add macos support

+ buildifier

.build.yml

@@ -34,7 +34,15 @@ tasks:
            --platforms @zig_sdk//:aarch64-linux-musl //test:gomusl
       file $(./getpath @zig_sdk//:aarch64-linux-musl //test:gomusl) | \
         tee /dev/stderr | grep -q "statically linked"
-  #- test_macos-gnu: |
-  #    cd bazel-zig-cc; ../bazel build --toolchain_resolution_debug=true \
-  #      --platforms @zig_sdk//:x86_64-macos-gnu \
-  #      //test:gognu
+  - test_x86_64-macos-gnu: |
+      cd bazel-zig-cc; ../bazel build --toolchain_resolution_debug=true \
+        --platforms @zig_sdk//:x86_64-macos-gnu \
+        //test:gomacos
+      file $(./getpath @zig_sdk//:x86_64-macos-gnu //test:gomacos) | \
+        tee /dev/stderr | grep -q "Mach-O 64-bit arm64 executable"
+  - test_aarch64-macos-gnu: |
+      cd bazel-zig-cc; ../bazel build --toolchain_resolution_debug=true \
+        --platforms @zig_sdk//:aarch64-macos-gnu \
+        //test:gomacos
+      file $(./getpath @zig_sdk//:aarch64-macos-gnu //test:gomacos) | \
+        tee /dev/stderr | grep -q "Mach-O 64-bit x86_64 executable"

test/BUILD

@@ -11,6 +11,19 @@ go_library(
 go_binary(
     name = "gognu",
     embed = [":go_lib"],
+    target_compatible_with = ["@platforms//os:linux"],
+    visibility = ["//visibility:public"],
+)
+
+go_binary(
+    name = "gomacos",
+    embed = [":go_lib"],
+    gc_linkopts = [
+        "-s",
+        "-w",
+        "-buildmode=pie",
+    ],
+    target_compatible_with = ["@platforms//os:macos"],
     visibility = ["//visibility:public"],
 )
 

toolchain/defs.bzl

@@ -4,7 +4,6 @@ load(":zig_toolchain.bzl", "zig_cc_toolchain_config")
 DEFAULT_TOOL_PATHS = {
     "ar": "ar",
     "gcc": "c++",  # https://github.com/bazelbuild/bazel/issues/4644
-
     "cpp": "/usr/bin/false",
     "gcov": "/usr/bin/false",
     "nm": "/usr/bin/false",
@@ -94,11 +93,10 @@ def toolchain_repositories():
             "linux-x86_64": "3e5b4fa3b346e2eae6829dd7ef90e9a0f6e6297cee62017e3d0f0f7c9edfa21e",
             "macos-x86_64": "9b5e3fefa6ae0b1ab26821323df0641f818e72bffc343e194dc60829005d3055",
         },
-
         host_platform_include_root = {
             "macos-x86_64": "lib/zig/",
             "linux-x86_64": "lib/",
-        }
+        },
     )
 
 def register_all_toolchains():
@@ -242,7 +240,7 @@ def zig_build_macro(absolute_path, zig_include_root):
         zig_cc_toolchain_config(
             name = target + "_cc_toolchain_config",
             target = target,
-            target_suffix = getattr(target_config, 'target_suffix', ''),
+            target_suffix = getattr(target_config, "target_suffix", ""),
             tool_paths = absolute_tool_paths,
             cxx_builtin_include_directories = cxx_builtin_include_directories,
             copts = target_config.copts,
@@ -274,7 +272,7 @@ def zig_build_macro(absolute_path, zig_include_root):
             toolchains = {
                 target_config.bazel_target_cpu: ":%s_cc_toolchain" % target,
             },
-            tags = ["manual"]
+            tags = ["manual"],
         )
 
         native.toolchain(