69 lines
1.9 KiB
Markdown
69 lines
1.9 KiB
Markdown
# Bazel zig cc toolchain for Go
|
|
|
|
This is a prototype zig-cc toolchain that can compile cgo programs with these c
|
|
libraries:
|
|
|
|
- glibc 2.19
|
|
- musl
|
|
|
|
glibc 2.19 is the default. That means, glibc 2.19 toolchain is registered with
|
|
these basic constraints:
|
|
|
|
```
|
|
[
|
|
"@platforms//os:linux",
|
|
"@platforms//cpu:x86_64",
|
|
]
|
|
```
|
|
|
|
# Testing
|
|
|
|
## linux cgo + glibc 2.19
|
|
|
|
Using the default toolchain:
|
|
|
|
```
|
|
$ bazel build --toolchain_resolution_debug=true //test:gognu
|
|
...
|
|
$ ../bazel-bin/test/gognu_/gognu
|
|
hello, world
|
|
$ file ../bazel-bin/test/gognu_/gognu
|
|
../bazel-bin/test/gognu_/gognu: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 2.0.0, Go BuildID=redacted, with debug_info, not stripped
|
|
```
|
|
|
|
Explicitly the toolchain explicitly `-gnu`:
|
|
```
|
|
$ bazel run --platforms @com_github_ziglang_zig//:platform_x86_64-linux-gnu //test:gognu
|
|
```
|
|
|
|
## linux cgo + musl
|
|
|
|
```
|
|
$ bazel build --platforms @com_github_ziglang_zig//:platform_x86_64-linux-musl //test:gomusl
|
|
...
|
|
$ file ../bazel-out/k8-fastbuild-ST-d17813c235ce/bin/test/gomusl_/gomusl
|
|
../bazel-out/k8-fastbuild-ST-d17813c235ce/bin/test/gomusl_/gomusl: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), statically linked, Go BuildID=redacted, with debug_info, not stripped
|
|
$ ../bazel-out/k8-fastbuild-ST-d17813c235ce/bin/test/gomusl_/gomusl
|
|
hello, world
|
|
```
|
|
|
|
## macos cgo + gnu
|
|
|
|
Does not work?
|
|
|
|
```
|
|
$ bazel build --platforms @com_github_ziglang_zig//:platform_x86_64-macos-musl //test:gognu
|
|
...
|
|
```
|
|
|
|
## Transient docker environment
|
|
|
|
```
|
|
$ docker run -ti --rm -v $(pwd):/x -w /x debian:buster-slim
|
|
# apt update && apt install curl ca-certificates -y && curl -L https://github.com/bazelbuild/bazelisk/releases/download/v1.7.5/bazelisk-linux-amd64 > /usr/local/bin/bazel && chmod +x /usr/local/bin/bazel
|
|
# export CC=/usr/bin/false
|
|
```
|
|
|
|
And run the `bazel build` commands above. Take a look at `.build.yml` and see
|
|
how CI does it.
|