
+ for dest, src in {
+ "BUILD": "//toolchain:BUILD.sdk.bazel",
+ "private/BUILD": "//toolchain/private:BUILD.sdk.bazel",
+ }.items():
+ repository_ctx.template(
+ dest,
+ Label(src),
+ executable =3D False,
+ substitutions =3D {
+ "{absolute_path}": _quote(str(repository_ctx.path(""))),
+ "{os}": _quote(os),
+ "{zig_include_root}": _quote(zig_include_root),
+ },
+ )
+
urls =3D [uf.format(**format_vars) for uf in repository_ctx.attr.url_for=
mats]
repository_ctx.download_and_extract(
auth =3D use_netrc(read_user_netrc(repository_ctx), urls, {}),
@@ -200,30 +229,6 @@ def _zig_repository_impl(repository_ctx):
content =3D _fcntl_h,
)
=20
- for dest, src in {
- "platform/BUILD": "//toolchain/platform:BUILD",
- "toolchain/BUILD": "//toolchain/toolchain:BUILD",
- "libc/BUILD": "//toolchain/libc:BUILD",
- "libc_aware/platform/BUILD": "//toolchain/libc_aware/platform:BUILD",
- "libc_aware/toolchain/BUILD": "//toolchain/libc_aware/toolchain:BUIL=
D",
- }.items():
- repository_ctx.symlink(Label(src), dest)
-
- for dest, src in {
- "BUILD": "//toolchain:BUILD.sdk.bazel",
- "private/BUILD": "//toolchain/private:BUILD.sdk.bazel",
- }.items():
- repository_ctx.template(
- dest,
- Label(src),
- executable =3D False,
- substitutions =3D {
- "{absolute_path}": _quote(str(repository_ctx.path(""))),
- "{os}": _quote(os),
- "{zig_include_root}": _quote(zig_include_root),
- },
- )
-
zig_repository =3D repository_rule(
attrs =3D {
"version": attr.string(),
--=20
2.34.4
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bazel-zig-cc/patches/.build.yml: SUCCESS in 16m52s
[Move Label dependencies above archive fetching to reduce restarts][0] from=
[~kmicklas][1]
[0]: https://lists.sr.ht/~motiejus/bazel-zig-cc/patches/35345
[1]: mailto:git@kmicklas.com
=E2=9C=93 #845473 SUCCESS bazel-zig-cc/patches/.build.yml https://builds.sr=
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From: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Date: Thu, 15 Sep 2022 22:20:27 +0300
Message-ID: <CAFVMu-rBE6jZQWi0tjhrFqgL-ZjnsHnS9TjFv94JShaFOeVYiQ@mail.gmail.com>
Subject: Re: [PATCH bazel-zig-cc 1/1] Move Label dependencies above archive
fetching to reduce restarts
To: "~kmicklas" <git@kmicklas.com>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht, kmicklas@uber.com
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On Thu, Sep 15, 2022 at 9:30 PM ~kmicklas <kmicklas@git.sr.ht> wrote:
>
> From: Ken Micklas <kmicklas@uber.com>
>
> ---
> toolchain/defs.bzl | 53 +++++++++++++++++++++++++---------------------
> 1 file changed, 29 insertions(+), 24 deletions(-)
Applied, thanks!
Motiejus
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From: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Date: Thu, 15 Sep 2022 22:23:41 +0300
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Subject: Re: [PATCH bazel-zig-cc 1/1] Fix include root path for macos-aarch64
To: "~kmicklas" <git@kmicklas.com>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht, kmicklas@uber.com
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On Thu, Sep 15, 2022 at 5:40 PM ~kmicklas <kmicklas@git.sr.ht> wrote:
>
> From: Ken Micklas <kmicklas@uber.com>
>
> ---
> toolchain/defs.bzl | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
Thanks, applied. Though those will likely need to be revised soon -- I
remember reading somewhere that those prefixes will be made consistent
at some point. It's either landed, or there is an open PR.
Motiejus
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From: ~motiejus <motiejus@git.sr.ht>
Date: Tue, 27 Sep 2022 07:24:28 +0000
MIME-Version: 1.0
Subject: [PATCH bazel-zig-cc 0/2] use relative paths
Message-ID: <166426346839.12781.6953968828011257615-0@git.sr.ht>
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This patchset changes absolute paths to tools to relative paths. Work
was started by @kmicklas and completed by myself and @laurynasl. Please
review.
Currently, with absolute paths, bazel's remote cache keys are different
between two workspaces, busting our remote cache. We hope (did not try
yet) that this will normalize them and fix our cache hit ratios.
Fabian, this does not work on Windows yet; if you want to chime in, I
will wait a couple of days for your patch before I cut a release.
1.0 is coming soon.
Ken Micklas (1):
WIP: use relative paths for tools
Motiejus Jak=C5=A1tys (1):
defs: fix import paths
README.md | 2 +-
toolchain/BUILD.sdk.bazel | 9 +++++++--
toolchain/defs.bzl | 29 +++++++++++++++++++++++++----
toolchain/private/BUILD.sdk.bazel | 7 -------
toolchain/private/cc_toolchains.bzl | 17 ++++++++---------
toolchain/private/defs.bzl | 29 ++++++++++++++---------------
toolchain/toolchain/defs.bzl | 4 ++--
7 files changed, 57 insertions(+), 40 deletions(-)
delete mode 100644 toolchain/private/BUILD.sdk.bazel
--=20
2.34.4
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From: ~motiejus <motiejus@git.sr.ht>
Date: Wed, 21 Sep 2022 11:14:29 +0100
Subject: [PATCH bazel-zig-cc 1/2] WIP: use relative paths for tools
Message-ID: <166426346839.12781.6953968828011257615-1@git.sr.ht>
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To: ~motiejus/bazel-zig-cc@lists.sr.ht, fabian@hahn.graphics
Cc: laurynasl@uber.com, mail@kmicklas.com
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From: Ken Micklas <kmicklas@uber.com>
---
README.md | 2 +-
toolchain/BUILD.sdk.bazel | 9 +++++++--
toolchain/defs.bzl | 5 +++--
toolchain/private/BUILD.sdk.bazel | 7 -------
toolchain/private/cc_toolchains.bzl | 12 +++++++-----
toolchain/toolchain/defs.bzl | 4 ++--
6 files changed, 20 insertions(+), 19 deletions(-)
delete mode 100644 toolchain/private/BUILD.sdk.bazel
diff --git a/README.md b/README.md
index 262b88b..266952f 100644
--- a/README.md
+++ b/README.md
@@ -110,7 +110,7 @@ toolchain(
generator_location =3D "toolchain/BUILD:7:19",
toolchain_type =3D "@bazel_tools//tools/cpp:toolchain_type",
target_compatible_with =3D ["@platforms//os:linux", "@platforms//cpu:aarch=
64", "@zig_sdk//libc:unconstrained"],
- toolchain =3D "@zig_sdk//private:aarch64-linux-musl_cc",
+ toolchain =3D "@zig_sdk//:aarch64-linux-musl_cc",
)
```
=20
diff --git a/toolchain/BUILD.sdk.bazel b/toolchain/BUILD.sdk.bazel
index e1505b1..ef5fd5f 100644
--- a/toolchain/BUILD.sdk.bazel
+++ b/toolchain/BUILD.sdk.bazel
@@ -1,11 +1,10 @@
load("@bazel-zig-cc//toolchain:defs.bzl", "declare_files")
+load("@bazel-zig-cc//toolchain/private:cc_toolchains.bzl", "declare_cc_toolc=
hains")
=20
package(
default_visibility =3D ["//visibility:public"],
)
=20
-
-
declare_files(
os =3D {os},
zig_include_root =3D {zig_include_root},
@@ -15,3 +14,9 @@ exports_files([
"glibc-hacks/fcntl.map",
"glibc-hacks/glibchack-fcntl.h",
])
+
+declare_cc_toolchains(
+ os =3D {os},
+ absolute_path =3D {absolute_path},
+ zig_include_root =3D {zig_include_root},
+)
diff --git a/toolchain/defs.bzl b/toolchain/defs.bzl
index 797e4fe..f0e6a72 100644
--- a/toolchain/defs.bzl
+++ b/toolchain/defs.bzl
@@ -186,14 +186,14 @@ def _zig_repository_impl(repository_ctx):
=20
for dest, src in {
"BUILD": "//toolchain:BUILD.sdk.bazel",
- "private/BUILD": "//toolchain/private:BUILD.sdk.bazel",
+ # "private/BUILD": "//toolchain/private:BUILD.sdk.bazel",
}.items():
repository_ctx.template(
dest,
Label(src),
executable =3D False,
substitutions =3D {
- "{absolute_path}": _quote(str(repository_ctx.path(""))),
+ "{absolute_path}": _quote("external/zig_sdk"),
"{os}": _quote(os),
"{zig_include_root}": _quote(zig_include_root),
},
@@ -246,6 +246,7 @@ def filegroup(name, **kwargs):
return ":" + name
=20
def declare_files(os, zig_include_root):
+ filegroup(name =3D "all", srcs =3D native.glob(["**"]))
filegroup(name =3D "empty")
if os =3D=3D "windows":
native.exports_files(["zig.exe"], visibility =3D ["//visibility:publ=
ic"])
diff --git a/toolchain/private/BUILD.sdk.bazel b/toolchain/private/BUILD.sdk.=
bazel
deleted file mode 100644
index 3e7c23e..0000000
--- a/toolchain/private/BUILD.sdk.bazel
+++ /dev/null
@@ -1,7 +0,0 @@
-load("@bazel-zig-cc//toolchain/private:cc_toolchains.bzl", "declare_cc_toolc=
hains")
-
-declare_cc_toolchains(
- os =3D {os},
- absolute_path =3D {absolute_path},
- zig_include_root =3D {zig_include_root},
-)
diff --git a/toolchain/private/cc_toolchains.bzl b/toolchain/private/cc_toolc=
hains.bzl
index 724cbda..6b8b3e6 100644
--- a/toolchain/private/cc_toolchains.bzl
+++ b/toolchain/private/cc_toolchains.bzl
@@ -29,7 +29,7 @@ def declare_cc_toolchains(os, absolute_path, zig_include_ro=
ot):
absolute_tool_paths[name] =3D path
continue
tool_path =3D zig_tool_path(os).format(zig_tool =3D path)
- absolute_tool_paths[name] =3D "%s/%s" % (absolute_path, tool_pat=
h)
+ absolute_tool_paths[name] =3D tool_path
=20
linkopts =3D target_config.linkopts
dynamic_library_linkopts =3D target_config.dynamic_library_linkopts
@@ -53,18 +53,20 @@ def declare_cc_toolchains(os, absolute_path, zig_include_=
root):
compiler =3D "clang",
abi_version =3D "unknown",
abi_libc_version =3D "unknown",
+ # visibility =3D ["//visibility:private"],
)
=20
native.cc_toolchain(
name =3D zigtarget + "_cc",
toolchain_identifier =3D zigtarget + "-toolchain",
toolchain_config =3D ":%s_cc_config" % zigtarget,
- all_files =3D "@zig_sdk//:zig",
- ar_files =3D "@zig_sdk//:zig",
- compiler_files =3D "@zig_sdk//:zig",
- linker_files =3D "@zig_sdk//:zig",
+ all_files =3D "@zig_sdk//:all",
+ ar_files =3D "@zig_sdk//:all",
+ compiler_files =3D "@zig_sdk//:all",
+ linker_files =3D "@zig_sdk//:all",
dwp_files =3D "@zig_sdk//:empty",
objcopy_files =3D "@zig_sdk//:empty",
strip_files =3D "@zig_sdk//:empty",
supports_param_files =3D 0,
+ # visibility =3D ["//visibility:private"],
)
diff --git a/toolchain/toolchain/defs.bzl b/toolchain/toolchain/defs.bzl
index 1d99a61..24a90cc 100644
--- a/toolchain/toolchain/defs.bzl
+++ b/toolchain/toolchain/defs.bzl
@@ -32,7 +32,7 @@ def _declare_toolchain(gotarget, zigtarget, target_compatib=
le_with):
name =3D gotarget,
exec_compatible_with =3D None,
target_compatible_with =3D target_compatible_with,
- toolchain =3D "@zig_sdk//private:%s_cc" % zigtarget,
+ toolchain =3D "@zig_sdk//:%s_cc" % zigtarget,
toolchain_type =3D "@bazel_tools//tools/cpp:toolchain_type",
)
=20
@@ -41,6 +41,6 @@ def _declare_toolchain(gotarget, zigtarget, target_compatib=
le_with):
name =3D zigtarget,
exec_compatible_with =3D None,
target_compatible_with =3D target_compatible_with,
- toolchain =3D "@zig_sdk//private:%s_cc" % zigtarget,
+ toolchain =3D "@zig_sdk//:%s_cc" % zigtarget,
toolchain_type =3D "@bazel_tools//tools/cpp:toolchain_type",
)
--=20
2.34.4
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From: ~motiejus <motiejus@git.sr.ht>
Date: Mon, 26 Sep 2022 10:14:08 +0300
Subject: [PATCH bazel-zig-cc 2/2] defs: fix import paths
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To: ~motiejus/bazel-zig-cc@lists.sr.ht, fabian@hahn.graphics
Cc: laurynasl@uber.com, mail@kmicklas.com
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From: Motiejus Jak=C5=A1tys <motiejus@uber.com>
Empirically these need to come from most specfic to least specific.
The error message is as follows:
In file included from test/c/main.c:1:
In file included from external/zig_sdk/lib/libcxx/include/stdio.h:107:
In file included from external/zig_sdk/lib/libc/include/generic-glibc/std=
io.h:38:
external/zig_sdk/lib/libc/include/generic-glibc/bits/types.h:139:3: error:
# error
^
external/zig_sdk/lib/libc/include/generic-glibc/bits/types.h:145:1: error=
: unknown type name '__STD_TYPE'
__STD_TYPE __DEV_T_TYPE __dev_t; /* Type of device numbers. */
Dissected `generic-glibc/bits/types.h:#error`:
#if __WORDSIZE =3D=3D 32
<...>
# define __STD_TYPE __extension__ typedef
#elif __WORDSIZE =3D=3D 64
<...>
# define __STD_TYPE typedef
#else
# error
#endif
So we do not have the `__WORDSIZE`. Where does that come from? Probably from a
directory that has an `x86_64` in it. How does that get included? Let's start
with `lib/libcxx/include/stdio.h`:
16 #include_next <stdio.h>
Now previously our `c++` command line looked like this:
external/zig_sdk/tools/c++ \
<...>
-Iexternal/zig_sdk/lib/include \
-Iexternal/zig_sdk/lib/libcxx/include \
-Iexternal/zig_sdk/lib/libcxxabi/include \
-Iexternal/zig_sdk/lib/libunwind/include \
-Iexternal/zig_sdk/lib/libc/include/generic-glibc \
-Iexternal/zig_sdk/lib/libc/include/any-linux-any \
-Iexternal/zig_sdk/lib/libc/include/x86_64-linux-gnu \
-Iexternal/zig_sdk/lib/libc/include/x86_64-linux-any \
-Iexternal/zig_sdk/lib/libc/include/x86-linux-any \
-Iexternal/zig_sdk/glibc-hacks \
<...>
So the next place it will find `stdio.h` is in `generic-glibc`, which already
uses the `__WORDSIZE`. If we make the "next" include to be the arch-specific
one instead of the generic-glibc, things start compiling again.
Fix the same fo musl.
---
toolchain/defs.bzl | 24 ++++++++++++++++++++++--
toolchain/private/cc_toolchains.bzl | 9 +++------
toolchain/private/defs.bzl | 29 ++++++++++++++---------------
3 files changed, 39 insertions(+), 23 deletions(-)
diff --git a/toolchain/defs.bzl b/toolchain/defs.bzl
index f0e6a72..25ca20a 100644
--- a/toolchain/defs.bzl
+++ b/toolchain/defs.bzl
@@ -1,6 +1,13 @@
load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
load("@bazel_tools//tools/build_defs/repo:utils.bzl", "read_user_netrc", "us=
e_netrc")
-load("@bazel-zig-cc//toolchain/private:defs.bzl", "DEFAULT_INCLUDE_DIRECTORI=
ES", "target_structs", "zig_tool_path")
+load("@bazel-zig-cc//toolchain/private:defs.bzl", "target_structs", "zig_too=
l_path")
+
+# Directories that `zig c++` includes behind the scenes.
+_DEFAULT_INCLUDE_DIRECTORIES =3D [
+ "libcxx/include",
+ "libcxxabi/include",
+ "libunwind/include",
+]
=20
_fcntl_map =3D """
GLIBC_2.2.5 {
@@ -86,12 +93,14 @@ _ZIG_TOOLS =3D [
"wasm-ld", # WebAssembly
]
=20
+# TODO: ZIG_LIB_DIR equivalent in powershell?
_ZIG_TOOL_WRAPPER_WINDOWS_CACHE_KNOWN =3D """@echo off
set ZIG_LOCAL_CACHE_DIR=3D{cache_prefix}\\bazel-zig-cc
set ZIG_GLOBAL_CACHE_DIR=3D%ZIG_LOCAL_CACHE_DIR%
"{zig}" "{zig_tool}" %*
"""
=20
+# TODO: ZIG_LIB_DIR equivalent in powershell?
_ZIG_TOOL_WRAPPER_WINDOWS_CACHE_GUESS =3D """@echo off
if exist "%TMP%\\*" goto :usertmp
set ZIG_LOCAL_CACHE_DIR=3DC:\\Temp\\bazel-zig-cc
@@ -104,6 +113,12 @@ set ZIG_GLOBAL_CACHE_DIR=3D%ZIG_LOCAL_CACHE_DIR%
"""
=20
_ZIG_TOOL_WRAPPER_CACHE_KNOWN =3D """#!/bin/sh
+set -e
+if [ -d external/zig_sdk/lib ]; then
+ export ZIG_LIB_DIR=3Dexternal/zig_sdk/lib
+else
+ export ZIG_LIB_DIR=3D"$(dirname "$0")/../lib"
+fi
export ZIG_LOCAL_CACHE_DIR=3D"{cache_prefix}/bazel-zig-cc"
export ZIG_GLOBAL_CACHE_DIR=3D"{cache_prefix}/bazel-zig-cc"
exec "{zig}" "{zig_tool}" "$@"
@@ -111,6 +126,11 @@ exec "{zig}" "{zig_tool}" "$@"
=20
_ZIG_TOOL_WRAPPER_CACHE_GUESS =3D """#!/bin/sh
set -e
+if [ -d external/zig_sdk/lib ]; then
+ export ZIG_LIB_DIR=3Dexternal/zig_sdk/lib
+else
+ export ZIG_LIB_DIR=3D"$(dirname "$0")/../lib"
+fi
if [ -n "$TMPDIR" ]; then
_cache_prefix=3D$TMPDIR
elif [ -n "$HOME" ]; then
@@ -258,7 +278,7 @@ def declare_files(os, zig_include_root):
lazy_filegroups =3D {}
=20
for target_config in target_structs():
- for d in DEFAULT_INCLUDE_DIRECTORIES + target_config.includes:
+ for d in _DEFAULT_INCLUDE_DIRECTORIES + target_config.includes:
d =3D zig_include_root + d
if d not in lazy_filegroups:
lazy_filegroups[d] =3D filegroup(name =3D d, srcs =3D native=
.glob([d + "/**"]))
diff --git a/toolchain/private/cc_toolchains.bzl b/toolchain/private/cc_toolc=
hains.bzl
index 6b8b3e6..a5b4b5e 100644
--- a/toolchain/private/cc_toolchains.bzl
+++ b/toolchain/private/cc_toolchains.bzl
@@ -1,4 +1,4 @@
-load(":defs.bzl", "DEFAULT_INCLUDE_DIRECTORIES", "target_structs", "zig_tool=
_path")
+load(":defs.bzl", "target_structs", "zig_tool_path")
load("@bazel-zig-cc//toolchain:zig_toolchain.bzl", "zig_cc_toolchain_config")
=20
DEFAULT_TOOL_PATHS =3D {
@@ -17,9 +17,6 @@ def declare_cc_toolchains(os, absolute_path, zig_include_ro=
ot):
zigtarget =3D target_config.zigtarget
=20
cxx_builtin_include_directories =3D []
- for d in DEFAULT_INCLUDE_DIRECTORIES + target_config.includes:
- d =3D zig_include_root + d
- cxx_builtin_include_directories.append(absolute_path + "/" + d)
for d in getattr(target_config, "toplevel_include", []):
cxx_builtin_include_directories.append(absolute_path + "/" + d)
=20
@@ -53,7 +50,7 @@ def declare_cc_toolchains(os, absolute_path, zig_include_ro=
ot):
compiler =3D "clang",
abi_version =3D "unknown",
abi_libc_version =3D "unknown",
- # visibility =3D ["//visibility:private"],
+ visibility =3D ["//visibility:private"],
)
=20
native.cc_toolchain(
@@ -68,5 +65,5 @@ def declare_cc_toolchains(os, absolute_path, zig_include_ro=
ot):
objcopy_files =3D "@zig_sdk//:empty",
strip_files =3D "@zig_sdk//:empty",
supports_param_files =3D 0,
- # visibility =3D ["//visibility:private"],
+ visibility =3D ["//visibility:private"],
)
diff --git a/toolchain/private/defs.bzl b/toolchain/private/defs.bzl
index 8a8b4f5..2e939fd 100644
--- a/toolchain/private/defs.bzl
+++ b/toolchain/private/defs.bzl
@@ -1,9 +1,3 @@
-DEFAULT_INCLUDE_DIRECTORIES =3D [
- "include",
- "libcxx/include",
- "libcxxabi/include",
-]
-
_ZIG_TOOL_PATH =3D "tools/{zig_tool}"
=20
# Zig supports even older glibcs than defined below, but we have tested only
@@ -101,12 +95,14 @@ def _target_linux_gnu(gocpu, zigcpu, glibc_version):
gotarget =3D "linux_{}_{}".format(gocpu, glibc_suffix),
zigtarget =3D "{}-linux-{}".format(zigcpu, glibc_suffix),
includes =3D [
- "libunwind/include",
- "libc/include/generic-glibc",
+ "libc/include/{}-linux-gnu".format(zigcpu),
+ "libc/include/generic-glibc",
+ ] +
+ # x86_64-linux-any is x86_64-linux and x86-linux combined.
+ (["libc/include/x86-linux-any"] if zigcpu =3D=3D "x86_64"=
else []) +
+ (["libc/include/{}-linux-any".format(zigcpu)] if zigcpu !=
=3D "x86_64" else []) + [
"libc/include/any-linux-any",
- "libc/include/{}-linux-gnu".format(zigcpu),
- "libc/include/{}-linux-any".format(zigcpu),
- ] + (["libc/include/x86-linux-any"] if zigcpu =3D=3D "x86_64" else [=
]),
+ ],
toplevel_include =3D ["glibc-hacks"] if fcntl_hack else [],
compiler_extra_includes =3D ["glibc-hacks/glibchack-fcntl.h"] if fcn=
tl_hack else [],
linker_version_scripts =3D ["glibc-hacks/fcntl.map"] if fcntl_hack e=
lse [],
@@ -127,11 +123,14 @@ def _target_linux_musl(gocpu, zigcpu):
gotarget =3D "linux_{}_musl".format(gocpu),
zigtarget =3D "{}-linux-musl".format(zigcpu),
includes =3D [
- "libc/include/generic-musl",
+ "libc/include/{}-linux-musl".format(zigcpu),
+ "libc/include/generic-musl",
+ ] +
+ # x86_64-linux-any is x86_64-linux and x86-linux combined.
+ (["libc/include/x86-linux-any"] if zigcpu =3D=3D "x86_64"=
else []) +
+ (["libc/include/{}-linux-any".format(zigcpu)] if zigcpu !=
=3D "x86_64" else []) + [
"libc/include/any-linux-any",
- "libc/include/{}-linux-musl".format(zigcpu),
- "libc/include/{}-linux-any".format(zigcpu),
- ] + (["libc/include/x86-linux-any"] if zigcpu =3D=3D "x86_64" else [=
]),
+ ],
linkopts =3D [],
dynamic_library_linkopts =3D [],
copts =3D ["-D_LIBCPP_HAS_MUSL_LIBC", "-D_LIBCPP_HAS_THREAD_API_PTHR=
EAD"],
--=20
2.34.4
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Subject: [bazel-zig-cc/patches/.build.yml] build success
To: "~motiejus" <motiejus@jakstys.lt>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht
From: "builds.sr.ht" <builds@sr.ht>
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bazel-zig-cc/patches/.build.yml: SUCCESS in 47m37s
[use relative paths][0] from [~motiejus][1]
[0]: https://lists.sr.ht/~motiejus/bazel-zig-cc/patches/35627
[1]: mailto:motiejus@jakstys.lt
=E2=9C=93 #851368 SUCCESS bazel-zig-cc/patches/.build.yml https://builds.sr=
.ht/~motiejus/job/851368
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From: Laurynas Lubys <laurynasl@uber.com>
Date: Tue, 27 Sep 2022 12:44:34 +0300
Message-ID: <CAG09j48HjG7DQ9a7pxgniwNS6Yik7ZEVVo52XsmpfVLtmzoB-A@mail.gmail.com>
Subject: Re: [PATCH bazel-zig-cc 0/2] use relative paths
To: "~motiejus" <motiejus@jakstys.lt>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht, fabian@hahn.graphics,
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Mostly looks good.
The `absolute_path` parameter can be inlined to avoid confusion.
I don't see a good way to keep the `private` package. It has to go, so
that all the generated files are available under the `zig_sdk//:all`
fileset.
On Tue, Sep 27, 2022 at 10:24 AM ~motiejus <motiejus@git.sr.ht> wrote:
>
> This patchset changes absolute paths to tools to relative paths. Work
> was started by @kmicklas and completed by myself and @laurynasl. Please
> review.
>
> Currently, with absolute paths, bazel's remote cache keys are different
> between two workspaces, busting our remote cache. We hope (did not try
> yet) that this will normalize them and fix our cache hit ratios.
>
> Fabian, this does not work on Windows yet; if you want to chime in, I
> will wait a couple of days for your patch before I cut a release.
>
> 1.0 is coming soon.
>
> Ken Micklas (1):
> WIP: use relative paths for tools
>
> Motiejus Jak=C5=A1tys (1):
> defs: fix import paths
>
> README.md | 2 +-
> toolchain/BUILD.sdk.bazel | 9 +++++++--
> toolchain/defs.bzl | 29 +++++++++++++++++++++++++----
> toolchain/private/BUILD.sdk.bazel | 7 -------
> toolchain/private/cc_toolchains.bzl | 17 ++++++++---------
> toolchain/private/defs.bzl | 29 ++++++++++++++---------------
> toolchain/toolchain/defs.bzl | 4 ++--
> 7 files changed, 57 insertions(+), 40 deletions(-)
> delete mode 100644 toolchain/private/BUILD.sdk.bazel
>
> --
> 2.34.4
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From: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Date: Tue, 27 Sep 2022 16:09:52 +0300
Message-ID: <CAFVMu-rJk0fyAMpvWRN60r38bELu5Oq1orM6-8aARKY0zyOvBQ@mail.gmail.com>
Subject: bazel-zig-cc v1.0.0-rc1
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Hi all,
I just cut bazel-zig-cc v1.0.0-rc1. Big release:
- use relative paths for tools. We hope this will make builds (more)
reproducible and un-bust our remote cache hit rates.
- you may have noticed zig_sdk is being "downloaded" ~10 times on some
occasions. No longer.
We are in final testing & acceptance phase to use bazel-zig-cc for all
CGo at Uber's Go Monorepo. We may have a couple more RCs.
Note: this release temporarily breaks Windows support; I will wait for
a couple of days for Fabian's patch to port [1] before cutting v1.0.0.
This release includes code from Motiejus Jak=C5=A1tys and Ken Micklas with
close collaboration of Laurynas Lubys.
[1]: https://lists.sr.ht/~motiejus/bazel-zig-cc/patches/35627
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From: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Date: Tue, 27 Sep 2022 16:59:43 +0300
Message-ID: <CAFVMu-oQC8e=7cJJLvdM5q8WtnDEChogsX3coJPvUoi7d3pbCg@mail.gmail.com>
Subject: Re: bazel-zig-cc v1.0.0-rc1
To: ~motiejus/bazel-zig-cc@lists.sr.ht
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On Tue, Sep 27, 2022 at 4:09 PM Motiejus Jak=C5=A1tys <motiejus@jakstys.lt>=
wrote:
> - use relative paths for tools. We hope this will make builds (more)
> reproducible and un-bust our remote cache hit rates.
Quick update: bazel-zig-cc v1.0.0-rc1 does not mess up the remote
cache keys. Jackpot!
Motiejus
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To: ~motiejus/bazel-zig-cc@lists.sr.ht
Cc: Fabian Hahn <fabian@hahn.graphics>
Subject: [PATCH bazel-zig-cc] fix Windows host support with relative paths
Date: Wed, 28 Sep 2022 17:38:11 +0100
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v1.0.0-rc1 indeed broke Windows host support, but it was trivial to fix.
Also, the massive speedups gained from bazel not redownloading zig
multiple times more than made up for it, this was actually way worse on
Windows than I've ever experienced it to be on Linux (could take up to
10 minutes on first bazel run...). Also very cool to see that we're now
friendly to remote caches. Fantastic work everyone!
I've tested v1.0.0-rc1 with my minimal patch below on Windows and
everything is working fine. If we can add this then from my side v1.0.0
is good to go. Nice milestone indeed.
Best,
Fabian
---
toolchain/defs.bzl | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/toolchain/defs.bzl b/toolchain/defs.bzl
index 0aba0fb..487271f 100644
--- a/toolchain/defs.bzl
+++ b/toolchain/defs.bzl
@@ -93,15 +93,15 @@ _ZIG_TOOLS = [
"wasm-ld", # WebAssembly
]
-# TODO: ZIG_LIB_DIR equivalent in powershell?
_ZIG_TOOL_WRAPPER_WINDOWS_CACHE_KNOWN = """@echo off
+set ZIG_LIB_DIR=external\\zig_sdk\\lib
set ZIG_LOCAL_CACHE_DIR={cache_prefix}\\bazel-zig-cc
set ZIG_GLOBAL_CACHE_DIR=%ZIG_LOCAL_CACHE_DIR%
"{zig}" "{zig_tool}" %*
"""
-# TODO: ZIG_LIB_DIR equivalent in powershell?
_ZIG_TOOL_WRAPPER_WINDOWS_CACHE_GUESS = """@echo off
+set ZIG_LIB_DIR=external\\zig_sdk\\lib
if exist "%TMP%\\*" goto :usertmp
set ZIG_LOCAL_CACHE_DIR=C:\\Temp\\bazel-zig-cc
goto zig
--
2.25.1
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Subject: [bazel-zig-cc/patches/.build.yml] build success
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bazel-zig-cc/patches/.build.yml: SUCCESS in 48m21s
[fix Windows host support with relative paths][0] from [Fabian Hahn][1]
[0]: https://lists.sr.ht/~motiejus/bazel-zig-cc/patches/35663
[1]: mailto:fabian@hahn.graphics
=E2=9C=93 #852370 SUCCESS bazel-zig-cc/patches/.build.yml https://builds.sr=
.ht/~motiejus/job/852370
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From: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Date: Wed, 28 Sep 2022 20:38:53 +0300
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Subject: Re: [PATCH bazel-zig-cc] fix Windows host support with relative paths
To: Fabian Hahn <fabian@hahn.graphics>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht
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Hi Fabian,
On Wed, Sep 28, 2022 at 7:38 PM Fabian Hahn <fabian@hahn.graphics> wrote:
> diff --git a/toolchain/defs.bzl b/toolchain/defs.bzl
> index 0aba0fb..487271f 100644
> --- a/toolchain/defs.bzl
> +++ b/toolchain/defs.bzl
> @@ -93,15 +93,15 @@ _ZIG_TOOLS = [
> "wasm-ld", # WebAssembly
> ]
>
> -# TODO: ZIG_LIB_DIR equivalent in powershell?
> _ZIG_TOOL_WRAPPER_WINDOWS_CACHE_KNOWN = """@echo off
> +set ZIG_LIB_DIR=external\\zig_sdk\\lib
> set ZIG_LOCAL_CACHE_DIR={cache_prefix}\\bazel-zig-cc
> set ZIG_GLOBAL_CACHE_DIR=%ZIG_LOCAL_CACHE_DIR%
> "{zig}" "{zig_tool}" %*
See the logic of Linux:
if [ -d external/zig_sdk/lib ]; then
export ZIG_LIB_DIR=external/zig_sdk/lib
else
export ZIG_LIB_DIR="$(dirname "$0")/../lib"
fi
It should set ZIG_LIB_DIR to external/zig_sdk/lib iff the directory
exists. It may not exist if build tools change working directory
before invoking zig cc. Hello Go!
Can you update the patch to add this?
Motiejus
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To: ~motiejus/bazel-zig-cc@lists.sr.ht
Cc: Fabian Hahn <fabian@hahn.graphics>
Subject: [PATCH bazel-zig-cc v2] fix Windows host support with relative paths
Date: Wed, 28 Sep 2022 19:58:17 +0100
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---
Fixed the Windows scripts to support changing working directories.
Apologies for missing this, it didn't come up in my testing so I wasn't
sure if would be needed and skipped it. It's a bit more complicated now
than just adding a single line, but should still be fine.
Best,
Fabian
toolchain/defs.bzl | 14 ++++++++++++--
1 file changed, 12 insertions(+), 2 deletions(-)
diff --git a/toolchain/defs.bzl b/toolchain/defs.bzl
index 0aba0fb..284d2fe 100644
--- a/toolchain/defs.bzl
+++ b/toolchain/defs.bzl
@@ -93,15 +93,25 @@ _ZIG_TOOLS = [
"wasm-ld", # WebAssembly
]
-# TODO: ZIG_LIB_DIR equivalent in powershell?
_ZIG_TOOL_WRAPPER_WINDOWS_CACHE_KNOWN = """@echo off
+if exist "external\\zig_sdk\\lib\\*" goto :have_external_zig_sdk_lib
+set ZIG_LIB_DIR=%~dp0\\..\\lib
+goto :set_zig_lib_dir
+:have_external_zig_sdk_lib
+set ZIG_LIB_DIR=external\\zig_sdk\\lib
+:set_zig_lib_dir
set ZIG_LOCAL_CACHE_DIR={cache_prefix}\\bazel-zig-cc
set ZIG_GLOBAL_CACHE_DIR=%ZIG_LOCAL_CACHE_DIR%
"{zig}" "{zig_tool}" %*
"""
-# TODO: ZIG_LIB_DIR equivalent in powershell?
_ZIG_TOOL_WRAPPER_WINDOWS_CACHE_GUESS = """@echo off
+if exist "external\\zig_sdk\\lib\\*" goto :have_external_zig_sdk_lib
+set ZIG_LIB_DIR=%~dp0\\..\\lib
+goto :set_zig_lib_dir
+:have_external_zig_sdk_lib
+set ZIG_LIB_DIR=external\\zig_sdk\\lib
+:set_zig_lib_dir
if exist "%TMP%\\*" goto :usertmp
set ZIG_LOCAL_CACHE_DIR=C:\\Temp\\bazel-zig-cc
goto zig
--
2.25.1
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Subject: [bazel-zig-cc/patches/.build.yml] build success
To: "Fabian Hahn" <fabian@hahn.graphics>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht
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bazel-zig-cc/patches/.build.yml: SUCCESS in 47m9s
[fix Windows host support with relative paths][0] v2 from [Fabian Hahn][1]
[0]: https://lists.sr.ht/~motiejus/bazel-zig-cc/patches/35674
[1]: mailto:fabian@hahn.graphics
=E2=9C=93 #852447 SUCCESS bazel-zig-cc/patches/.build.yml https://builds.sr=
.ht/~motiejus/job/852447
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From: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Date: Thu, 29 Sep 2022 11:33:28 +0300
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Subject: Re: [PATCH bazel-zig-cc v2] fix Windows host support with relative paths
To: Fabian Hahn <fabian@hahn.graphics>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht
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On Wed, Sep 28, 2022 at 9:58 PM Fabian Hahn <fabian@hahn.graphics> wrote:
>
> ---
> Fixed the Windows scripts to support changing working directories.
> Apologies for missing this, it didn't come up in my testing so I wasn't
> sure if would be needed and skipped it. It's a bit more complicated now
> than just adding a single line, but should still be fine.
>
> Best,
> Fabian
>
Thanks! Applied and tagged v1.0.0-rc2.
Motiejus
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From: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Date: Tue, 25 Oct 2022 09:59:29 +0300
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Subject: what's cooking in bazel-zig-cc
To: ~motiejus/bazel-zig-cc@lists.sr.ht
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Hi folks,
I made a few -rc releases and things went silent. Well, they are
silent publicly, but I am very much working on v1.0.
A few open tracks:
- bazel-zig-cc is much slower than gcc/clang when building many small
binaries. https://git.sr.ht/~motiejus/test-zigcc reproduces it whlist
comparing to grailbio/bazel-toolchain.
- relative ZIG_LIB_DIR does not work correctly in zig, tracked in
https://github.com/ziglang/zig/issues/13050 ; currently bazel-zig-cc
ships a forked version which includes #13051 (created using
https://git.sr.ht/~motiejus/bazel-zig-cc/tree/main/item/contrib/README-patched.md
).
- rare race in zig when building glibc stubs:
https://github.com/ziglang/zig/issues/13160
I am currently narrowing down (1), so I can remove Bazel out of the
picture and engage ZSF. The other two have been escalated to ZSF under
Uber's support contract and we are awaiting resolution.
Hold tight!
Motiejus
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From: Gregg Reynolds <dev@mobileink.com>
Date: Thu, 3 Nov 2022 09:40:36 -0500
Message-ID: <CAO40MinKZyYCg3xBgJR0_70zrBxctm81pbYtwyg=UJ9fYTFdmw@mail.gmail.com>
Subject: v1.0.0-rc1 fail on mac: stddef.h not found
To: ~motiejus/bazel-zig-cc@lists.sr.ht
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First off: bazel-zig-cc is awesome, thanks so much!
Second: I tried to send this via the mailing list 'new post' button
and from gmail but both were rejected because they contain html.
Recommend you find a friendlier mailing list manager.
In any case here's the error:
runtime/caml/config.h:51:10: fatal error: 'stddef.h' file not found
#include <stddef.h>
^~~~~~~~~~
Selected tc:
INFO: ToolchainResolution: Target platform
@local_config_platform//:host: Selected execution platform
@local_config_platform//:host, type
@bazel_tools//tools/cpp:toolchain_type -> toolchain
@zig_sdk//:x86_64-macos-none_cc
Compile cmd:
external/zig_sdk/tools/c++ -MD -MF
bazel-out/host/bin/runtime/_objs/sak.exe/sak.d
'-frandom-seed=bazel-out/host/bin/runtime/_objs/sak.exe/sak.o'
'-DCAMLDLLIMPORT=' -DIN_CAML_RUNTIME -iquote . -iquote
bazel-out/host/bin -iquote external/bazel_tools -iquote
bazel-out/host/bin/external/bazel_tools
-Ibazel-out/host/bin/runtime/caml/_virtual_includes/hdrs -target
x86_64-macos-none -no-canonical-prefixes -Wno-builtin-macro-redefined
'-D__DATE__="redacted"' '-D__TIMESTAMP__="redacted"'
'-D__TIME__="redacted"' -O2 -DNDEBUG -g0 -fno-strict-aliasing -fwrapv
-pthread -Wall -Werror -fno-common -c runtime/sak.c -o
bazel-out/host/bin/runtime/_objs/sak.exe/sak.o)
System:
$ sw_vers
ProductName: macOS
ProductVersion: 12.6
BuildVersion: 21G115
$ xcodebuild -version
Xcode 14.1
Build version 14B47b
Thanks,
Gregg
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Date: Fri, 4 Nov 2022 21:22:44 +0200
From: Motiejus =?utf-8?Q?Jak=C5=A1tys?= <motiejus@jakstys.lt>
To: Gregg Reynolds <dev@mobileink.com>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht
Subject: Re: v1.0.0-rc1 fail on mac: stddef.h not found
Message-ID: <20221104192244.r53ifvwhbnyuughu@mtmine.i.jakstys.lt>
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On Thu, Nov 03, 2022 at 09:40:36AM -0500, Gregg Reynolds wrote:
> First off: bazel-zig-cc is awesome, thanks so much!
Hi, thanks!
> Second: I tried to send this via the mailing list 'new post' button
> and from gmail but both were rejected because they contain html.
> Recommend you find a friendlier mailing list manager.
bazel-zig-cc is planned to move to github.com/uber ; timelines are
unknown yet though. Will update this list when I have more details.
> In any case here's the error:
>
> runtime/caml/config.h:51:10: fatal error: 'stddef.h' file not found
> #include <stddef.h>
> ^~~~~~~~~~
Please use v0.9.2, the one that's recommended in the README. 1.0.0-rc
versions are known to have bugs. See my earlier posts in this mailing
list.
I will ping here separately when I will need extra hands testing v1.0.
It's not ready yet.
Motiejus
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<20221104192244.r53ifvwhbnyuughu@mtmine.i.jakstys.lt>
In-Reply-To: <20221104192244.r53ifvwhbnyuughu@mtmine.i.jakstys.lt>
From: Gregg Reynolds <dev@mobileink.com>
Date: Fri, 4 Nov 2022 16:10:40 -0500
Message-ID: <CAO40Mi=rKx0W6Xk1gwvaoi=EuNtc8cwPpjcFdAWvxXv7WVZ0_g@mail.gmail.com>
Subject: Re: v1.0.0-rc1 fail on mac: stddef.h not found
To: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht
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Ok, thanks for the update.
On Fri, Nov 4, 2022 at 2:22 PM Motiejus Jak=C5=A1tys <motiejus@jakstys.lt> =
wrote:
>
> On Thu, Nov 03, 2022 at 09:40:36AM -0500, Gregg Reynolds wrote:
> > First off: bazel-zig-cc is awesome, thanks so much!
>
> Hi, thanks!
>
> > Second: I tried to send this via the mailing list 'new post' button
> > and from gmail but both were rejected because they contain html.
> > Recommend you find a friendlier mailing list manager.
>
> bazel-zig-cc is planned to move to github.com/uber ; timelines are
> unknown yet though. Will update this list when I have more details.
>
> > In any case here's the error:
> >
> > runtime/caml/config.h:51:10: fatal error: 'stddef.h' file not found
> > #include <stddef.h>
> > ^~~~~~~~~~
>
> Please use v0.9.2, the one that's recommended in the README. 1.0.0-rc
> versions are known to have bugs. See my earlier posts in this mailing
> list.
>
> I will ping here separately when I will need extra hands testing v1.0.
> It's not ready yet.
>
> Motiejus
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From: ~motiejus <motiejus@git.sr.ht>
Date: Sun, 11 Dec 2022 04:56:01 +0000
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Subject: [PATCH bazel-zig-cc 0/1] changes in windows zig toolchain wrapper
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I am doing a change in Windows wrapper, which I have no means to test
nor know is correct. Fabian, please test/ack.
`--experimental_use_hermetic_linux_sandbox` option is interesting,
because instead of symlinks in the sandbox it creates hardlinks. Which
has a chance to fix https://github.com/ziglang/zig/issues/13619 ;
Bazel's acceptance test in https://git.sr.ht/~motiejus/test-zigcc.
Hermetic sandbox also means one thing: all outside-sandbox directories
need to be explicitly allowlisted with `sandbox_mount_pair`. Since the
toolchain wrapper uses /bin/sh, it brings a bunch of stuff with it:
/bin, /lib, /lib64. If my experiments with
`experimental_use_hermetic_linux_sandbox` will fix the performance
issue, the zig wrapper rewrite to zig will happen sooner than later (and
I may have an interesting bootstrap problem to solve).
Motiejus Jak=C5=A1tys (1):
toolchain wrapper: zig_exe path is relative
toolchain/defs.bzl | 20 +++++++++++++-------
1 file changed, 13 insertions(+), 7 deletions(-)
--=20
2.34.5
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From: ~motiejus <motiejus@git.sr.ht>
Date: Sun, 11 Dec 2022 06:43:28 +0200
Subject: [PATCH bazel-zig-cc 1/1] toolchain wrapper: zig_exe path is relative
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From: Motiejus Jak=C5=A1tys <motiejus@uber.com>
Just like we know the path to zig_lib_dir, we do know the path to
zig_exe. Lets use that.
This was surfaced by experimenting with
`--experimental_use_hermetic_linux_sandbox`.
`repository_ctx.path("zig")` would return the real file system path to
zig (outside of the sandbox), which is not good when the sandbox is
hermetic.
---
toolchain/defs.bzl | 20 +++++++++++++-------
1 file changed, 13 insertions(+), 7 deletions(-)
diff --git a/toolchain/defs.bzl b/toolchain/defs.bzl
index 3d08abd..752a663 100644
--- a/toolchain/defs.bzl
+++ b/toolchain/defs.bzl
@@ -92,21 +92,25 @@ _ZIG_TOOLS =3D [
_ZIG_TOOL_WRAPPER_WINDOWS_CACHE_KNOWN =3D """@echo off
if exist "external\\zig_sdk\\lib\\*" goto :have_external_zig_sdk_lib
set ZIG_LIB_DIR=3D%~dp0\\..\\..\\lib
+set ZIG_EXE=3D%~dp0\\..\\..\\zig
goto :set_zig_lib_dir
:have_external_zig_sdk_lib
set ZIG_LIB_DIR=3Dexternal\\zig_sdk\\lib
+set ZIG_EXE=3Dexternal\\zig_sdk\\zig
:set_zig_lib_dir
set ZIG_LOCAL_CACHE_DIR=3D{cache_prefix}\\bazel-zig-cc
set ZIG_GLOBAL_CACHE_DIR=3D%ZIG_LOCAL_CACHE_DIR%
-"{zig}" "{zig_tool}" {maybe_target} %*
+"$ZIG_EXE" "{zig_tool}" {maybe_target} %*
"""
=20
_ZIG_TOOL_WRAPPER_WINDOWS_CACHE_GUESS =3D """@echo off
if exist "external\\zig_sdk\\lib\\*" goto :have_external_zig_sdk_lib
set ZIG_LIB_DIR=3D%~dp0\\..\\..\\lib
+set ZIG_EXE=3D%~dp0\\..\\..\\zig
goto :set_zig_lib_dir
:have_external_zig_sdk_lib
set ZIG_LIB_DIR=3Dexternal\\zig_sdk\\lib
+set ZIG_EXE=3Dexternal\\zig_sdk\\zig
:set_zig_lib_dir
if exist "%TMP%\\*" goto :usertmp
set ZIG_LOCAL_CACHE_DIR=3DC:\\Temp\\bazel-zig-cc
@@ -115,29 +119,33 @@ goto zig
set ZIG_LOCAL_CACHE_DIR=3D%TMP%\\bazel-zig-cc
:zig
set ZIG_GLOBAL_CACHE_DIR=3D%ZIG_LOCAL_CACHE_DIR%
-"{zig}" "{zig_tool}" {maybe_target} %*
+"$ZIG_EXE" "{zig_tool}" {maybe_target} %*
"""
=20
_ZIG_TOOL_WRAPPER_CACHE_KNOWN =3D """#!/bin/sh
set -e
if [ -d external/zig_sdk/lib ]; then
ZIG_LIB_DIR=3Dexternal/zig_sdk/lib
+ ZIG_EXE=3Dexternal/zig_sdk/zig
else
ZIG_LIB_DIR=3D"$(dirname "$0")/../../lib"
+ ZIG_EXE=3D"$(dirname "$0")/../../zig"
fi
export ZIG_LIB_DIR
export ZIG_LOCAL_CACHE_DIR=3D"{cache_prefix}/bazel-zig-cc"
export ZIG_GLOBAL_CACHE_DIR=3D"{cache_prefix}/bazel-zig-cc"
{maybe_gohack}
-exec "{zig}" "{zig_tool}" {maybe_target} "$@"
+exec "$ZIG_EXE" "{zig_tool}" {maybe_target} "$@"
"""
=20
_ZIG_TOOL_WRAPPER_CACHE_GUESS =3D """#!/bin/sh
set -e
if [ -d external/zig_sdk/lib ]; then
ZIG_LIB_DIR=3Dexternal/zig_sdk/lib
+ ZIG_EXE=3Dexternal/zig_sdk/zig
else
ZIG_LIB_DIR=3D"$(dirname "$0")/../../lib"
+ ZIG_EXE=3D"$(dirname "$0")/../../zig"
fi
if [ -n "$TMPDIR" ]; then
_cache_prefix=3D$TMPDIR
@@ -154,7 +162,7 @@ export ZIG_LIB_DIR
export ZIG_LOCAL_CACHE_DIR=3D"$_cache_prefix/bazel-zig-cc"
export ZIG_GLOBAL_CACHE_DIR=3D$ZIG_LOCAL_CACHE_DIR
{maybe_gohack}
-exec "{zig}" "{zig_tool}" {maybe_target} "$@"
+exec "$ZIG_EXE" "{zig_tool}" {maybe_target} "$@"
"""
=20
# The abomination below adds "-O2" to Go's link-prober command. Saves around
@@ -176,14 +184,13 @@ fi
eval set -- "$saved"
"""
=20
-def _zig_tool_wrapper(zig_tool, zig, is_windows, cache_prefix, zigtarget):
+def _zig_tool_wrapper(zig_tool, is_windows, cache_prefix, zigtarget):
if zig_tool in ["c++", "build-exe", "build-lib", "build-obj"]:
maybe_target =3D "-target {}".format(zigtarget)
else:
maybe_target =3D ""
=20
kwargs =3D dict(
- zig =3D str(zig).replace("/", "\\") + ".exe" if is_windows else zig,
zig_tool =3D zig_tool,
cache_prefix =3D cache_prefix,
maybe_gohack =3D _ZIG_TOOL_GOHACK if (zig_tool =3D=3D "c++" and not =
is_windows) else "",
@@ -266,7 +273,6 @@ def _zig_repository_impl(repository_ctx):
for target_config in target_structs():
zig_tool_wrapper =3D _zig_tool_wrapper(
zig_tool,
- str(repository_ctx.path("zig")),
os =3D=3D "windows",
repository_ctx.os.environ.get("BAZEL_ZIG_CC_CACHE_PREFIX", "=
"),
zigtarget =3D target_config.zigtarget,
--=20
2.34.5
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bazel-zig-cc/patches/.build.yml: FAILED in 18m9s
[changes in windows zig toolchain wrapper][0] from [~motiejus][1]
[0]: https://lists.sr.ht/~motiejus/bazel-zig-cc/patches/37457
[1]: mailto:motiejus@jakstys.lt
=E2=9C=97 #902752 FAILED bazel-zig-cc/patches/.build.yml https://builds.sr.=
ht/~motiejus/job/902752
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for <~motiejus/bazel-zig-cc@lists.sr.ht>; Sun, 11 Dec 2022 14:53:50 +0000 (UTC)
From: Fabian Hahn <fabian@hahn.graphics>
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To: ~motiejus/bazel-zig-cc@lists.sr.ht
Cc: Fabian Hahn <fabian@hahn.graphics>
Subject: [PATCH bazel-zig-cc] fix windows include root path
Date: Sun, 11 Dec 2022 14:53:37 +0000
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---
When trying to test the patch
https://lists.sr.ht/~motiejus/bazel-zig-cc/patches/37457 I noticed that
the current main branch is broken on Windows. I ran a bisection and the
offending bad commit is 88e7e47ed20ca7b2f9509dfe09089b812d7d94eb, which
makes changes to the zig_include_root. Here's a small patch that
resolves this and fixes Windows host support again on main. The issue
here is that while paths on Windows do indeed use \ instead of /, the
variable `d` here is used as a bazel target name for a filegroup rule,
which must not contain backslashes. And bazel accepts forward slashes
within glob() just fine on Windows, so no special handling needed here.
toolchain/defs.bzl | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/toolchain/defs.bzl b/toolchain/defs.bzl
index 3d08abd..aa2e4e6 100644
--- a/toolchain/defs.bzl
+++ b/toolchain/defs.bzl
@@ -318,6 +318,6 @@ def declare_files(os):
for target_config in target_structs():
for d in _DEFAULT_INCLUDE_DIRECTORIES + target_config.includes:
- d = "lib" + ("\\" if os == "windows" else "/") + d
+ d = "lib/" + d
if d not in lazy_filegroups:
lazy_filegroups[d] = filegroup(name = d, srcs = native.glob([d + "/**"]))
--
2.25.1
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To: ~motiejus/bazel-zig-cc@lists.sr.ht
Cc: Fabian Hahn <fabian@hahn.graphics>
Subject: [PATCH bazel-zig-cc v2 0/1] changes in windows zig toolchain wrapper
Date: Sun, 11 Dec 2022 14:59:28 +0000
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This is a revised version of
https://lists.sr.ht/~motiejus/bazel-zig-cc/patches/37457 which fixes
Windows host support. The key is to use %VAR% notation to interpolate
environment variables within batch file strings, and to use the proper
exe extension for the zig binary.
Note that in order for this to work on Windows, this other patch I
submitted also needs to be applied:
https://lists.sr.ht/~motiejus/bazel-zig-cc/patches/37465
This is because the current main is broken on Windows otherwise.
Best,
Fabian
Motiejus Jakštys (1):
toolchain wrapper: zig_exe path is relative
toolchain/defs.bzl | 20 +++++++++++++-------
1 file changed, 13 insertions(+), 7 deletions(-)
--
2.25.1
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Subject: [PATCH bazel-zig-cc v2 1/1] toolchain wrapper: zig_exe path is relative
Date: Sun, 11 Dec 2022 14:59:29 +0000
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From: Motiejus Jakštys <motiejus@uber.com>
Just like we know the path to zig_lib_dir, we do know the path to
zig_exe. Lets use that.
This was surfaced by experimenting with
`--experimental_use_hermetic_linux_sandbox`.
`repository_ctx.path("zig")` would return the real file system path to
zig (outside of the sandbox), which is not good when the sandbox is
hermetic.
---
toolchain/defs.bzl | 20 +++++++++++++-------
1 file changed, 13 insertions(+), 7 deletions(-)
diff --git a/toolchain/defs.bzl b/toolchain/defs.bzl
index aa2e4e6..746156d 100644
--- a/toolchain/defs.bzl
+++ b/toolchain/defs.bzl
@@ -92,21 +92,25 @@ _ZIG_TOOLS = [
_ZIG_TOOL_WRAPPER_WINDOWS_CACHE_KNOWN = """@echo off
if exist "external\\zig_sdk\\lib\\*" goto :have_external_zig_sdk_lib
set ZIG_LIB_DIR=%~dp0\\..\\..\\lib
+set ZIG_EXE=%~dp0\\..\\..\\zig.exe
goto :set_zig_lib_dir
:have_external_zig_sdk_lib
set ZIG_LIB_DIR=external\\zig_sdk\\lib
+set ZIG_EXE=external\\zig_sdk\\zig.exe
:set_zig_lib_dir
set ZIG_LOCAL_CACHE_DIR={cache_prefix}\\bazel-zig-cc
set ZIG_GLOBAL_CACHE_DIR=%ZIG_LOCAL_CACHE_DIR%
-"{zig}" "{zig_tool}" {maybe_target} %*
+"%ZIG_EXE%" "{zig_tool}" {maybe_target} %*
"""
_ZIG_TOOL_WRAPPER_WINDOWS_CACHE_GUESS = """@echo off
if exist "external\\zig_sdk\\lib\\*" goto :have_external_zig_sdk_lib
set ZIG_LIB_DIR=%~dp0\\..\\..\\lib
+set ZIG_EXE=%~dp0\\..\\..\\zig.exe
goto :set_zig_lib_dir
:have_external_zig_sdk_lib
set ZIG_LIB_DIR=external\\zig_sdk\\lib
+set ZIG_EXE=external\\zig_sdk\\zig.exe
:set_zig_lib_dir
if exist "%TMP%\\*" goto :usertmp
set ZIG_LOCAL_CACHE_DIR=C:\\Temp\\bazel-zig-cc
@@ -115,29 +119,33 @@ goto zig
set ZIG_LOCAL_CACHE_DIR=%TMP%\\bazel-zig-cc
:zig
set ZIG_GLOBAL_CACHE_DIR=%ZIG_LOCAL_CACHE_DIR%
-"{zig}" "{zig_tool}" {maybe_target} %*
+"%ZIG_EXE%" "{zig_tool}" {maybe_target} %*
"""
_ZIG_TOOL_WRAPPER_CACHE_KNOWN = """#!/bin/sh
set -e
if [ -d external/zig_sdk/lib ]; then
ZIG_LIB_DIR=external/zig_sdk/lib
+ ZIG_EXE=external/zig_sdk/zig
else
ZIG_LIB_DIR="$(dirname "$0")/../../lib"
+ ZIG_EXE="$(dirname "$0")/../../zig"
fi
export ZIG_LIB_DIR
export ZIG_LOCAL_CACHE_DIR="{cache_prefix}/bazel-zig-cc"
export ZIG_GLOBAL_CACHE_DIR="{cache_prefix}/bazel-zig-cc"
{maybe_gohack}
-exec "{zig}" "{zig_tool}" {maybe_target} "$@"
+exec "$ZIG_EXE" "{zig_tool}" {maybe_target} "$@"
"""
_ZIG_TOOL_WRAPPER_CACHE_GUESS = """#!/bin/sh
set -e
if [ -d external/zig_sdk/lib ]; then
ZIG_LIB_DIR=external/zig_sdk/lib
+ ZIG_EXE=external/zig_sdk/zig
else
ZIG_LIB_DIR="$(dirname "$0")/../../lib"
+ ZIG_EXE="$(dirname "$0")/../../zig"
fi
if [ -n "$TMPDIR" ]; then
_cache_prefix=$TMPDIR
@@ -154,7 +162,7 @@ export ZIG_LIB_DIR
export ZIG_LOCAL_CACHE_DIR="$_cache_prefix/bazel-zig-cc"
export ZIG_GLOBAL_CACHE_DIR=$ZIG_LOCAL_CACHE_DIR
{maybe_gohack}
-exec "{zig}" "{zig_tool}" {maybe_target} "$@"
+exec "$ZIG_EXE" "{zig_tool}" {maybe_target} "$@"
"""
# The abomination below adds "-O2" to Go's link-prober command. Saves around
@@ -176,14 +184,13 @@ fi
eval set -- "$saved"
"""
-def _zig_tool_wrapper(zig_tool, zig, is_windows, cache_prefix, zigtarget):
+def _zig_tool_wrapper(zig_tool, is_windows, cache_prefix, zigtarget):
if zig_tool in ["c++", "build-exe", "build-lib", "build-obj"]:
maybe_target = "-target {}".format(zigtarget)
else:
maybe_target = ""
kwargs = dict(
- zig = str(zig).replace("/", "\\") + ".exe" if is_windows else zig,
zig_tool = zig_tool,
cache_prefix = cache_prefix,
maybe_gohack = _ZIG_TOOL_GOHACK if (zig_tool == "c++" and not is_windows) else "",
@@ -266,7 +273,6 @@ def _zig_repository_impl(repository_ctx):
for target_config in target_structs():
zig_tool_wrapper = _zig_tool_wrapper(
zig_tool,
- str(repository_ctx.path("zig")),
os == "windows",
repository_ctx.os.environ.get("BAZEL_ZIG_CC_CACHE_PREFIX", ""),
zigtarget = target_config.zigtarget,
--
2.25.1
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Subject: [bazel-zig-cc/patches/.build.yml] build success
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bazel-zig-cc/patches/.build.yml: SUCCESS in 17m38s
[fix windows include root path][0] from [Fabian Hahn][1]
[0]: https://lists.sr.ht/~motiejus/bazel-zig-cc/patches/37465
[1]: mailto:fabian@hahn.graphics
=E2=9C=93 #902966 SUCCESS bazel-zig-cc/patches/.build.yml https://builds.sr=
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bazel-zig-cc/patches/.build.yml: SUCCESS in 18m48s
[changes in windows zig toolchain wrapper][0] v2 from [Fabian Hahn][1]
[0]: https://lists.sr.ht/~motiejus/bazel-zig-cc/patches/37466
[1]: mailto:fabian@hahn.graphics
=E2=9C=93 #902967 SUCCESS bazel-zig-cc/patches/.build.yml https://builds.sr=
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Date: Sun, 11 Dec 2022 18:31:56 +0200
From: Motiejus =?utf-8?Q?Jak=C5=A1tys?= <motiejus@jakstys.lt>
To: Fabian Hahn <fabian@hahn.graphics>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht
Subject: Re: [PATCH bazel-zig-cc v2 0/1] changes in windows zig toolchain
wrapper
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On Sun, Dec 11, 2022 at 02:59:28PM +0000, Fabian Hahn wrote:
> This is a revised version of
> https://lists.sr.ht/~motiejus/bazel-zig-cc/patches/37457 which fixes
> Windows host support. The key is to use %VAR% notation to interpolate
> environment variables within batch file strings, and to use the proper
> exe extension for the zig binary.
>
> Note that in order for this to work on Windows, this other patch I
> submitted also needs to be applied:
> https://lists.sr.ht/~motiejus/bazel-zig-cc/patches/37465
> This is because the current main is broken on Windows otherwise.
Hi Fabian,
thank you, applied both.
Be assured that I will break Windows again. However, I will definitely
ask for your testing/feedback before I cut v1.0. Thanks for your
continued contributions.
Motiejus
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Date: Wed, 14 Dec 2022 15:19:04 +0200
Message-ID: <CAFVMu-pnKCOoK+KSqjiVvzME+eL6+N+Y83Q45bkY0rkKSc6xeQ@mail.gmail.com>
Subject: bazel-zig-cc v1.0.0-rc4: call for testers
To: ~motiejus/bazel-zig-cc@lists.sr.ht
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Hi all,
I just cut a v1.0.0-rc4 for testing. Comparing to v0.9 series it does
not have new features, but offers substantial performance gains:
* all compiler paths are now relative, making it remote-cache friendly.
* number of files it needs to pull in to the sandbox is much smaller:
2k for a compile step of x86_64-linux-gnu.2.28, and ~3700 for the
linking step. Compared to almost 16k previously.
Please test and report back any regressions. I tested Uber's Go
Monorepo with it, it seems fine. However, we are very x86_64-linux-gnu
centric (both host and target). Please run your tests *especially* if
you have a different environment.
All bazel-zig-cc contributors should have received an email asking for
permission to re-license it to Apache License 2.0. If you contributed
to bazel-zig-cc and did not receive that email, please let me know! I
am still waiting for a few replies. The sooner we change the license,
the sooner bazel-zig-cc can be put under Uber's open-source umbrella.
Motiejus
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Subject: Re: bazel-zig-cc v1.0.0-rc4: call for testers
Content-Language: en-US
From: Fabian Hahn <fabian@hahn.graphics>
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Hi Motiejus,
I've successfully tested v1.0.0-rc4 on both linux_amd64 and
windows_amd64 as both hosts and targets with my project. Performance
looks very good and I couldn't spot any regressions.
Best,
Fabian
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From: ~jvolkman <jvolkman@git.sr.ht>
Date: Sat, 17 Dec 2022 01:00:18 +0000
Subject: [PATCH bazel-zig-cc 0/1] Adds supports_dynamic_linker feature
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I noticed that the default cc toolchain outputs .so files next to the
.a, and provides a "dynamic_library" output group. With bazel-zig-cc, an
attempt to use the "dynamic_library" output group fails with
> failed: Toolchain does not support dynamic linking
Maybe I'm missing something, but adding support seems as simple as
enabling the "supports_dynamic_linker" flag.
Jeremy Volkman (1):
Adds supports_dynamic_linker feature
toolchain/zig_toolchain.bzl | 6 ++++++
1 file changed, 6 insertions(+)
--
2.34.5
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From: ~jvolkman <jvolkman@git.sr.ht>
Date: Fri, 16 Dec 2022 16:44:57 -0800
Subject: [PATCH bazel-zig-cc 1/1] Adds supports_dynamic_linker feature
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From: Jeremy Volkman <jeremy@jvolkman.com>
With this feature, cc_library generates a .so as well as a .a and the
"dynamic_library" output group is enabled.
---
toolchain/zig_toolchain.bzl | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/toolchain/zig_toolchain.bzl b/toolchain/zig_toolchain.bzl
index f76aa80..2578973 100644
--- a/toolchain/zig_toolchain.bzl
+++ b/toolchain/zig_toolchain.bzl
@@ -129,9 +129,15 @@ def _zig_cc_toolchain_config_impl(ctx):
flag_sets = dynamic_library_flag_sets,
)
+ supports_dynamic_linker = feature(
+ name = "supports_dynamic_linker",
+ enabled = True,
+ )
+
features = [
compile_and_link_flags,
default_linker_flags,
+ supports_dynamic_linker,
] + _compilation_mode_features(ctx)
return cc_common.create_cc_toolchain_config_info(
--
2.34.5
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bazel-zig-cc/patches/.build.yml: SUCCESS in 18m7s
[Adds supports_dynamic_linker feature][0] from [~jvolkman][1]
[0]: https://lists.sr.ht/~motiejus/bazel-zig-cc/patches/37589
[1]: mailto:jeremy@jvolkman.com
=E2=9C=93 #906609 SUCCESS bazel-zig-cc/patches/.build.yml https://builds.sr=
.ht/~motiejus/job/906609
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From: ~jvolkman <jvolkman@git.sr.ht>
Date: Sat, 17 Dec 2022 19:28:05 +0000
Subject:
[PATCH bazel-zig-cc 0/2] Use -mcpu=apple_m1 when targeting macos + aarch64
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I ran into a build failure using bazel-zig-cc to build BoringSSL -
Google's OpenSSL fork that ships with Bazel rules. BoringSSL assumes
some features present on an M1 mac and fails if they're not present [1].
When using -target aarch64-macos.11-none, zig sets the cpu model to
"generic", as far as I can tell, which lacks a bunch of features -
including SHA2 and AES that BoringSSL is expecting. I think we can
assume that macos + aarch64 means at least an M1 ship, so instead we can
use the -mcpu=3Dapple_m1 flag which adds these features and more [3].
I also renamed _target_darwin to _target_macos to align with the Bazel
os name. I think darwin technically lies under iOS and Apple's other
mobile OSs as well.
1:
https://github.com/google/boringssl/blob/97dd962a20b1d19c9e569cf8756fbcfc48ff=
7c73/crypto/cpu_aarch64_apple.c#L56
2:
https://github.com/ziglang/zig/blob/90477e5c10c9c263a3c0038e1ae7b814d2c5397e/=
lib/std/target/aarch64.zig#L2031
3:
https://github.com/ziglang/zig/blob/90477e5c10c9c263a3c0038e1ae7b814d2c5397e/=
lib/std/target/aarch64.zig#L1507
Jeremy Volkman (2):
Rename _target_darwin to _target_macos
Use -mcpu=3Dapple_m1 when targeting macos + aarch64
toolchain/private/defs.bzl | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
--=20
2.34.5
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From: ~jvolkman <jvolkman@git.sr.ht>
Date: Sat, 17 Dec 2022 10:19:28 -0800
Subject: [PATCH bazel-zig-cc 1/2] Rename _target_darwin to _target_macos
Message-ID: <167130528597.14686.15641291907532780059-1@git.sr.ht>
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From: Jeremy Volkman <jeremy@cedarai.com>
This aligns with bazel's @platforms//os:macos
---
toolchain/private/defs.bzl | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/toolchain/private/defs.bzl b/toolchain/private/defs.bzl
index 96830ca..8387ce6 100644
--- a/toolchain/private/defs.bzl
+++ b/toolchain/private/defs.bzl
@@ -39,14 +39,14 @@ def zig_tool_path(os):
def target_structs():
ret = []
for zigcpu, gocpu in (("x86_64", "amd64"), ("aarch64", "arm64")):
- ret.append(_target_darwin(gocpu, zigcpu))
+ ret.append(_target_macos(gocpu, zigcpu))
ret.append(_target_windows(gocpu, zigcpu))
ret.append(_target_linux_musl(gocpu, zigcpu))
for glibc in _GLIBCS:
ret.append(_target_linux_gnu(gocpu, zigcpu, glibc))
return ret
-def _target_darwin(gocpu, zigcpu):
+def _target_macos(gocpu, zigcpu):
min_os = "11"
return struct(
gotarget = "darwin_{}".format(gocpu),
--
2.34.5
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From: ~jvolkman <jvolkman@git.sr.ht>
Date: Sat, 17 Dec 2022 10:26:04 -0800
Subject:
[PATCH bazel-zig-cc 2/2] Use -mcpu=apple_m1 when targeting macos + aarch64
Message-ID: <167130528597.14686.15641291907532780059-2@git.sr.ht>
X-Mailer: git.sr.ht
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To: ~motiejus/bazel-zig-cc@lists.sr.ht
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From: Jeremy Volkman <jeremy@cedarai.com>
---
toolchain/private/defs.bzl | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/toolchain/private/defs.bzl b/toolchain/private/defs.bzl
index 8387ce6..8571621 100644
--- a/toolchain/private/defs.bzl
+++ b/toolchain/private/defs.bzl
@@ -48,6 +48,11 @@ def target_structs():
def _target_macos(gocpu, zigcpu):
min_os = "11"
+ copts = []
+
+ if zigcpu == "aarch64":
+ copts = ["-mcpu=apple_m1"]
+
return struct(
gotarget = "darwin_{}".format(gocpu),
zigtarget = "{}-macos-none".format(zigcpu),
@@ -59,7 +64,7 @@ def _target_macos(gocpu, zigcpu):
"libc/include/any-macos-any",
] + _INCLUDE_TAIL,
dynamic_library_linkopts = ["-Wl,-undefined=dynamic_lookup"],
- copts = [],
+ copts = copts,
libc = "darwin",
bazel_target_cpu = "darwin",
constraint_values = [
--
2.34.5
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bazel-zig-cc/patches/.build.yml: SUCCESS in 18m11s
[Use -mcpu=3Dapple_m1 when targeting macos + aarch64][0] from [~jvolkman][1=
]
[0]: https://lists.sr.ht/~motiejus/bazel-zig-cc/patches/37601
[1]: mailto:jeremy@jvolkman.com
=E2=9C=93 #906945 SUCCESS bazel-zig-cc/patches/.build.yml https://builds.sr=
.ht/~motiejus/job/906945
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From: ~jvolkman <jvolkman@git.sr.ht>
Date: Sat, 17 Dec 2022 23:56:27 +0000
Subject: [PATCH bazel-zig-cc 0/1] Use artifact_name_pattern to specify proper
macos and windows artifact names
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I found that Bazel's cc toolchain system allows specifying artifact name
patterns. So we can make shared libraries end with ".dylib" on macos and
".dll" on Windows. This is likely a breaking change for anyone relying
on the defaults, but it seems like the proper thing to do, and the
built-in toolchains do the same thing.
There wasn't an obvious way to pass complex values from the
target_structs entries to the zig_cc_toolchain_config rule, so I opted
to pass a list of json-encoded strings. One other way I thought of was
to break the artifact_name_pattern parameters into
"artifact_name_prefixes" and "artifact_name_suffixes" dicts which would
fit into an attr.string_dict, but it was adding complexity for not much
gain IMO.
I based this patch on top of my other two recent patchsets. It might not
apply cleanly on top of main, but conflicts should be small.
Jeremy Volkman (1):
Use artifact_name_pattern to specify proper macos and windows artifact
names.
README.md | 11 -----------
toolchain/private/cc_toolchains.bzl | 5 +++++
toolchain/private/defs.bzl | 26 ++++++++++++++++++++++++++
toolchain/zig_toolchain.bzl | 7 +++++++
4 files changed, 38 insertions(+), 11 deletions(-)
--
2.34.5
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From: ~jvolkman <jvolkman@git.sr.ht>
Date: Sat, 17 Dec 2022 15:27:21 -0800
Subject: [PATCH bazel-zig-cc 1/1] Use artifact_name_pattern to specify proper
macos and windows artifact names.
Message-ID: <167132138766.5086.1705176352038753909-1@git.sr.ht>
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From: Jeremy Volkman <jeremy@cedarai.com>
On macos, dynamic libraries are generated as "libfoo.dylib".
On windows, executables end with ".exe", static libraries end with ".lib",
and dynamic libraries end with ".dll".
---
README.md | 11 -----------
toolchain/private/cc_toolchains.bzl | 5 +++++
toolchain/private/defs.bzl | 26 ++++++++++++++++++++++++++
toolchain/zig_toolchain.bzl | 7 +++++++
4 files changed, 38 insertions(+), 11 deletions(-)
diff --git a/README.md b/README.md
index c447ae8..3931247 100644
--- a/README.md
+++ b/README.md
@@ -338,17 +338,6 @@ is currently not implemented.
target macos.10 (Catalina), macos.11 (Big Sur) or macos.12 (Monterey). It
currently targets the lowest version, without ability to change it.
=20
-## Windows only: output file extensions
-
-For Windows targets Bazel uses Unix extensions for output binaries. Those may
-need to be renamed before deploying to the Windows system. Here is a primer:
-
-| Binary type | Bazel extension | Windows extension |
-|----------------|-----------------|-------------------|
-| Static library | .a | .lib |
-| Shared library | .so | .dll |
-| Executable | (no extension) | .exe |
-
# Known Issues In Upstream
=20
This section lists issues that I've stumbled into when using `zig cc`, and is
diff --git a/toolchain/private/cc_toolchains.bzl b/toolchain/private/cc_toolc=
hains.bzl
index 3fa0b93..a935ef5 100644
--- a/toolchain/private/cc_toolchains.bzl
+++ b/toolchain/private/cc_toolchains.bzl
@@ -39,6 +39,10 @@ def declare_cc_toolchains(os, zig_sdk_path):
for incl in getattr(target_config, "compiler_extra_includes", []):
copts =3D copts + ["-include", zig_sdk_path + "/" + incl]
=20
+ # We can't pass a list of structs to a rule, so we use json encoding.
+ artifact_name_patterns =3D getattr(target_config, "artifact_name_pat=
terns", [])
+ artifact_name_pattern_strings =3D [json.encode(p) for p in artifact_=
name_patterns]
+
zig_cc_toolchain_config(
name =3D zigtarget + "_cc_config",
target =3D zigtarget,
@@ -53,6 +57,7 @@ def declare_cc_toolchains(os, zig_sdk_path):
compiler =3D "clang",
abi_version =3D "unknown",
abi_libc_version =3D "unknown",
+ artifact_name_patterns =3D artifact_name_pattern_strings,
visibility =3D ["//visibility:private"],
)
=20
diff --git a/toolchain/private/defs.bzl b/toolchain/private/defs.bzl
index 8571621..9409f5e 100644
--- a/toolchain/private/defs.bzl
+++ b/toolchain/private/defs.bzl
@@ -72,6 +72,13 @@ def _target_macos(gocpu, zigcpu):
"@platforms//cpu:{}".format(zigcpu),
],
tool_paths =3D {"ld": "ld64.lld"},
+ artifact_name_patterns =3D [
+ {
+ "category_name": "dynamic_library",
+ "prefix": "lib",
+ "extension": ".dylib",
+ },
+ ],
)
=20
def _target_windows(gocpu, zigcpu):
@@ -92,6 +99,23 @@ def _target_windows(gocpu, zigcpu):
"@platforms//cpu:{}".format(zigcpu),
],
tool_paths =3D {"ld": "ld64.lld"},
+ artifact_name_patterns =3D [
+ {
+ "category_name": "static_library",
+ "prefix": "",
+ "extension": ".lib",
+ },
+ {
+ "category_name": "dynamic_library",
+ "prefix": "",
+ "extension": ".dll",
+ },
+ {
+ "category_name": "executable",
+ "prefix": "",
+ "extension": ".exe",
+ },
+ ],
)
=20
def _target_linux_gnu(gocpu, zigcpu, glibc_version):
@@ -126,6 +150,7 @@ def _target_linux_gnu(gocpu, zigcpu, glibc_version):
],
libc_constraint =3D "@zig_sdk//libc:{}".format(glibc_suffix),
tool_paths =3D {"ld": "ld.lld"},
+ artifact_name_patterns =3D [],
)
=20
def _target_linux_musl(gocpu, zigcpu):
@@ -151,4 +176,5 @@ def _target_linux_musl(gocpu, zigcpu):
],
libc_constraint =3D "@zig_sdk//libc:musl",
tool_paths =3D {"ld": "ld.lld"},
+ artifact_name_patterns =3D [],
)
diff --git a/toolchain/zig_toolchain.bzl b/toolchain/zig_toolchain.bzl
index 2578973..974221f 100644
--- a/toolchain/zig_toolchain.bzl
+++ b/toolchain/zig_toolchain.bzl
@@ -1,6 +1,7 @@
load("@bazel_tools//tools/build_defs/cc:action_names.bzl", "ACTION_NAMES")
load(
"@bazel_tools//tools/cpp:cc_toolchain_config_lib.bzl",
+ "artifact_name_pattern",
"feature",
"feature_set",
"flag_group",
@@ -140,6 +141,10 @@ def _zig_cc_toolchain_config_impl(ctx):
supports_dynamic_linker,
] + _compilation_mode_features(ctx)
=20
+ artifact_name_patterns =3D [
+ artifact_name_pattern(**json.decode(p)) for p in ctx.attr.artifact_n=
ame_patterns
+ ]
+
return cc_common.create_cc_toolchain_config_info(
ctx =3D ctx,
features =3D features,
@@ -156,6 +161,7 @@ def _zig_cc_toolchain_config_impl(ctx):
for name, path in ctx.attr.tool_paths.items()
],
cxx_builtin_include_directories =3D ctx.attr.cxx_builtin_include_dir=
ectories,
+ artifact_name_patterns =3D artifact_name_patterns,
)
=20
zig_cc_toolchain_config =3D rule(
@@ -174,6 +180,7 @@ zig_cc_toolchain_config =3D rule(
"compiler": attr.string(),
"abi_version": attr.string(),
"abi_libc_version": attr.string(),
+ "artifact_name_patterns": attr.string_list(),
},
provides =3D [CcToolchainConfigInfo],
)
--=20
2.34.5
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[Use artifact_name_pattern to specify proper macos and windows artifact nam=
es][0] from [~jvolkman][1]
[0]: https://lists.sr.ht/~motiejus/bazel-zig-cc/patches/37613
[1]: mailto:jeremy@jvolkman.com
=E2=9C=97 #907041 FAILED bazel-zig-cc/patches/.build.yml https://builds.sr.=
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Subject: [PATCH bazel-zig-cc v2 0/1] Use artifact_name_pattern to specify
proper macos and windows artifact names
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[This is the second revision which should apply cleanly to the main
branch]
I found that Bazel's cc toolchain system allows specifying artifact name
patterns. So we can make shared libraries end with ".dylib" on macos and
".dll" on Windows. This is likely a breaking change for anyone relying
on the defaults, but it seems like the proper thing to do, and the
built-in toolchains do the same thing.
There wasn't an obvious way to pass complex values from the
target_structs entries to the zig_cc_toolchain_config rule, so I opted
to pass a list of json-encoded strings. One other way I thought of was
to break the artifact_name_pattern parameters into
"artifact_name_prefixes" and "artifact_name_suffixes" dicts which would
fit into an attr.string_dict, but it was adding complexity for not much
gain IMO.
Jeremy Volkman (1):
Use artifact_name_pattern to specify proper macos and windows artifact
names.
README.md | 11 -----------
toolchain/private/cc_toolchains.bzl | 5 +++++
toolchain/private/defs.bzl | 26 ++++++++++++++++++++++++++
toolchain/zig_toolchain.bzl | 7 +++++++
4 files changed, 38 insertions(+), 11 deletions(-)
--
2.34.5
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Date: Sat, 17 Dec 2022 15:27:21 -0800
Subject: [PATCH bazel-zig-cc v2 1/1] Use artifact_name_pattern to specify
proper macos and windows artifact names.
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From: Jeremy Volkman <jeremy@cedarai.com>
On macos, dynamic libraries are generated as "libfoo.dylib".
On windows, executables end with ".exe", static libraries end with ".lib",
and dynamic libraries end with ".dll".
---
README.md | 11 -----------
toolchain/private/cc_toolchains.bzl | 5 +++++
toolchain/private/defs.bzl | 26 ++++++++++++++++++++++++++
toolchain/zig_toolchain.bzl | 7 +++++++
4 files changed, 38 insertions(+), 11 deletions(-)
diff --git a/README.md b/README.md
index c447ae8..3931247 100644
--- a/README.md
+++ b/README.md
@@ -338,17 +338,6 @@ is currently not implemented.
target macos.10 (Catalina), macos.11 (Big Sur) or macos.12 (Monterey). It
currently targets the lowest version, without ability to change it.
=20
-## Windows only: output file extensions
-
-For Windows targets Bazel uses Unix extensions for output binaries. Those may
-need to be renamed before deploying to the Windows system. Here is a primer:
-
-| Binary type | Bazel extension | Windows extension |
-|----------------|-----------------|-------------------|
-| Static library | .a | .lib |
-| Shared library | .so | .dll |
-| Executable | (no extension) | .exe |
-
# Known Issues In Upstream
=20
This section lists issues that I've stumbled into when using `zig cc`, and is
diff --git a/toolchain/private/cc_toolchains.bzl b/toolchain/private/cc_toolc=
hains.bzl
index 3fa0b93..a935ef5 100644
--- a/toolchain/private/cc_toolchains.bzl
+++ b/toolchain/private/cc_toolchains.bzl
@@ -39,6 +39,10 @@ def declare_cc_toolchains(os, zig_sdk_path):
for incl in getattr(target_config, "compiler_extra_includes", []):
copts =3D copts + ["-include", zig_sdk_path + "/" + incl]
=20
+ # We can't pass a list of structs to a rule, so we use json encoding.
+ artifact_name_patterns =3D getattr(target_config, "artifact_name_pat=
terns", [])
+ artifact_name_pattern_strings =3D [json.encode(p) for p in artifact_=
name_patterns]
+
zig_cc_toolchain_config(
name =3D zigtarget + "_cc_config",
target =3D zigtarget,
@@ -53,6 +57,7 @@ def declare_cc_toolchains(os, zig_sdk_path):
compiler =3D "clang",
abi_version =3D "unknown",
abi_libc_version =3D "unknown",
+ artifact_name_patterns =3D artifact_name_pattern_strings,
visibility =3D ["//visibility:private"],
)
=20
diff --git a/toolchain/private/defs.bzl b/toolchain/private/defs.bzl
index 96830ca..3ff4cd0 100644
--- a/toolchain/private/defs.bzl
+++ b/toolchain/private/defs.bzl
@@ -67,6 +67,13 @@ def _target_darwin(gocpu, zigcpu):
"@platforms//cpu:{}".format(zigcpu),
],
tool_paths =3D {"ld": "ld64.lld"},
+ artifact_name_patterns =3D [
+ {
+ "category_name": "dynamic_library",
+ "prefix": "lib",
+ "extension": ".dylib",
+ },
+ ],
)
=20
def _target_windows(gocpu, zigcpu):
@@ -87,6 +94,23 @@ def _target_windows(gocpu, zigcpu):
"@platforms//cpu:{}".format(zigcpu),
],
tool_paths =3D {"ld": "ld64.lld"},
+ artifact_name_patterns =3D [
+ {
+ "category_name": "static_library",
+ "prefix": "",
+ "extension": ".lib",
+ },
+ {
+ "category_name": "dynamic_library",
+ "prefix": "",
+ "extension": ".dll",
+ },
+ {
+ "category_name": "executable",
+ "prefix": "",
+ "extension": ".exe",
+ },
+ ],
)
=20
def _target_linux_gnu(gocpu, zigcpu, glibc_version):
@@ -121,6 +145,7 @@ def _target_linux_gnu(gocpu, zigcpu, glibc_version):
],
libc_constraint =3D "@zig_sdk//libc:{}".format(glibc_suffix),
tool_paths =3D {"ld": "ld.lld"},
+ artifact_name_patterns =3D [],
)
=20
def _target_linux_musl(gocpu, zigcpu):
@@ -146,4 +171,5 @@ def _target_linux_musl(gocpu, zigcpu):
],
libc_constraint =3D "@zig_sdk//libc:musl",
tool_paths =3D {"ld": "ld.lld"},
+ artifact_name_patterns =3D [],
)
diff --git a/toolchain/zig_toolchain.bzl b/toolchain/zig_toolchain.bzl
index f76aa80..7bd31ee 100644
--- a/toolchain/zig_toolchain.bzl
+++ b/toolchain/zig_toolchain.bzl
@@ -1,6 +1,7 @@
load("@bazel_tools//tools/build_defs/cc:action_names.bzl", "ACTION_NAMES")
load(
"@bazel_tools//tools/cpp:cc_toolchain_config_lib.bzl",
+ "artifact_name_pattern",
"feature",
"feature_set",
"flag_group",
@@ -134,6 +135,10 @@ def _zig_cc_toolchain_config_impl(ctx):
default_linker_flags,
] + _compilation_mode_features(ctx)
=20
+ artifact_name_patterns =3D [
+ artifact_name_pattern(**json.decode(p)) for p in ctx.attr.artifact_n=
ame_patterns
+ ]
+
return cc_common.create_cc_toolchain_config_info(
ctx =3D ctx,
features =3D features,
@@ -150,6 +155,7 @@ def _zig_cc_toolchain_config_impl(ctx):
for name, path in ctx.attr.tool_paths.items()
],
cxx_builtin_include_directories =3D ctx.attr.cxx_builtin_include_dir=
ectories,
+ artifact_name_patterns =3D artifact_name_patterns,
)
=20
zig_cc_toolchain_config =3D rule(
@@ -168,6 +174,7 @@ zig_cc_toolchain_config =3D rule(
"compiler": attr.string(),
"abi_version": attr.string(),
"abi_libc_version": attr.string(),
+ "artifact_name_patterns": attr.string_list(),
},
provides =3D [CcToolchainConfigInfo],
)
--=20
2.34.5
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[Use artifact_name_pattern to specify proper macos and windows artifact nam=
es][0] v2 from [~jvolkman][1]
[0]: https://lists.sr.ht/~motiejus/bazel-zig-cc/patches/37614
[1]: mailto:jeremy@jvolkman.com
=E2=9C=97 #907046 FAILED bazel-zig-cc/patches/.build.yml https://builds.sr.=
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Date: Sun, 18 Dec 2022 00:18:23 +0000
Subject: [PATCH bazel-zig-cc v3 0/1] Use artifact_name_pattern to specify
proper macos and windows artifact names
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Changelog:
# v2: should apply cleanly to the main branch
# v3: fix a linter error
I found that Bazel's cc toolchain system allows specifying artifact name
patterns. So we can make shared libraries end with ".dylib" on macos and
".dll" on Windows. This is likely a breaking change for anyone relying
on the defaults, but it seems like the proper thing to do, and the
built-in toolchains do the same thing.
There wasn't an obvious way to pass complex values from the
target_structs entries to the zig_cc_toolchain_config rule, so I opted
to pass a list of json-encoded strings. One other way I thought of was
to break the artifact_name_pattern parameters into
"artifact_name_prefixes" and "artifact_name_suffixes" dicts which would
fit into an attr.string_dict, but it was adding complexity for not much
gain IMO.
Jeremy Volkman (1):
Use artifact_name_pattern to specify proper macos and windows artifact
names.
README.md | 11 -----------
toolchain/private/cc_toolchains.bzl | 5 +++++
toolchain/private/defs.bzl | 26 ++++++++++++++++++++++++++
toolchain/zig_toolchain.bzl | 8 ++++++++
4 files changed, 39 insertions(+), 11 deletions(-)
--
2.34.5
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From: ~jvolkman <jvolkman@git.sr.ht>
Date: Sat, 17 Dec 2022 15:27:21 -0800
Subject: [PATCH bazel-zig-cc v3 1/1] Use artifact_name_pattern to specify
proper macos and windows artifact names.
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From: Jeremy Volkman <jeremy@cedarai.com>
On macos, dynamic libraries are generated as "libfoo.dylib".
On windows, executables end with ".exe", static libraries end with ".lib",
and dynamic libraries end with ".dll".
---
README.md | 11 -----------
toolchain/private/cc_toolchains.bzl | 5 +++++
toolchain/private/defs.bzl | 26 ++++++++++++++++++++++++++
toolchain/zig_toolchain.bzl | 8 ++++++++
4 files changed, 39 insertions(+), 11 deletions(-)
diff --git a/README.md b/README.md
index c447ae8..3931247 100644
--- a/README.md
+++ b/README.md
@@ -338,17 +338,6 @@ is currently not implemented.
target macos.10 (Catalina), macos.11 (Big Sur) or macos.12 (Monterey). It
currently targets the lowest version, without ability to change it.
=20
-## Windows only: output file extensions
-
-For Windows targets Bazel uses Unix extensions for output binaries. Those may
-need to be renamed before deploying to the Windows system. Here is a primer:
-
-| Binary type | Bazel extension | Windows extension |
-|----------------|-----------------|-------------------|
-| Static library | .a | .lib |
-| Shared library | .so | .dll |
-| Executable | (no extension) | .exe |
-
# Known Issues In Upstream
=20
This section lists issues that I've stumbled into when using `zig cc`, and is
diff --git a/toolchain/private/cc_toolchains.bzl b/toolchain/private/cc_toolc=
hains.bzl
index 3fa0b93..a935ef5 100644
--- a/toolchain/private/cc_toolchains.bzl
+++ b/toolchain/private/cc_toolchains.bzl
@@ -39,6 +39,10 @@ def declare_cc_toolchains(os, zig_sdk_path):
for incl in getattr(target_config, "compiler_extra_includes", []):
copts =3D copts + ["-include", zig_sdk_path + "/" + incl]
=20
+ # We can't pass a list of structs to a rule, so we use json encoding.
+ artifact_name_patterns =3D getattr(target_config, "artifact_name_pat=
terns", [])
+ artifact_name_pattern_strings =3D [json.encode(p) for p in artifact_=
name_patterns]
+
zig_cc_toolchain_config(
name =3D zigtarget + "_cc_config",
target =3D zigtarget,
@@ -53,6 +57,7 @@ def declare_cc_toolchains(os, zig_sdk_path):
compiler =3D "clang",
abi_version =3D "unknown",
abi_libc_version =3D "unknown",
+ artifact_name_patterns =3D artifact_name_pattern_strings,
visibility =3D ["//visibility:private"],
)
=20
diff --git a/toolchain/private/defs.bzl b/toolchain/private/defs.bzl
index 96830ca..3ff4cd0 100644
--- a/toolchain/private/defs.bzl
+++ b/toolchain/private/defs.bzl
@@ -67,6 +67,13 @@ def _target_darwin(gocpu, zigcpu):
"@platforms//cpu:{}".format(zigcpu),
],
tool_paths =3D {"ld": "ld64.lld"},
+ artifact_name_patterns =3D [
+ {
+ "category_name": "dynamic_library",
+ "prefix": "lib",
+ "extension": ".dylib",
+ },
+ ],
)
=20
def _target_windows(gocpu, zigcpu):
@@ -87,6 +94,23 @@ def _target_windows(gocpu, zigcpu):
"@platforms//cpu:{}".format(zigcpu),
],
tool_paths =3D {"ld": "ld64.lld"},
+ artifact_name_patterns =3D [
+ {
+ "category_name": "static_library",
+ "prefix": "",
+ "extension": ".lib",
+ },
+ {
+ "category_name": "dynamic_library",
+ "prefix": "",
+ "extension": ".dll",
+ },
+ {
+ "category_name": "executable",
+ "prefix": "",
+ "extension": ".exe",
+ },
+ ],
)
=20
def _target_linux_gnu(gocpu, zigcpu, glibc_version):
@@ -121,6 +145,7 @@ def _target_linux_gnu(gocpu, zigcpu, glibc_version):
],
libc_constraint =3D "@zig_sdk//libc:{}".format(glibc_suffix),
tool_paths =3D {"ld": "ld.lld"},
+ artifact_name_patterns =3D [],
)
=20
def _target_linux_musl(gocpu, zigcpu):
@@ -146,4 +171,5 @@ def _target_linux_musl(gocpu, zigcpu):
],
libc_constraint =3D "@zig_sdk//libc:musl",
tool_paths =3D {"ld": "ld.lld"},
+ artifact_name_patterns =3D [],
)
diff --git a/toolchain/zig_toolchain.bzl b/toolchain/zig_toolchain.bzl
index f76aa80..bebd1da 100644
--- a/toolchain/zig_toolchain.bzl
+++ b/toolchain/zig_toolchain.bzl
@@ -1,6 +1,7 @@
load("@bazel_tools//tools/build_defs/cc:action_names.bzl", "ACTION_NAMES")
load(
"@bazel_tools//tools/cpp:cc_toolchain_config_lib.bzl",
+ "artifact_name_pattern",
"feature",
"feature_set",
"flag_group",
@@ -134,6 +135,11 @@ def _zig_cc_toolchain_config_impl(ctx):
default_linker_flags,
] + _compilation_mode_features(ctx)
=20
+ artifact_name_patterns =3D [
+ artifact_name_pattern(**json.decode(p))
+ for p in ctx.attr.artifact_name_patterns
+ ]
+
return cc_common.create_cc_toolchain_config_info(
ctx =3D ctx,
features =3D features,
@@ -150,6 +156,7 @@ def _zig_cc_toolchain_config_impl(ctx):
for name, path in ctx.attr.tool_paths.items()
],
cxx_builtin_include_directories =3D ctx.attr.cxx_builtin_include_dir=
ectories,
+ artifact_name_patterns =3D artifact_name_patterns,
)
=20
zig_cc_toolchain_config =3D rule(
@@ -168,6 +175,7 @@ zig_cc_toolchain_config =3D rule(
"compiler": attr.string(),
"abi_version": attr.string(),
"abi_libc_version": attr.string(),
+ "artifact_name_patterns": attr.string_list(),
},
provides =3D [CcToolchainConfigInfo],
)
--=20
2.34.5
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[Use artifact_name_pattern to specify proper macos and windows artifact nam=
es][0] v3 from [~jvolkman][1]
[0]: https://lists.sr.ht/~motiejus/bazel-zig-cc/patches/37615
[1]: mailto:jeremy@jvolkman.com
=E2=9C=93 #907052 SUCCESS bazel-zig-cc/patches/.build.yml https://builds.sr=
.ht/~motiejus/job/907052
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From: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Date: Sun, 18 Dec 2022 05:33:04 +0200
Message-ID: <CAFVMu-qp3cuDjMvQ9_qhFHXziN+iOwinPYN9=0d9Qqu17BSv4Q@mail.gmail.com>
Subject: Re: [PATCH bazel-zig-cc v3 1/1] Use artifact_name_pattern to specify
proper macos and windows artifact names.
To: "~jvolkman" <jeremy@jvolkman.com>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht
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On Sun, Dec 18, 2022 at 2:18 AM ~jvolkman <jvolkman@git.sr.ht> wrote:
>
> From: Jeremy Volkman <jeremy@cedarai.com>
>
> On macos, dynamic libraries are generated as "libfoo.dylib".
>
> On windows, executables end with ".exe", static libraries end with ".lib",
> and dynamic libraries end with ".dll".
> ---
> README.md | 11 -----------
> toolchain/private/cc_toolchains.bzl | 5 +++++
> toolchain/private/defs.bzl | 26 ++++++++++++++++++++++++++
> toolchain/zig_toolchain.bzl | 8 ++++++++
> 4 files changed, 39 insertions(+), 11 deletions(-)
Thanks! Applied all 4 patches verbatim.
Motiejus
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From: ~motiejus <motiejus@git.sr.ht>
Date: Fri, 23 Dec 2022 11:04:31 +0000
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Subject:
[PATCH bazel-zig-cc 0/1] zig launcher: replace shell wrappers with a binary
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TLDR: I am looking to replace the two (unix and windows) shell scripts
with a single program with unit tests. Motivations and more discussion
in the commit message. If there are any concerns with it, it is a great
time to raise them.
Fabian, I did my best to test this "on windows" without actually having
a windows host. Please let me know if it works for you. Hopefully I
don't break the windows wrapper ever again!
Motiejus Jak=C5=A1tys (1):
zig launcher: replace shell wrappers with a binary
.build.yml | 9 +-
ci/launcher | 13 +
ci/test | 25 +-
toolchain/defs.bzl | 128 +++------
toolchain/launcher.zig | 531 +++++++++++++++++++++++++++++++++++++
toolchain/private/defs.bzl | 2 +-
6 files changed, 613 insertions(+), 95 deletions(-)
create mode 100755 ci/launcher
create mode 100644 toolchain/launcher.zig
--=20
2.34.5
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From: ~motiejus <motiejus@git.sr.ht>
Date: Tue, 20 Dec 2022 17:00:50 +0200
Subject:
[PATCH bazel-zig-cc 1/1] zig launcher: replace shell wrappers with a binary
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From: Motiejus Jak=C5=A1tys <motiejus@uber.com>
Until now we needed to maintain two versions of the zig launcher: one
for Windows and one for everything else. This was problematic for two
reasons:
1. I do not know powershell and thus keep breaking the Windows wrapper
all the time (see git history of Fabian fixing stuff that I broke).
2. This makes bazel-zig-cc dependent on the system shell, making it not
really hermetic. So the recently added
`--experimental_use_hermetic_linux_sandbox` does not work with
bazel-zig-cc, unless we bind-mount a bunch of stuff: `/usr`, `/bin`,
`/lib`, `/usr/lib:/lib`, `/usr/lib64:/lib64` and `/proc`.
Switching to a Zig-based wrapper solves both issues, and we can do this:
bazel build "$@" \
--experimental_use_hermetic_linux_sandbox \
--sandbox_add_mount_pair=3D/proc \
<...>
Zig itself still depends on `/proc` for `/proc/self/exe`, so we need to
keep that. I will look into reducing even that dependency separately.
Not all is nice and shiny though: this commit replaces ~80 LOC worth of
shell scripts wrappers with a singe ~250 LOC zig program, which is
arguably harder to understand. However, it is easier to change, at least
for me, because it's a single file with unit tests! Most importantly,
the gnarly code (which resolves paths and sets environment variables) is
cross-platform.
---
.build.yml | 9 +-
ci/launcher | 13 +
ci/test | 25 +-
toolchain/defs.bzl | 128 +++------
toolchain/launcher.zig | 531 +++++++++++++++++++++++++++++++++++++
toolchain/private/defs.bzl | 2 +-
6 files changed, 613 insertions(+), 95 deletions(-)
create mode 100755 ci/launcher
create mode 100644 toolchain/launcher.zig
diff --git a/.build.yml b/.build.yml
index 664b847..e12a558 100644
--- a/.build.yml
+++ b/.build.yml
@@ -31,6 +31,13 @@ tasks:
- list_toolchains_platforms: |
cd bazel-zig-cc; . .envrc
./ci/list_toolchains_platforms
+ - test_launcher: |
+ cd bazel-zig-cc; . .envrc
+ ./ci/launcher --color=3Dyes --curses=3Dyes
- test: |
cd bazel-zig-cc; . .envrc
- ./ci/test --color=3Dyes --curses=3Dyes
+ export BAZEL_ZIG_CC_CACHE_PREFIX=3D/tmp/bazel-zig-cc-2
+ ./ci/test \
+ --color=3Dyes --curses=3Dyes \
+ --repo_env BAZEL_ZIG_CC_CACHE_PREFIX=3D$BAZEL_ZIG_CC_CACHE_PREFIX \
+ --sandbox_writable_path "$BAZEL_ZIG_CC_CACHE_PREFIX"
diff --git a/ci/launcher b/ci/launcher
new file mode 100755
index 0000000..2c57c8f
--- /dev/null
+++ b/ci/launcher
@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+set -xeuo pipefail
+
+# until bazel-zig-cc gets a zig toolchain, run launcher's unit tests here.
+bazel run "$@" @zig_sdk//:zig -- test toolchain/launcher.zig
+
+# ReleaseSafe because of https://github.com/ziglang/zig/issues/14036
+bazel run "$@" @zig_sdk//:zig -- test \
+ -OReleaseSafe \
+ -target x86_64-windows-gnu \
+ --test-cmd wine64-stable \
+ --test-cmd-bin \
+ toolchain/launcher.zig
diff --git a/ci/test b/ci/test
index e3f4cf5..4cbc3ca 100755
--- a/ci/test
+++ b/ci/test
@@ -1,16 +1,29 @@
#!/usr/bin/env bash
-set -euo pipefail
+set -xeuo pipefail
+
+BAZEL_ZIG_CC_CACHE_PREFIX=3D${BAZEL_ZIG_CC_CACHE_PREFIX:-/tmp/bazel-zig-cc}
+mkdir -p "${BAZEL_ZIG_CC_CACHE_PREFIX}"
=20
bazel test "$@" ...
=20
-# /tmp/bazel-zig-cc should be empty for the test below to be valid.
-# This test ensures that github.com/ziglang/zig/issues/13050 does not
-# regress
-find /tmp/bazel-zig-cc -name mutex_destructor.o -execdir file '{}' \; | \
+bazel clean; bazel shutdown
+
+# smoke-test a very hermetic setup with a single target. Re-building all of
+# them takes a long time, so using only one. If we ever decide to build all
+# targets, we will need to exclude Go, since go dynamically links to glibc on
+# linux.
+bazel build "$@" \
+ --experimental_use_hermetic_linux_sandbox \
+ --sandbox_add_mount_pair=3D/proc \
+ //test/c:which_libc_linux_amd64_gnu.2.19
+
+# $BAZEL_ZIG_CC_CACHE_PREFIX should be empty for the test below to be valid.
+# Ensure that github.com/ziglang/zig/issues/13050 does not regress
+find "$BAZEL_ZIG_CC_CACHE_PREFIX" -name mutex_destructor.o -execdir file '{}=
' \; | \
sort | uniq -c | sort -rn > /tmp/got_cache
=20
diff -u ci/testdata/want_cache /tmp/got_cache || {
>&2 echo "ERROR: unexpected artifacts."
- >&2 echo "Was /tmp/bazel-zig-cc empty before the test?"
+ >&2 echo "Was $BAZEL_ZIG_CC_CACHE_PREFIX empty before the test?"
exit 1
}
diff --git a/toolchain/defs.bzl b/toolchain/defs.bzl
index dfd1ef8..483d9fa 100644
--- a/toolchain/defs.bzl
+++ b/toolchain/defs.bzl
@@ -1,3 +1,4 @@
+load("@bazel_skylib//lib:paths.bzl", "paths")
load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
load("@bazel_tools//tools/build_defs/repo:utils.bzl", "read_user_netrc", "us=
e_netrc")
load("@bazel-zig-cc//toolchain/private:defs.bzl", "target_structs", "zig_too=
l_path")
@@ -79,83 +80,8 @@ def toolchains(
_ZIG_TOOLS =3D [
"c++",
"ar",
- "build-exe",
- "build-lib",
- "build-obj",
]
=20
-_ZIG_TOOL_WRAPPER_WINDOWS_CACHE =3D """@echo off
-if exist "external\\zig_sdk\\lib\\*" goto :have_external_zig_sdk_lib
-set ZIG_LIB_DIR=3D%~dp0\\..\\..\\lib
-set ZIG_EXE=3D%~dp0\\..\\..\\zig.exe
-goto :set_zig_lib_dir
-:have_external_zig_sdk_lib
-set ZIG_LIB_DIR=3Dexternal\\zig_sdk\\lib
-set ZIG_EXE=3Dexternal\\zig_sdk\\zig.exe
-:set_zig_lib_dir
-set ZIG_LOCAL_CACHE_DIR=3D{cache_prefix}\\bazel-zig-cc
-set ZIG_GLOBAL_CACHE_DIR=3D%ZIG_LOCAL_CACHE_DIR%
-"%ZIG_EXE%" "{zig_tool}" {maybe_target} %*
-"""
-
-_ZIG_TOOL_WRAPPER_CACHE =3D """#!/bin/sh
-set -e
-if [ -d external/zig_sdk/lib ]; then
- ZIG_LIB_DIR=3Dexternal/zig_sdk/lib
- ZIG_EXE=3Dexternal/zig_sdk/zig
-else
- ZIG_LIB_DIR=3D"$(dirname "$0")/../../lib"
- ZIG_EXE=3D"$(dirname "$0")/../../zig"
-fi
-export ZIG_LIB_DIR
-export ZIG_LOCAL_CACHE_DIR=3D"{cache_prefix}/bazel-zig-cc"
-export ZIG_GLOBAL_CACHE_DIR=3D"{cache_prefix}/bazel-zig-cc"
-{maybe_gohack}
-exec "$ZIG_EXE" "{zig_tool}" {maybe_target} "$@"
-"""
-
-# The hackery below will be deleted after Go 1.20 is released (in particular,
-# if/after https://go-review.googlesource.com/c/go/+/436884 )
-# Arg-messing snippet from
-# https://web.archive.org/web/20100129154217/http://www.seanius.net/blog/200=
9/03/saving-and-restoring-positional-params
-_ZIG_TOOL_GOHACK =3D """
-quote(){ echo "$1" | sed -e "s,','\\\\'',g"; }
-for arg in "$@"; do saved=3D"${saved:+$saved }'$(quote "$arg")'"; done
-while [ "$#" -gt 6 ]; do shift; done
-if [ "$*" =3D "-Wl,--no-gc-sections -x c - -o /dev/null" ]; then
- # This command probes if `--no-gc-sections` is accepted by the linker.
- # Since it is executed in /tmp, the ZIG_LIB_DIR is absolute,
- # glibc stubs and libc++ cannot be shared with other invocations (which use
- # a relative ZIG_LIB_DIR).
- exit 0;
-fi
-eval set -- "$saved"
-"""
-
-def _zig_tool_wrapper(zig_tool, is_windows, cache_prefix, zigtarget):
- if zig_tool in ["c++", "build-exe", "build-lib", "build-obj"]:
- maybe_target =3D "-target {}".format(zigtarget)
- else:
- maybe_target =3D ""
-
- if not cache_prefix:
- if is_windows:
- cache_prefix =3D "C:\\Temp\\bazel-zig-cc"
- else:
- cache_prefix =3D "/tmp/bazel-zig-cc"
-
- kwargs =3D dict(
- zig_tool =3D zig_tool,
- cache_prefix =3D cache_prefix,
- maybe_gohack =3D _ZIG_TOOL_GOHACK if (zig_tool =3D=3D "c++" and not =
is_windows) else "",
- maybe_target =3D maybe_target,
- )
-
- if is_windows:
- return _ZIG_TOOL_WRAPPER_WINDOWS_CACHE.format(**kwargs)
- else:
- return _ZIG_TOOL_WRAPPER_CACHE.format(**kwargs)
-
def _quote(s):
return "'" + s.replace("'", "'\\''") + "'"
=20
@@ -217,22 +143,50 @@ def _zig_repository_impl(repository_ctx):
sha256 =3D zig_sha256,
)
=20
+ cache_prefix =3D repository_ctx.os.environ.get("BAZEL_ZIG_CC_CACHE_PREFI=
X", "")
+ if cache_prefix =3D=3D "":
+ if os =3D=3D "windows":
+ cache_prefix =3D "C:\\Temp\\bazel-zig-cc"
+ else:
+ cache_prefix =3D "/tmp/bazel-zig-cc"
+
+ repository_ctx.template(
+ "tools/launcher.zig",
+ Label("//toolchain:launcher.zig"),
+ executable =3D False,
+ substitutions =3D {
+ "{BAZEL_ZIG_CC_CACHE_PREFIX}": cache_prefix,
+ },
+ )
+
+ ret =3D repository_ctx.execute(
+ [
+ paths.join("..", "zig"),
+ "build-exe",
+ "-OReleaseSafe",
+ "launcher.zig",
+ ] + (["-static"] if os =3D=3D "linux" else []),
+ working_directory =3D "tools",
+ environment =3D {
+ "ZIG_LOCAL_CACHE_DIR": cache_prefix,
+ "ZIG_GLOBAL_CACHE_DIR": cache_prefix,
+ },
+ )
+ if ret.return_code !=3D 0:
+ fail("compilation failed:\nreturn_code=3D{}\nstderr=3D{}\nstdout=3D{=
}".format(
+ ret.return_code,
+ ret.stdout,
+ ret.stderr,
+ ))
+
+ exe =3D ".exe" if os =3D=3D "windows" else ""
for target_config in target_structs():
for zig_tool in _ZIG_TOOLS + target_config.tool_paths.values():
- zig_tool_wrapper =3D _zig_tool_wrapper(
- zig_tool,
- os =3D=3D "windows",
- repository_ctx.os.environ.get("BAZEL_ZIG_CC_CACHE_PREFIX", "=
"),
+ tool_path =3D zig_tool_path(os).format(
+ zig_tool =3D zig_tool,
zigtarget =3D target_config.zigtarget,
)
-
- repository_ctx.file(
- zig_tool_path(os).format(
- zig_tool =3D zig_tool,
- zigtarget =3D target_config.zigtarget,
- ),
- zig_tool_wrapper,
- )
+ repository_ctx.symlink("tools/launcher{}".format(exe), tool_path)
=20
repository_ctx.file(
"glibc-hacks/fcntl.map",
diff --git a/toolchain/launcher.zig b/toolchain/launcher.zig
new file mode 100644
index 0000000..0cf86e8
--- /dev/null
+++ b/toolchain/launcher.zig
@@ -0,0 +1,531 @@
+// A wrapper for `zig` subcommands.
+//
+// In simple cases it is usually enough to:
+//
+// zig c++ -target <triple> <...>
+//
+// However, there are some caveats:
+//
+// * Sometimes toolchains (looking at you, Go, see an example in
+// https://github.com/golang/go/pull/55966) skip CFLAGS to the underlying
+// compiler. Doing that may carry a huge cost, because zig may need to spend
+// ~30s compiling libc++ for an innocent feature test. Having an executable =
per
+// target platform (like GCC does things, e.g. aarch64-linux-gnu-<tool>) is
+// what most toolchains are designed to work with. So we need a wrapper per
+// zig sub-command per target. As of writing, the layout is:
+// tools/
+// =E2=94=9C=E2=94=80=E2=94=80 x86_64-linux-gnu.2.34
+// =E2=94=82=C2=A0=C2=A0 =E2=94=9C=E2=94=80=E2=94=80 ar
+// =E2=94=82=C2=A0=C2=A0 =E2=94=9C=E2=94=80=E2=94=80 c++
+// =E2=94=82=C2=A0=C2=A0 =E2=94=94=E2=94=80=E2=94=80 ld.lld
+// =E2=94=9C=E2=94=80=E2=94=80 x86_64-linux-musl
+// =E2=94=82=C2=A0=C2=A0 =E2=94=9C=E2=94=80=E2=94=80 ar
+// =E2=94=82=C2=A0=C2=A0 =E2=94=9C=E2=94=80=E2=94=80 c++
+// =E2=94=82=C2=A0=C2=A0 =E2=94=94=E2=94=80=E2=94=80 ld.lld
+// =E2=94=9C=E2=94=80=E2=94=80 x86_64-macos-none
+// =E2=94=82=C2=A0=C2=A0 =E2=94=9C=E2=94=80=E2=94=80 ar
+// =E2=94=82=C2=A0=C2=A0 =E2=94=9C=E2=94=80=E2=94=80 c++
+// =E2=94=82=C2=A0=C2=A0 =E2=94=94=E2=94=80=E2=94=80 ld64.lld
+// ...
+// * ZIG_LIB_DIR controls the output of `zig c++ -MF -MD <...>`. Bazel uses
+// command to understand which input files were used to the compilation. If =
any
+// of the files are not in `external/<...>/`, Bazel will understand and
+// complain that the compiler is using undeclared directories on the host fi=
le
+// system. We do not declare prerequisites using absolute paths, because that
+// busts Bazel's remote cache.
+// * BAZEL_ZIG_CC_CACHE_PREFIX is configurable per toolchain instance, and
+// ZIG_GLOBAL_CACHE_DIR and ZIG_LOCAL_CACHE_DIR must be set to its value for
+// all `zig` invocations.
+//
+// Originally this was a Bash script, then a POSIX shell script, then two
+// scripts (one with pre-defined BAZEL_ZIG_CC_CACHE_PREFIX, one without). Th=
en
+// Windows came along with two PowerShell scripts (ports of the POSIX shell
+// scripts), which I kept breaking. Then Bazel 6 came with
+// `--experimental_use_hermetic_linux_sandbox`, which hermetizes the sandbox=
to
+// the extreme: the sandbox has nothing that is not declared. /bin/sh and its
+// dependencies (/lib/x86_64-linux-gnu/libc.so.6 on my system) are obviously
+// not declared. So one can either declare those dependencies, bundle a shell
+// to execute the wrapper, or port the shell logic to a cross-platform progr=
am
+// that compiles to a static binary. By a chance we happen to already ship a
+// toolchain of a language that could compile such program. And behold, the
+// program is below.
+
+const builtin =3D @import("builtin");
+const std =3D @import("std");
+const fs =3D std.fs;
+const mem =3D std.mem;
+const process =3D std.process;
+const ChildProcess =3D std.ChildProcess;
+const ArrayList =3D std.ArrayList;
+const ArrayListUnmanaged =3D std.ArrayListUnmanaged;
+const Allocator =3D std.mem.Allocator;
+const sep =3D fs.path.sep_str;
+
+const EXE =3D switch (builtin.target.os.tag) {
+ .windows =3D> ".exe",
+ else =3D> "",
+};
+
+const CACHE_DIR =3D "{BAZEL_ZIG_CC_CACHE_PREFIX}";
+
+const usage_cpp =3D
+ \\Usage: <...>/tools/<target-triple>/{[zig_tool]s}{[exe]s} <args>...
+ \\
+ \\Wraps the "zig" multi-call binary. It determines the target platform f=
rom
+ \\the directory where it was called. Then sets ZIG_LIB_DIR,
+ \\ZIG_GLOBAL_CACHE_DIR, ZIG_LOCAL_CACHE_DIR and then calls:
+ \\
+ \\ zig c++ -target <target-triple> <args>...
+;
+
+const usage_other =3D
+ \\Usage: <...>/tools/<target-triple>/{[zig_tool]s}{[exe]s} <args>...
+ \\
+ \\Wraps the "zig" multi-call binary. It sets ZIG_LIB_DIR,
+ \\ZIG_GLOBAL_CACHE_DIR, ZIG_LOCAL_CACHE_DIR, and then calls:
+ \\
+ \\ zig {[zig_tool]s} <args>...
+;
+
+const Action =3D enum {
+ early_ok,
+ early_err,
+ exec,
+};
+
+const ExecParams =3D struct {
+ args: ArrayListUnmanaged([]const u8),
+ env: process.EnvMap,
+};
+
+const ParseResults =3D union(Action) {
+ early_ok,
+ early_err: []const u8,
+ exec: ExecParams,
+};
+
+pub fn main() u8 {
+ var allocator =3D if (builtin.link_libc)
+ std.heap.c_allocator
+ else blk: {
+ var gpa =3D std.heap.GeneralPurposeAllocator(.{}){};
+ break :blk gpa.allocator();
+ };
+ var arena_allocator =3D std.heap.ArenaAllocator.init(allocator);
+ defer arena_allocator.deinit();
+ const arena =3D arena_allocator.allocator();
+
+ var argv_it =3D process.argsWithAllocator(arena) catch |err| {
+ std.debug.print("error parsing args: {s}\n", .{@errorName(err)});
+ return 1;
+ };
+
+ const action =3D parseArgs(arena, fs.cwd(), &argv_it) catch |err| {
+ std.debug.print("error: {s}\n", .{@errorName(err)});
+ return 1;
+ };
+
+ switch (action) {
+ .early_ok =3D> return 0,
+ .early_err =3D> |msg| {
+ std.io.getStdErr().writeAll(msg) catch {};
+ return 1;
+ },
+ .exec =3D> |params| {
+ if (builtin.os.tag =3D=3D .windows) {
+ return spawnWindows(arena, params);
+ } else {
+ return execUnix(arena, params);
+ }
+ },
+ }
+}
+
+fn spawnWindows(arena: Allocator, params: ExecParams) u8 {
+ var proc =3D ChildProcess.init(params.args.items, arena);
+ proc.env_map =3D &params.env;
+ const ret =3D proc.spawnAndWait() catch |err| {
+ std.debug.print(
+ "error spawning {s}: {s}\n",
+ .{ params.args.items[0], @errorName(err) },
+ );
+ return 1;
+ };
+
+ switch (ret) {
+ .Exited =3D> |code| return code,
+ else =3D> |other| {
+ std.debug.print("abnormal exit: {any}\n", .{other});
+ return 1;
+ },
+ }
+}
+
+fn execUnix(arena: Allocator, params: ExecParams) u8 {
+ const err =3D process.execve(arena, params.args.items, &params.env);
+ std.debug.print(
+ "error execing {s}: {s}\n",
+ .{ params.args.items[0], @errorName(err) },
+ );
+ return 1;
+}
+
+// argv_it is an object that has such method:
+// fn next(self: *Self) ?[]const u8
+// in non-testing code it is *process.ArgIterator.
+// Leaks memory: the name of the first argument is arena not by chance.
+fn parseArgs(
+ arena: Allocator,
+ cwd: fs.Dir,
+ argv_it: anytype,
+) error{OutOfMemory}!ParseResults {
+ const arg0 =3D argv_it.next() orelse
+ return fatal(arena, "error: argv[0] cannot be null", .{});
+
+ const zig_tool =3D blk: {
+ const b =3D fs.path.basename(arg0);
+ if (builtin.target.os.tag =3D=3D .windows and
+ std.ascii.eqlIgnoreCase(".exe", b[b.len - 4 ..]))
+ break :blk b[0 .. b.len - 4];
+
+ break :blk b;
+ };
+ const maybe_target =3D getTarget(arg0) catch |err| switch (err) {
+ error.BadParent =3D> {
+ const fmt_args =3D .{ .zig_tool =3D zig_tool, .exe =3D EXE };
+ if (mem.eql(u8, zig_tool, "c++")) {
+ return fatal(arena, usage_cpp, fmt_args);
+ } else return fatal(arena, usage_other, fmt_args);
+ },
+ else =3D> |e| return e,
+ };
+
+ const root =3D blk: {
+ var dir =3D cwd.openDir(
+ "external" ++ sep ++ "zig_sdk" ++ sep ++ "lib",
+ .{ .access_sub_paths =3D false, .no_follow =3D true },
+ );
+
+ if (dir) |*dir_exists| {
+ dir_exists.close();
+ break :blk "external" ++ sep ++ "zig_sdk";
+ } else |_| {}
+
+ // directory does not exist or there was an error opening it
+ const here =3D fs.path.dirname(arg0) orelse ".";
+ break :blk try fs.path.join(arena, &[_][]const u8{ here, "..", ".." =
});
+ };
+
+ const zig_lib_dir =3D try fs.path.join(arena, &[_][]const u8{ root, "lib=
" });
+ const zig_exe =3D try fs.path.join(
+ arena,
+ &[_][]const u8{ root, "zig" ++ EXE },
+ );
+
+ var env =3D process.getEnvMap(arena) catch |err| {
+ return fatal(
+ arena,
+ "error getting process environment: {s}",
+ .{@errorName(err)},
+ );
+ };
+ try env.put("ZIG_LIB_DIR", zig_lib_dir);
+ try env.put("ZIG_LOCAL_CACHE_DIR", CACHE_DIR);
+ try env.put("ZIG_GLOBAL_CACHE_DIR", CACHE_DIR);
+
+ // args is the path to the zig binary and args to it.
+ var args =3D ArrayListUnmanaged([]const u8){};
+ try args.appendSlice(arena, &[_][]const u8{ zig_exe, zig_tool });
+ if (maybe_target) |target|
+ try args.appendSlice(arena, &[_][]const u8{ "-target", target });
+
+ while (argv_it.next()) |arg|
+ try args.append(arena, arg);
+
+ if (mem.eql(u8, zig_tool, "c++") and shouldReturnEarly(args.items))
+ return .early_ok;
+
+ return ParseResults{
+ .exec =3D .{
+ .args =3D args,
+ .env =3D env,
+ },
+ };
+}
+
+fn fatal(
+ arena: Allocator,
+ comptime fmt: []const u8,
+ args: anytype,
+) error{OutOfMemory}!ParseResults {
+ const msg =3D try std.fmt.allocPrint(arena, fmt ++ "\n", args);
+ return ParseResults{ .early_err =3D msg };
+}
+
+// Golang probing for a particular linker flag causes many unneeded stubs to=
be
+// built, e.g. glibc, musl, libc++. The hackery can probably be deleted after
+// Go 1.20 is released. In particular,
+// https://go-review.googlesource.com/c/go/+/436884
+fn shouldReturnEarly(args: []const []const u8) bool {
+ const prelude =3D &[_][]const u8{
+ "-Wl,--no-gc-sections",
+ "-x",
+ "c",
+ "-",
+ "-o",
+ "/dev/null",
+ };
+ if (args.len < prelude.len)
+ return false;
+ for (prelude) |arg, i|
+ if (!mem.eql(u8, arg, args[args.len - prelude.len + i]))
+ return false;
+ return true;
+}
+
+fn getTarget(self_exe: []const u8) error{BadParent}!?[]const u8 {
+ const here =3D fs.path.dirname(self_exe) orelse return error.BadParent;
+ const triple =3D fs.path.basename(here);
+
+ // Validating the triple now will help users catch errors even if they
+ // don't yet need the target. yes yes the validation will miss things
+ // strings `is.it.x86_64?-stallinux,macos-`; we are trying to aid users
+ // that run things from the wrong directory, not trying to punish the on=
es
+ // having fun.
+ {
+ var it =3D mem.split(u8, triple, "-");
+ if (it.next()) |arch| {
+ if (mem.indexOf(u8, "aarch64,x86_64", arch) =3D=3D null)
+ return error.BadParent;
+ } else return error.BadParent;
+
+ if (it.next()) |got_os| {
+ if (mem.indexOf(u8, "linux,macos,windows", got_os) =3D=3D null)
+ return error.BadParent;
+ } else return error.BadParent;
+
+ // ABI triple is too much of a moving target
+ if (it.next() =3D=3D null) return error.BadParent;
+
+ // but the target needs to have 3 dashes.
+ if (it.next() !=3D null) return error.BadParent;
+ }
+
+ if (mem.eql(u8, "c++" ++ EXE, fs.path.basename(self_exe))) {
+ return triple;
+ } else return null;
+}
+
+const testing =3D std.testing;
+
+fn split(comptime str: []const u8) []const []const u8 {
+ var arr: [str.len][]const u8 =3D undefined;
+ var i: usize =3D 0;
+ var it =3D mem.split(u8, str, " ");
+ while (it.next()) |arg| : (i +=3D 1)
+ arr[i] =3D arg;
+ return arr[0..i];
+}
+
+test "launcher:shouldReturnEarly" {
+ const pos =3D .{
+ "-Wl,--no-gc-sections -x c - -o /dev/null",
+ "foo.c -o main -Wl,--no-gc-sections -x c - -o /dev/null",
+ };
+ const neg =3D .{
+ "cc -Wl,--no-gc-sections -x c - -o /dev/null x",
+ "-Wl,--no-gc-sections -x c - -o",
+ "incorrect-value -x c - -o /dev/null",
+ };
+
+ inline for (pos) |tt|
+ try testing.expect(shouldReturnEarly(split(tt)));
+
+ inline for (neg) |tt|
+ try testing.expect(!shouldReturnEarly(split(tt)));
+}
+
+pub const TestArgIterator =3D struct {
+ index: usize =3D 0,
+ argv: []const [:0]const u8,
+
+ pub fn next(self: *TestArgIterator) ?[:0]const u8 {
+ if (self.index =3D=3D self.argv.len) return null;
+
+ defer self.index +=3D 1;
+ return self.argv[self.index];
+ }
+
+ pub fn skip(self: *TestArgIterator) bool {
+ if (self.index =3D=3D self.len) return false;
+
+ self.index +=3D 1;
+ return true;
+ }
+};
+
+fn compareExec(
+ res: ParseResults,
+ want_args: []const [:0]const u8,
+ want_env_zig_lib_dir: []const u8,
+) !void {
+ try testing.expectEqual(want_args.len, res.exec.args.items.len);
+ for (want_args) |want_arg, i| {
+ try testing.expectEqualStrings(
+ want_arg,
+ res.exec.args.items[i],
+ );
+ }
+ try testing.expectEqualStrings(
+ want_env_zig_lib_dir,
+ res.exec.env.get("ZIG_LIB_DIR").?,
+ );
+}
+
+test "launcher:parseArgs" {
+ // not using testing.allocator, because parseArgs is designed to be used
+ // with an arena.
+ var gpa =3D std.heap.GeneralPurposeAllocator(.{}){};
+ var allocator =3D gpa.allocator();
+
+ const tests =3D [_]struct {
+ args: []const [:0]const u8,
+ precreate_dir: ?[]const u8 =3D null,
+ want_result: union(Action) {
+ early_ok,
+ early_err: []const u8,
+ exec: struct {
+ args: []const [:0]const u8,
+ env_zig_lib_dir: []const u8,
+ },
+ },
+ }{
+ .{
+ .args =3D &[_][:0]const u8{"ar" ++ EXE},
+ .want_result =3D .{
+ .early_err =3D std.fmt.comptimePrint(usage_other ++ "\n", .{
+ .zig_tool =3D "ar",
+ .exe =3D EXE,
+ }),
+ },
+ },
+ .{
+ .args =3D &[_][:0]const u8{"c++" ++ EXE},
+ .want_result =3D .{
+ .early_err =3D std.fmt.comptimePrint(usage_cpp ++ "\n", .{
+ .zig_tool =3D "c++",
+ .exe =3D EXE,
+ }),
+ },
+ },
+ .{
+ .args =3D &[_][:0]const u8{
+ "external" ++ sep ++ "zig_sdk" ++ "tools" ++ sep ++
+ "x86_64-linux-musl" ++ sep ++ "c++" ++ EXE,
+ "-Wl,--no-gc-sections",
+ "-x",
+ "c",
+ "-",
+ "-o",
+ "/dev/null",
+ },
+ .want_result =3D .early_ok,
+ },
+ .{
+ .args =3D &[_][:0]const u8{
+ "tools" ++ sep ++ "x86_64-linux-musl" ++ sep ++ "c++" ++ EXE,
+ "main.c",
+ "-o",
+ "/dev/null",
+ },
+ .want_result =3D .{
+ .exec =3D .{
+ .args =3D &[_][:0]const u8{
+ "tools" ++ sep ++ "x86_64-linux-musl" ++ sep ++
+ ".." ++ sep ++ ".." ++ sep ++ "zig" ++ EXE,
+ "c++",
+ "-target",
+ "x86_64-linux-musl",
+ "main.c",
+ "-o",
+ "/dev/null",
+ },
+ .env_zig_lib_dir =3D "tools" ++ sep ++ "x86_64-linux-mus=
l" ++
+ sep ++ ".." ++ sep ++ ".." ++ sep ++ "lib",
+ },
+ },
+ },
+ .{
+ .args =3D &[_][:0]const u8{
+ "tools" ++ sep ++ "x86_64-linux-musl" ++ sep ++ "ar" ++ EXE,
+ "-rcs",
+ "all.a",
+ "main.o",
+ "foo.o",
+ },
+ .want_result =3D .{
+ .exec =3D .{
+ .args =3D &[_][:0]const u8{
+ "tools" ++ sep ++ "x86_64-linux-musl" ++ sep ++ ".."=
++
+ sep ++ ".." ++ sep ++ "zig" ++ EXE,
+ "ar",
+ "-rcs",
+ "all.a",
+ "main.o",
+ "foo.o",
+ },
+ .env_zig_lib_dir =3D "tools" ++ sep ++ "x86_64-linux-mus=
l" ++
+ sep ++ ".." ++ sep ++ ".." ++ sep ++ "lib",
+ },
+ },
+ },
+ .{
+ .args =3D &[_][:0]const u8{
+ "external_zig_sdk" ++ sep ++ "tools" ++ sep ++
+ "x86_64-linux-gnu.2.28" ++ sep ++ "c++" ++ EXE,
+ "main.c",
+ "-o",
+ "/dev/null",
+ },
+ .precreate_dir =3D "external" ++ sep ++ "zig_sdk" ++ sep ++ "lib=
",
+ .want_result =3D .{
+ .exec =3D .{
+ .args =3D &[_][:0]const u8{
+ "external" ++ sep ++ "zig_sdk" ++ sep ++ "zig" ++ EX=
E,
+ "c++",
+ "-target",
+ "x86_64-linux-gnu.2.28",
+ "main.c",
+ "-o",
+ "/dev/null",
+ },
+ .env_zig_lib_dir =3D "external" ++ sep ++ "zig_sdk" ++
+ sep ++ "lib",
+ },
+ },
+ },
+ };
+
+ for (tests) |tt| {
+ var tmp =3D testing.tmpDir(.{});
+ defer tmp.cleanup();
+
+ if (tt.precreate_dir) |dir|
+ try tmp.dir.makePath(dir);
+
+ var res =3D try parseArgs(allocator, tmp.dir, &TestArgIterator{
+ .argv =3D tt.args,
+ });
+
+ switch (tt.want_result) {
+ .early_ok =3D> try testing.expectEqual(res, .early_ok),
+ .early_err =3D> |want_msg| try testing.expectEqualStrings(
+ want_msg,
+ res.early_err,
+ ),
+ .exec =3D> |want| {
+ try compareExec(res, want.args, want.env_zig_lib_dir);
+ },
+ }
+ }
+}
diff --git a/toolchain/private/defs.bzl b/toolchain/private/defs.bzl
index 9409f5e..635dde9 100644
--- a/toolchain/private/defs.bzl
+++ b/toolchain/private/defs.bzl
@@ -32,7 +32,7 @@ LIBCS =3D ["musl"] + ["gnu.{}".format(glibc) for glibc in _=
GLIBCS]
=20
def zig_tool_path(os):
if os =3D=3D "windows":
- return _ZIG_TOOL_PATH + ".bat"
+ return _ZIG_TOOL_PATH + ".exe"
else:
return _ZIG_TOOL_PATH
=20
--=20
2.34.5
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[zig launcher: replace shell wrappers with a binary][0] from [~motiejus][1]
[0]: https://lists.sr.ht/~motiejus/bazel-zig-cc/patches/37721
[1]: mailto:motiejus@jakstys.lt
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Subject: Re: [PATCH bazel-zig-cc 1/1] zig launcher: replace shell wrappers
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I ran into problems with missing shell utilities (dirname and sed)
when using bazel-zig-cc with rules_rust. rustc seems to unset PATH
when calling tools like the linker, which causes problems with the zig
tool wrapper scripts. I guess this patch would solve the issues that
I'm seeing?
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From: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Date: Fri, 30 Dec 2022 21:07:55 +0200
Message-ID: <CAFVMu-riAWd3yrzH3=Xq=beniKfXSaH6BeGSVPKT=JGeTFA7vA@mail.gmail.com>
Subject: Re: [PATCH bazel-zig-cc 1/1] zig launcher: replace shell wrappers
with a binary
To: Philippe Voinov <philippe@deepjudge.ai>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht, "~motiejus" <motiejus@git.sr.ht>
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On Fri, Dec 30, 2022 at 8:55 PM Philippe Voinov <philippe@deepjudge.ai> wrote:
>
> I ran into problems with missing shell utilities (dirname and sed)
> when using bazel-zig-cc with rules_rust. rustc seems to unset PATH
> when calling tools like the linker, which causes problems with the zig
> tool wrapper scripts. I guess this patch would solve the issues that
> I'm seeing?
Hi Philippe,
It has a high chance to work, but you never know until you try. Feel
free to test the patch yourself (or the remote branch
motiejus_launcher_zig[1]) and please report back.
I am hesitant to merge it as-is without Fabian's ack whether it works
on Windows though.
[1]: https://git.sr.ht/~motiejus/bazel-zig-cc/tree/motiejus_launcher_zig
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Subject: Re: [PATCH bazel-zig-cc 1/1] zig launcher: replace shell wrappers
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Hi Motiejus,
Apologies for the delay in responding, I was traveling over the
Christmas and new year break and just got back home.
I've tested your patch on Windows and there are currently two issues
with it, one is trivial to fix and the other one I'm not sure about:
First, cache_prefix in toolchain/defs.bzl needs to have its backslashes
double escaped: once for bazel, and once for zig itself, otherwise the
zig compiler will complain about invalid escape characters. So it should
be "C:\\\\Temp\\\\bazel-zig-cc"
Second, zig further fails to compile launcher.zig with the following error:
launcher.zig:70:73: error: expected ';' after declaration
    \\Usage: <...>/tools/<target-triple>/{[zig_tool]s}{[exe]s} <args>...
                                                                        ^~~~
launcher.zig:71:3: note: invalid byte: ' '
    \\
  ^
The reason for this is that Git on Windows inserts carriage return
characters before newlines when checking out local files so they show up
fine in Windows text editors where \r\n is the default for line breaks.
This then breaks the zig parser's support for multiline constants as
detailed in https://github.com/ziglang/zig/issues/9257 which is marked
as closed even though it doesn't look resolved to me at all. Converting
newlines is the default behavior for Git unless you explicitly disable
it by setting core.autocrlf in your Git config. While that would be a
workaround, I would find this an uncommon thing to do and an odd thing
to require of Windows users, which is something also pointed out in the
above issue.
I did confirm that either of the following two hacks to launcher.zig do
make your patch work on Windows:
1. Replace usage_cpp and usage_other by regular strings without
multiline constant syntax.
2. Setting core.autocrlf to false in Git and recloning the repository.
3. Running dos2unix on launcher.zig before compiling it.
None of these are ideal, so I'm not quite sure how to go about solving
this. What do you think?
Best,
Fabian
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From: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Date: Tue, 3 Jan 2023 00:34:13 +0200
Message-ID: <CAFVMu-q9QmVd+rTxHMqX==8E_-fZ=7x8Sq6St_q9YXcJz451Xg@mail.gmail.com>
Subject: Re: [PATCH bazel-zig-cc 1/1] zig launcher: replace shell wrappers
with a binary
To: Fabian Hahn <fabian@hahn.graphics>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht, "~motiejus" <motiejus@git.sr.ht>
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On Mon, Jan 2, 2023 at 11:53 PM Fabian Hahn <fabian@hahn.graphics> wrote:
>
> Hi Motiejus,
>
> Apologies for the delay in responding, I was traveling over the
> Christmas and new year break and just got back home.
Happy new year! :)
> I've tested your patch on Windows and there are currently two issues
> with it, one is trivial to fix and the other one I'm not sure about:
>
> First, cache_prefix in toolchain/defs.bzl needs to <...>
> be "C:\\\\Temp\\\\bazel-zig-cc"
Fixed, thanks.
> Second, zig further fails to compile launcher.zig with the following error:
>
> launcher.zig:70:73: error: expected ';' after declaration
>
> \\Usage: <...>/tools/<target-triple>/{[zig_tool]s}{[exe]s} <args>...
>
<...>
> 1. Replace usage_cpp and usage_other by regular strings without
> multiline constant syntax.
This.
> None of these are ideal, so I'm not quite sure how to go about solving
> this. What do you think?
I am OK with using ugly strings with ++ until
https://github.com/ziglang/zig/issues/9257 is fixed one way or
another. Can you do a final test on
https://git.sr.ht/~motiejus/bazel-zig-cc/commit/motiejus_launcher_zig
before I merge it?
Thanks,
Motiejus
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From: fabian@hahn.graphics
To: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht, ~motiejus <motiejus@git.sr.ht>
Subject: Re: [PATCH bazel-zig-cc 1/1] zig launcher: replace shell wrappers
with a binary
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On 2023-01-02 22:34, Motiejus Jakštys wrote:
> I am OK with using ugly strings with ++ until
> https://github.com/ziglang/zig/issues/9257 is fixed one way or
> another. Can you do a final test on
> https://git.sr.ht/~motiejus/bazel-zig-cc/commit/motiejus_launcher_zig
> before I merge it?
Sounds good, thanks for making the change. I've tested your latest
branch and Windows host support is working fine :)
Best,
Fabian
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Subject: Re: bazel-zig-cc v1.0.0-rc4: call for testers
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I tested this with our repository but it fails to compile Rust code
due to the following error:
```
error: /home/danielp/.cache/bazel/_bazel_danielp/f060a56172a8e8c557483bbe1399c8d9/execroot/monorepo/bazel-out/k8-opt-exec-2B5CBBC6/bin/external/cargo__pin-project-internal-1.0.12/libpin_project_internal-932791180.so:
cannot allocate memory in static TLS block
--> external/cargo__axum-0.5.9/src/routing/method_routing.rs:20:5
|
20 | use tower_http::map_response_body::MapResponseBodyLayer;
| ^^^^^^^^^^
```
I tested this using the HEAD of the Zig toolchain and the default Zig
version using the latest release of rules_rust.
I'm not sure if this is an issue with Zig, Rust, rules_rust or the Zig
toolchain and don't have the capacity to do
a deep dive at the moment.
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From: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Date: Mon, 9 Jan 2023 14:10:20 +0200
Message-ID: <CAFVMu-o1w-6WF=WOKUX=Te4SXLE5FDgMrUZB1HEzxjQPhB3OFA@mail.gmail.com>
Subject: Re: bazel-zig-cc v1.0.0-rc4: call for testers
To: =?UTF-8?B?RGFuw61lbCBQdXJraMO6cw==?= <danielp@avilabs.is>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht
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On Mon, Jan 9, 2023 at 12:59 PM Dan=C3=ADel Purkh=C3=BAs <danielp@avilabs.i=
s> wrote:
>
> I tested this with our repository but it fails to compile Rust code
> due to the following error:
>
> ```
> error: /home/danielp/.cache/bazel/_bazel_danielp/f060a56172a8e8c557483bbe=
1399c8d9/execroot/monorepo/bazel-out/k8-opt-exec-2B5CBBC6/bin/external/carg=
o__pin-project-internal-1.0.12/libpin_project_internal-932791180.so:
> cannot allocate memory in static TLS block
> --> external/cargo__axum-0.5.9/src/routing/method_routing.rs:20:5
> |
> 20 | use tower_http::map_response_body::MapResponseBodyLayer;
> | ^^^^^^^^^^
>
> ```
>
> I tested this using the HEAD of the Zig toolchain and the default Zig
> version using the latest release of rules_rust.
> I'm not sure if this is an issue with Zig, Rust, rules_rust or the Zig
> toolchain and don't have the capacity to do
> a deep dive at the moment.
Hi Dan=C3=ADel,
Having spent a few minutes searching for a similar issue,
https://github.com/rust-cross/cargo-zigbuild/issues/27#issuecomment-1094177=
369
may be a good start. I am not planning to work on adding Rust-specific
support to bazel-zig-cc, but will accept patches that make support
*better* for Rust.
Motiejus
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From: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Date: Tue, 24 Jan 2023 11:12:03 +0200
Message-ID: <CAFVMu-rYbf_jDTT4p=CS2KV1asdS5Ovo5AyuCwgv2AXr8OOP0g@mail.gmail.com>
Subject: bazel-zig-cc v1.0.0
To: ~motiejus/bazel-zig-cc@lists.sr.ht
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Hi all,
I just released bazel-zig-cc v1.0. It has been compiling Uber's Go
Monorepo since Jan 4 of this year, so we feel it's good enough for v1.
Changes since v1.0.0-rc4:
- add `res_search` workaround for ziglang/zig#9485[1], equivalent to `fcntl=
64`.
- replace the shell-based wrapper scripts with one written in zig.
This enables --experimental_use_hermetic_linux_sandbox, leaving only
/proc/self/exe required outside of the toolchain (I will probably fix
even this eventually).
- Apple M1 improvements by Jeremy Volkman.
This is probably the last release of bazel-zig-cc in sourcehut. In
very short order bazel-zig-cc will become an official Uber's project
and move to github. I will send a separate announcement when that
happens (and maybe a blog post somewhere).
Thanks everyone involved in working with us towards v1.0; here are our
contributors:
Motiejus Jak=C5=A1tys
Ken Micklas
Laurynas Lubys
Fabian Hahn
Jeremy Volkman
Adam Bouhenguel
Luis Holanda
Mantas Jonaitis
Piotr Sikora
Motiejus
[1]: https://github.com/ziglang/zig/issues/9485
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From: Simon Mavi Stewart <simon.m.stewart@gmail.com>
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Date: Tue, 31 Jan 2023 18:30:21 +0000
Subject: Setting sysroots
Message-Id: <B83A9681-7EBB-4230-8543-160AC09A0436@gmail.com>
To: ~motiejus/bazel-zig-cc@lists.sr.ht
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Hi,
Is there any recommended way of passing a sysroot to use to the zig-cc toolc=
hains that are created? And also to pass additional linker flags?
I'm trying to use bazel-zig-cc to compile code using Rust, and some of the d=
ependencies need to link against `libiconv`. For macOS compiles, I know that=
I need to supply my own sysroot, and that needs to contain not just the lib=
raries, but also the frameworks that are linked against. Being able to speci=
fy additional linker flags would help with that a lot.
Kind regards,
Simon
Sent from my iPhone=
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From: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Date: Tue, 31 Jan 2023 22:41:57 -0800
Message-ID: <CAFVMu-pH1ZJxQzHBUaBHFvQuXLSDrZxF6BJgpsLY2gaf0THUfQ@mail.gmail.com>
Subject: Re: Setting sysroots
To: Simon Mavi Stewart <simon.m.stewart@gmail.com>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht
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On Tue, Jan 31, 2023 at 10:30 AM Simon Mavi Stewart
<simon.m.stewart@gmail.com> wrote:
>
> Hi,
>
> Is there any recommended way of passing a sysroot to use to the zig-cc to=
olchains that are created? And also to pass additional linker flags?
Hi,
Yes. See this snippet in the README:
version =3D "<...>",
url_formats =3D [
"https://example.org/zig/zig-{host_platform}-{version}.{_ext}",
],
host_platform_sha256 =3D { ... },
Does that explain it?
> I'm trying to use bazel-zig-cc to compile code using Rust, and some of th=
e dependencies need to link against `libiconv`. For macOS compiles, I know =
that I need to supply my own sysroot, and that needs to contain not just th=
e libraries, but also the frameworks that are linked against. Being able to=
specify additional linker flags would help with that a lot.
Linking to libraries outside the sandbox is highly, highly
discouraged. Normally you would build libiconv with bazel (cc_library
et al) and statically (recommended; you can also link dynamically, but
that has its own caveats) link to it in your application.
As far as *.tbd files of MacOS are concerned (do I correctly
understand that this is what you mean by sysroot?), this is currently
unsupported, and, honestly, I have very little idea how to implement
it. But I will review/accept patches that do it.
Motiejus
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From: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Date: Wed, 1 Mar 2023 09:01:10 +0200
Message-ID: <CAFVMu-okEg37xUzG+DDB7dAmqDjXyzoZbCVxtBjuHvN36uEF-g@mail.gmail.com>
Subject: Re: bazel-zig-cc v1.0.0
To: Jeremy Volkman <jeremy@jvolkman.com>
Cc: ~motiejus/bazel-zig-cc@lists.sr.ht
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On Wed, Mar 1, 2023 at 1:31=E2=80=AFAM Jeremy Volkman <jeremy@jvolkman.com>=
wrote:
>
> Hi Motiejus,
> Has that move to GitHub happened yet? Should we still send patches to thi=
s list?
>
Hi Jeremy,
We are still working on it, there have been some bumps on the way.
Worry not, it will be announced. Until that happens, please keep
contributing to sourcehut/this mailing list.
Motiejus
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From: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Date: Mon, 6 Mar 2023 11:41:40 +0200
Message-ID: <CAFVMu-qj835_+rWH5h01M4GA-YeoXKELPUnebzP0U8wVhRggxA@mail.gmail.com>
Subject: bazel-zig-cc v1.0.1: relicense to Apache v2
To: ~motiejus/bazel-zig-cc@lists.sr.ht
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Hi folks,
I just cut bazel-zig-cc v1.0.1:
- partially relicensed[1] to Apache v2.
- download zig sdk from mirror.bazel.build by default instead of
dl.jakstys.lt. Thanks for no longer using the server from my closet --
turns out Google is generous enough to mirror such files[3]. You can
now safely omit the "version", "url_formats" and
"host_platform_sha256" -- we intend to keep upgrading bazel-zig-cc to
a reasonalby new Zig version, forever mirrored to mirror.bazel.build.
- upgraded Zig to 0.11.0-dev.1796+c9e02d3e6. This Zig fails the linker
step on unsupported linker flags[4], which will make
autoconf/automake/cmake invocations with zig cc more robust (it used
to emit a linker warning if it found an unsupported linker flag,
sometimes with unexpected consequences).
We created a #zig channel in Bazel Slack. Bazel says the invitation
link[2] will be active for 14 days. Just find us on #zig in
bazel.slack.com if you want to chat.
All following contributions to bazel-zig-cc will be accepted only
under Apache 2.0 license; this was the last required step before
moving the repository to github/uber. The move took longer than I
though it would, but rest assured, it is happening. Before the move,
let's keep using this mailing list and Slack for comms. After the
move, the this mailing list will be replaced by github issues/PRs,
Slack will stay.
Motiejus
[1]: https://git.sr.ht/~motiejus/bazel-zig-cc/commit/dfdb1f26805c1ccf6d1113276d40c8ce4c1fa17e
[2]: https://join.slack.com/share/enQtNDkwMTIxOTk0NTk1NS01OGUyNjM4ODQ2MDI1NjdiNmYyOTMxMGNiOWRiMDU2YmY0MmYwNWU1ZjI5NzNmMjMzZGExNDJkZGE0NzI5N2I3
[3]: https://github.com/bazelbuild/bazel/issues/17635
[4]: https://github.com/ziglang/zig/pull/11906
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=0A=
Hello,=0A=
=0A=
I was checking if bazel-zig-cc produces reproducible go binaries if used as=
a compiler for cgo.=0A=
As a test, I compiled the same binary on the same commit on two different s=
ystems (Ubuntu, Fedora) and in two different paths at different times.=0A=
=0A=
The binaries are not reproducible. At least some differences seem to be com=
ing from bazel-zig-cc:=0A=
=0A=
The paths to pthread.h and signal.h on my build system are embedded in the =
resulting binary. See below for an instance of this behavior.=0A=
Do you think this can be prevented to make the resulting binary more hermet=
ic / reproducible?=0A=
=0A=
- [15809be] /root/.cache/bazel/_bazel_root/378578e4f433132b2cb209458a9b5=
6bc/sandbox/processwrapper-sandbox/44/execroot/__main__/external/zig_sdk/to=
ols/x86_64-linux-gnu.2.34/../../lib/libc/include/generic-glibc/pthread.h=0A=
=81 - [1580a8e] gcc_libinit.c=0A=
=81 - [1580a9c] pthread_create failed: %s=0A=
=81 - [1580ab6] gcc_linux_amd64.c=0A=
=81 - [1580ac8] /root/.cache/bazel/_bazel_root/378578e4f433132b2cb209458a=
9b56bc/sandbox/processwrapper-sandbox/44/execroot/__main__/external/zig_sdk=
/tools/x86_64-linux-gnu.2.34/../../lib/libc/include/generic-glibc/pthread.h=
=0A=
=81 - [1580b98] /root/.cache/bazel/_bazel_root/378578e4f433132b2cb209458a=
9b56bc/sandbox/processwrapper-sandbox/44/execroot/__main__/external/zig_sdk=
/tools/x86_64-linux-gnu.2.34/../../lib/libc/include/generic-glibc/signal.h=
=0A=
=81 - [1580c67] malloc failed: %s=0A=
=81 - [1580c79] bad stack bounds: lo=3D%p hi=3D%p\n=0A=
=81 - [1580c98] pthread_create failed: %s=0A=
=81 - [1580cb2] gcc_util.c=0A=
=81 - [1580cbd] runtime/cgo: out of memory in thread_start\n=0A=
=81 + [15809be] gcc_libinit.c=0A=
=81 + [15809cc] /home/malte/.cache/bazel/_bazel_malte/bb1175a64d2f0f71785=
aea697a0484ea/sandbox/linux-sandbox/224/execroot/__main__/external/zig_sdk/=
tools/x86_64-linux-gnu.2.34/../../lib/libc/include/generic-glibc/pthread.h=
=0A=
=81 + [1580a9b] pthread_create failed: %s=0A=
=81 + [1580ab5] gcc_linux_amd64.c=0A=
=81 + [1580ac7] malloc failed: %s=0A=
=81 + [1580ad9] /home/malte/.cache/bazel/_bazel_malte/bb1175a64d2f0f71785=
aea697a0484ea/sandbox/linux-sandbox/224/execroot/__main__/external/zig_sdk/=
tools/x86_64-linux-gnu.2.34/../../lib/libc/include/generic-glibc/pthread.h=
=0A=
=81 + [1580ba8] bad stack bounds: lo=3D%p hi=3D%p\n=0A=
=81 + [1580bc7] /home/malte/.cache/bazel/_bazel_malte/bb1175a64d2f0f71785=
aea697a0484ea/sandbox/linux-sandbox/224/execroot/__main__/external/zig_sdk/=
tools/x86_64-linux-gnu.2.34/../../lib/libc/include/generic-glibc/signal.h=
=0A=
=81 + [1580c95] pthread_create failed: %s=0A=
=81 + [1580caf] gcc_util.c=0A=
=81 + [1580cba] runtime/cgo: out of memory in thread_start\n=0A=
=0A=
Attached is the full output of diffoscope.=0A=
=0A=
Kind regards,=0A=
Malte Poll=0A=
=0A=
=0A=
--_002_AM6PR02MB44704BD42717C2D472D0CEB6B5B79AM6PR02MB4470eurp_
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From: =?UTF-8?Q?Motiejus_Jak=C5=A1tys?= <motiejus@jakstys.lt>
Date: Wed, 8 Mar 2023 06:55:43 +0200
Message-ID: <CAFVMu-puXsmnArzMSXw7=TX1ph6BfNTBySxvgxXOgYvMjj_ZwQ@mail.gmail.com>
Subject: Re: bazel-zig-cc embeds bazel cache path in go binary
To: Malte Poll <mp@edgeless.systems>
Cc: "~motiejus/bazel-zig-cc@lists.sr.ht" <~motiejus/bazel-zig-cc@lists.sr.ht>
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On Tue, Mar 7, 2023 at 6:15=E2=80=AFPM Malte Poll <mp@edgeless.systems> wro=
te:
>
>
> Hello,
>
> I was checking if bazel-zig-cc produces reproducible go binaries if used =
as a compiler for cgo.
> As a test, I compiled the same binary on the same commit on two different=
systems (Ubuntu, Fedora) and in two different paths at different times.
>
> The binaries are not reproducible. At least some differences seem to be c=
oming from bazel-zig-cc:
>
> The paths to pthread.h and signal.h on my build system are embedded in th=
e resulting binary. See below for an instance of this behavior.
> Do you think this can be prevented to make the resulting binary more herm=
etic / reproducible?
Hi Malte,
Thanks for the report. I am 99% confident the problem is with Go,
because Go compiles CGo files 2 ways:
1. in the Bazel sandbox.
2. in /tmp/work-<...>, outside the sandbox.
> - [15809be] /root/.cache/bazel/_bazel_root/378578e4f433132b2cb209458a9=
b56bc/sandbox/processwrapper-sandbox/44/execroot/__main__/external/zig_sdk/=
tools/x86_64-linux-gnu.2.34/../../lib/libc/include/generic-glibc/pthread.h
When we invoke "zig c++", the ZIG_LIB_DIR needs to be passed to Zig.
It needs to be a relative directory, but it can't always do that. This
is how it's determined:
https://git.sr.ht/~motiejus/bazel-zig-cc/tree/v1.0.1/item/toolchain/launche=
r.zig#L190-215
Here are the relevant lines with comments. First, determine the "root"
of the zig sdk:
const root =3D blk: {
var dir =3D cwd.openDir(
"external" ++ sep ++ "zig_sdk" ++ sep ++ "lib",
.{ .access_sub_paths =3D false, .no_follow =3D true },
);
if (dir) |*dir_exists| {
dir_exists.close();
break :blk "external" ++ sep ++ "zig_sdk";
} else |_| {}
If "external/zig_sdk/lib" exists, then "root" is exactly that. If it
does not exist:
// directory does not exist or there was an error opening it
const here =3D fs.path.dirname(arg0) orelse ".";
break :blk try fs.path.join(arena, &[_][]const u8{ here, "..", ".."=
});
};
... then the zig sdk root will be the full path to the executed file
(e.g. /root/.cache/bazel/_bazel_root/378578e4f433132b2cb209458a9b56bc/sandb=
ox/processwrapper-sandbox/44/execroot/__main__/external/zig_sdk/tools/x86_6=
4-linux-gnu.2.34/c++),
it's dirname, plus "../../". Then append the "lib" to that path:
const zig_lib_dir =3D try fs.path.join(arena, &[_][]const u8{ root, "li=
b" });
<...>
And then use that path for ZIG_LIB_DIR:
try env.put("ZIG_LIB_DIR", zig_lib_dir);
So following the logic ZIG_LIB_DIR in your example will be
/root/.cache/bazel/_bazel_root/378578e4f433132b2cb209458a9b56bc/sandbox/pro=
cesswrapper-sandbox/44/execroot/__main__/external/zig_sdk/tools/x86_64-linu=
x-gnu.2.34/../../
; and this is how Zig will embed that path.
Other than changing how Go builds it's CGO binaries, I don't see a
good way to work around this. At the point Go is invoking the external
linker we are already in $WORK, so we don't have control over that
working directory.
The horrible part is, of course, changing the working directory at the
bottom leaves of the compilation chain. The good part about this
design is that Bazel does not see non-hermeticity (at this point Bazel
lost control). So as far as Bazel is concerned, it's the same
dependency hash. The bad part, is, of course, non-reproducible
binaries.
> <...>
> Attached is the full output of diffoscope.
Thanks, TIL.
Are the paths still there if you strip the binaries (are they
stripped? hard to tell, because your diffoscope output does not
include all sections)? IIRC filenames are only present in binaries
compiled with debug info. But I am not sure if `strip` removes strings
from rodata. Please let us know.
Motiejus
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From: Malte Poll <mp@edgeless.systems>
To: "~motiejus/bazel-zig-cc@lists.sr.ht" <~motiejus/bazel-zig-cc@lists.sr.ht>
CC: =?Windows-1252?Q?Motiejus_Jak=9Atys?= <motiejus@jakstys.lt>
Subject: Re: bazel-zig-cc embeds bazel cache path in go binary
Thread-Topic: bazel-zig-cc embeds bazel cache path in go binary
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Date: Wed, 8 Mar 2023 11:58:12 +0000
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So, I chased this issue a bit more.=0A=
Simply setting the bazel flag "--strip=3Dalways" does not seem to be suffic=
ient. However, when I set "--compilation_mode=3Dopt", the strings disappear=
.=0A=
I'll report findings if I get to the bottom of this, although I agree that =
this may not be something that can be fixed in the toolchain. For now I can=
live with the compilation mode.=0A=
=0A=
Thanks=0A=
Malte=