Enable MacOS CI

.github/workflows/ci.yml

@@ -9,7 +9,7 @@ on:
     - cron: "0 0 * * *"
 
 jobs:
-  build_and_test:
+  linux-gnu:
     runs-on: ubuntu-latest
     timeout-minutes: 15
     steps:
@@ -20,4 +20,16 @@ jobs:
         with:
           version: master
       - name: Build and test
-        run: sh ci/github_ubuntu_runner.sh
+        run: sh ci/linux_gnu_runner.sh
+  macos:
+    runs-on: macos-latest
+    timeout-minutes: 15
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Set up Zig
+        uses: davidgm94/setup-zig@foo
+        with:
+          version: master
+      - name: Build and test
+        run: sh ci/macos_runner.sh

build.zig

@@ -30,7 +30,7 @@ pub fn build(b: *std.Build) !void {
     const static = b.option(bool, "static", "This option enables the compiler to be built statically") orelse switch (@import("builtin").os.tag) {
         else => use_debug,
         .windows => true,
-        .macos => true,
+        // .macos => true,
     };
     const compiler_options = b.addOptions();
     compiler_options.addOption(bool, "print_stack_trace", print_stack_trace);
@@ -481,7 +481,7 @@ pub fn build(b: *std.Build) !void {
             .macos => {
                 compiler.linkLibCpp();
 
-                if (discover_brew_prefix(b, "llvm")) |llvm_prefix| {
+                if (discover_brew_prefix(b, "llvm@17")) |llvm_prefix| {
                     const llvm_include_path = try std.mem.concat(b.allocator, u8, &.{ llvm_prefix, "/include" });
                     const llvm_lib_path = try std.mem.concat(b.allocator, u8, &.{ llvm_prefix, "/lib" });
                     compiler.addIncludePath(.{ .cwd_relative = llvm_include_path });

build/test_runner.zig

@@ -523,7 +523,12 @@ fn run_test_suite(allocator: Allocator, args: struct {
         };
 
         switch (@import("builtin").os.tag) {
-            .macos => {},
+            .macos => runCmakeTests(allocator, .{
+                .dir_path = "test/cc_macos",
+                .compiler_path = args.compiler_path,
+            }) catch {
+                errors = true;
+            },
             .windows => {},
             .linux => switch (@import("builtin").abi) {
                 .gnu => runCmakeTests(allocator, .{

ci/macos_runner.sh

@@ -0,0 +1,5 @@
+#!/bin/sh
+set -ex
+brew update
+brew install llvm@17 ninja
+zig build test -Dthird_party_ci

test/cc_macos/c_asm/.gitignore

@@ -0,0 +1,2 @@
+*.o
+build/

test/cc_macos/c_asm/CMakeLists.txt

@@ -0,0 +1,3 @@
+cmake_minimum_required(VERSION 3.15)
+project(c_asm C ASM)
+add_executable(c_asm main.c assembly.S)

test/cc_macos/c_asm/assembly.S

@@ -0,0 +1,4 @@
+.global _foo
+_foo:
+    mov w0, #42
+    ret

test/cc_macos/c_asm/main.c

@@ -0,0 +1,7 @@
+extern int foo();
+#include <assert.h>
+int main()
+{
+    assert(foo() == 42);
+    return 0;
+}