CI: separate tools job from the build job

fix `error: 'resolv.h' file not found`

.github/workflows/ci.yml

@@ -36,13 +36,31 @@ jobs:
       - name: Run `build`
         run: zig build ${{ matrix.build-options }} -Doptimize=${{ matrix.optimize }} --summary all
 
-      # Test allyourcodebase/lmdb#3
+  # CI test for allyourcodebase/lmdb#3
+  tools:
+    strategy:
+      fail-fast: false
+      matrix:
+        zig-version: ["master", "0.13.0"]
+        os: [ubuntu-latest]
+
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+        with:
+          submodules: false
+
+      - name: Set up Zig
+        uses: mlugg/setup-zig@v1
+        with:
+          version: ${{ matrix.zig-version }}
+          use-cache: false
+
       - name: Run `build tools on macos`
         run: zig build tools -Dtarget=x86_64-macos-none --summary all
 
-      - name: Run `build tools on windows`
-        run: zig build tools -Dtarget=x86_64-windows-gnu --summary all
-
   test:
     strategy:
       fail-fast: false

build.zig

@@ -20,11 +20,12 @@ pub fn build(b: *Build) void {
     const strip = b.option(bool, "strip", "Strip debug information") orelse false;
     const lto = b.option(bool, "lto", "Enable link time optimization") orelse false;
 
-    const is_macos = builtin.os.tag == .macos or target.result.os.tag == .macos;
-    const is_windows = builtin.os.tag == .windows or target.result.os.tag == .windows;
-
+    const is_macos = builtin.os.tag == .macos;
+    const need_resolve_h = is_macos or target.result.os.tag == .macos;
+    const is_windows = builtin.os.tag == .windows;
+
     // writing WritingLibFiles in zld isn't implemented on windows
-    // and zld is the only linker suppored on macos
+    // and zld is the only linker supported on macos
     const use_lld = if (is_macos) false else if (is_windows) true else switch (optimize) {
         .Debug => false,
         else => true,
@@ -66,7 +67,7 @@ pub fn build(b: *Build) void {
     });
     liblmdb.addIncludePath(lmdb_upstream.path(lmdb_root));
     liblmdb.root_module.addCMacro("_XOPEN_SOURCE", "600");
-    if (is_macos) {
+    if (need_resolve_h) {
         liblmdb.root_module.addCMacro("_DARWIN_C_SOURCE", "");
     }
 
@@ -112,7 +113,7 @@ pub fn build(b: *Build) void {
         });
         tool.addIncludePath(lmdb_upstream.path(lmdb_root));
         tool.root_module.addCMacro("_XOPEN_SOURCE", "600");
-        if (is_macos) {
+        if (need_resolve_h) {
             tool.root_module.addCMacro("_DARWIN_C_SOURCE", "");
         }
         tool.linkLibrary(liblmdb);