Merge pull request #1273 from mitchellh/macos-sdk

build: use Xcode to find macOS SDK

build.zig

@@ -444,8 +444,8 @@ pub fn build(b: *std.Build) !void {
         b.installFile("images/icons/icon_256x256@2x@2x.png", "share/icons/hicolor/256x256@2/apps/com.mitchellh.ghostty.png");
     }
 
-    // On Mac we can build the embedding library.
+    // On Mac we can build the embedding library. This only handles the macOS lib.
-    if (builtin.target.isDarwin() and target.result.isDarwin()) {
+    if (builtin.target.isDarwin() and target.result.os.tag == .macos) {
         const static_lib_aarch64 = lib: {
             const lib = b.addStaticLibrary(.{
                 .name = "ghostty",
@@ -792,7 +792,7 @@ fn addDeps(
     // We always require the system SDK so that our system headers are available.
     // This makes things like `os/log.h` available for cross-compiling.
     if (step.rootModuleTarget().isDarwin()) {
-        try @import("apple_sdk").addPaths(b, step);
+        try @import("apple_sdk").addPaths(b, &step.root_module);
     }
 
     // We always need the Zig packages

nix/zigCacheHash.nix

@@ -1,3 +1,3 @@
 # This file is auto-generated! check build-support/check-zig-cache-hash.sh for
 # more details.
-"sha256-iRXzPgzOkt+TTcqPCRQubP3dN6lS+Wvn17l+0I/pDGg="
+"sha256-1qlnSOyr2C9DtUdf+4QRNrBr4vUM1nVnv/mVUXxE5fA="

pkg/apple-sdk/build.zig

@@ -7,12 +7,49 @@ pub fn build(b: *std.Build) !void {
     _ = optimize;
 }
 
-pub fn addPaths(b: *std.Build, step: *std.Build.Step.Compile) !void {
+/// Add the SDK framework, include, and library paths to the given module.
-    _ = b;
+/// The module target is used to determine the SDK to use so it must have
-    @import("macos_sdk").addPaths(step);
+/// a resolved target.
+pub fn addPaths(b: *std.Build, m: *std.Build.Module) !void {
+    // The active SDK we want to use
+    const sdk = try SDK.fromTarget(m.resolved_target.?.result);
+
+    // Get the path to our active Xcode installation. If this fails then
+    // the zig build will fail. We store this in a struct variable so its
+    // static and only calculated once per build.
+    const Path = struct {
+        var value: ?[]const u8 = null;
+    };
+    const path = Path.value orelse path: {
+        const path = std.mem.trim(u8, b.run(&.{ "xcode-select", "--print-path" }), " \r\n");
+        Path.value = path;
+        break :path path;
+    };
+
+    // Base path
+    const base = b.fmt("{s}/Platforms/{s}.platform/Developer/SDKs/{s}{s}.sdk", .{
+        path,
+        sdk.platform,
+        sdk.platform,
+        sdk.version,
+    });
+
+    m.addSystemFrameworkPath(.{ .cwd_relative = b.pathJoin(&.{ base, "/System/Library/Frameworks" }) });
+    m.addSystemIncludePath(.{ .cwd_relative = b.pathJoin(&.{ base, "/usr/include" }) });
+    m.addLibraryPath(.{ .cwd_relative = b.pathJoin(&.{ base, "/usr/lib" }) });
 }
 
-pub fn addPathsModule(b: *std.Build, m: *std.Build.Module) !void {
+const SDK = struct {
-    _ = b;
+    platform: []const u8,
-    @import("macos_sdk").addPathsModule(m);
+    version: []const u8,
-}
+
+    pub fn fromTarget(target: std.Target) !SDK {
+        return switch (target.os.tag) {
+            .macos => .{ .platform = "MacOSX", .version = "14" },
+            else => {
+                std.log.err("unsupported os={}", .{target.os.tag});
+                return error.UnsupportedOS;
+            },
+        };
+    }
+};

pkg/apple-sdk/build.zig.zon

@@ -1,10 +1,5 @@
 .{
     .name = "apple-sdk",
     .version = "0.1.0",
-    .dependencies = .{
+    .dependencies = .{},
-        .macos_sdk = .{
-            .url = "https://github.com/mitchellh/zig-build-macos-sdk/archive/ee70f27c08680307fa35ada92e6b2c36e0ff84c6.tar.gz",
-            .hash = "1220b415f529f1c04ed876c2b481e9f8119d353d4e3d4d7c8607ee302d2142e13eca",
-        },
-    },
 }

pkg/cimgui/build.zig

@@ -5,7 +5,11 @@ pub fn build(b: *std.Build) !void {
     const target = b.standardTargetOptions(.{});
     const optimize = b.standardOptimizeOption(.{});
 
-    const module = b.addModule("cimgui", .{ .root_source_file = .{ .path = "main.zig" } });
+    const module = b.addModule("cimgui", .{
+        .root_source_file = .{ .path = "main.zig" },
+        .target = target,
+        .optimize = optimize,
+    });
 
     const imgui = b.dependency("imgui", .{});
     const freetype = b.dependency("freetype", .{
@@ -60,8 +64,8 @@ pub fn build(b: *std.Build) !void {
 
     if (target.result.isDarwin()) {
         if (!target.query.isNative()) {
-            try @import("apple_sdk").addPaths(b, lib);
+            try @import("apple_sdk").addPaths(b, &lib.root_module);
-            try @import("apple_sdk").addPathsModule(b, module);
+            try @import("apple_sdk").addPaths(b, module);
         }
         lib.addCSourceFile(.{
             .file = imgui.path("backends/imgui_impl_metal.mm"),

pkg/harfbuzz/build.zig

@@ -18,6 +18,8 @@ pub fn build(b: *std.Build) !void {
 
     const module = b.addModule("harfbuzz", .{
         .root_source_file = .{ .path = "main.zig" },
+        .target = target,
+        .optimize = optimize,
         .imports = &.{
             .{ .name = "freetype", .module = freetype.module("freetype") },
             .{ .name = "macos", .module = macos.module("macos") },
@@ -59,10 +61,10 @@ pub fn build(b: *std.Build) !void {
         "-DHAVE_FT_DONE_MM_VAR=1",
         "-DHAVE_FT_GET_TRANSFORM=1",
     });
-    if (coretext_enabled) {
+    if (coretext_enabled and target.result.isDarwin()) {
         try flags.appendSlice(&.{"-DHAVE_CORETEXT=1"});
-        try apple_sdk.addPaths(b, lib);
+        try apple_sdk.addPaths(b, &lib.root_module);
-        try apple_sdk.addPathsModule(b, module);
+        try apple_sdk.addPaths(b, module);
         lib.linkFramework("ApplicationServices");
         module.linkFramework("ApplicationServices", .{});
     }

pkg/macos/build.zig

@@ -6,7 +6,11 @@ pub fn build(b: *std.Build) !void {
     const target = b.standardTargetOptions(.{});
     const optimize = b.standardOptimizeOption(.{});
 
-    const module = b.addModule("macos", .{ .root_source_file = .{ .path = "main.zig" } });
+    const module = b.addModule("macos", .{
+        .root_source_file = .{ .path = "main.zig" },
+        .target = target,
+        .optimize = optimize,
+    });
 
     const lib = b.addStaticLibrary(.{
         .name = "macos",
@@ -36,11 +40,11 @@ pub fn build(b: *std.Build) !void {
         module.linkFramework("CoreGraphics", .{});
         module.linkFramework("CoreText", .{});
         module.linkFramework("CoreVideo", .{});
-    }
 
-    if (!target.query.isNative()) {
+        if (!target.query.isNative()) {
-        try apple_sdk.addPaths(b, lib);
+            try apple_sdk.addPaths(b, &lib.root_module);
-        try apple_sdk.addPathsModule(b, module);
+            try apple_sdk.addPaths(b, module);
+        }
     }
     b.installArtifact(lib);