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Motiejus Jakštys 2021-08-06 14:30:25 +03:00
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@ -2,27 +2,27 @@
# Bazel zig cc toolchain for Go # Bazel zig cc toolchain for Go
This is a prototype zig-cc toolchain that can cross-compile cgo programs to these os/archs: This is an early stage zig-cc toolchain that can cross-compile cgo programs to these os/archs:
- amd64-linux-gnu.2.19 - amd64-linux-gnu.2.19
- amd64-linux-musl - amd64-linux-musl
- arm64-linux-gnu.2.19 - arm64-linux-gnu.2.28
- arm64-linux-musl - arm64-linux-musl
- amd64-macos - amd64-macos
- arm64-macos - arm64-macos
Don't use this yet, see [Known Issues](#known-issues)). # Usage
Add this to your `WORKSPACE`: TBD.
# Testing # Testing
## linux cgo + glibc 2.19 ## linux cgo + glibc 2.19
Glibc toolchain is suffixed with `-gnu`:
``` ```
$ bazel run --platforms @zig_sdk//:x86_64-linux-gnu //test:gognu $ bazel build --platforms @io_bazel_rules_go//go/toolchain:linux_amd64_cgo //test:hello
$ file bazel-bin/test/gognu_/gognu $ file bazel-out/k8-fastbuild-ST-d17813c235ce/bin/test/hello_/hello
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 bazel-out/k8-fastbuild-ST-d17813c235ce/bin/test/hello_/hello: 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
``` ```
## linux cgo + musl ## linux cgo + musl
@ -41,7 +41,7 @@ hello, world
## macos cgo ## macos cgo
``` ```
$ bazel build --platforms @zig_sdk//:x86_64-macos-gnu //test:gognu $ bazel build --platforms @io_bazel_rules_go//go/toolchain:darwin_amd64_cgo //test:gognu
... ...
$ file bazel-bin/test/gognu_/gognu $ file bazel-bin/test/gognu_/gognu
bazel-bin/test/gognu_/gognu: Mach-O 64-bit x86_64 executable, flags:<NOUNDEFS|DYLDLINK|TWOLEVEL|PIE> bazel-bin/test/gognu_/gognu: Mach-O 64-bit x86_64 executable, flags:<NOUNDEFS|DYLDLINK|TWOLEVEL|PIE>
@ -60,6 +60,7 @@ how CI does it.
# Known Issues # Known Issues
- [ziglang/zig #9485 glibc 2.27 or older: fcntl64 not found, but zig's glibc headers refer it] (https://github.com/ziglang/zig/issues/9485)
- [ziglang/zig #9431 FileNotFound when compiling macos](https://github.com/ziglang/zig/issues/9431) - [ziglang/zig #9431 FileNotFound when compiling macos](https://github.com/ziglang/zig/issues/9431)
- [rules/go #2894 Per-arch_target linker flags](https://github.com/bazelbuild/rules_go/issues/2894) - [rules/go #2894 Per-arch_target linker flags](https://github.com/bazelbuild/rules_go/issues/2894)