get xcode sdk

hook/build.dart

@@ -1,6 +1,7 @@
 import "dart:io";
 import "package:hooks/hooks.dart";
 import "package:code_assets/code_assets.dart";
+import "package:nexus/helpers/extensions/get_xcode_sdk.dart";
 
 Future<void> main(List<String> args) => build(args, (input, output) async {
   if (!input.config.buildCodeAssets) return;
@@ -16,6 +17,7 @@ Future<void> main(List<String> args) => build(args, (input, output) async {
       break;
     case OS.macOS:
       libFileName = "libgomuks.dylib";
+      env = {"SDKROOT": await getXCodeSDK()};
       break;
     case OS.windows:
       libFileName = "libgomuks.dll";

lib/helpers/extensions/get_xcode_sdk.dart

@@ -0,0 +1,11 @@
+import "dart:io";
+
+Future<String> getXCodeSDK() async {
+  final result = await Process.run("xcrun", ["--show-sdk-path"]);
+
+  if (result.exitCode != 0) {
+    throw Exception("Failed to get XCode SDK\n${result.stderr}");
+  }
+
+  return result.stdout;
+}

scripts/generate.dart

@@ -1,6 +1,7 @@
 import "dart:io";
 import "package:ffigen/ffigen.dart";
 import "package:path/path.dart";
+import "package:nexus/helpers/extensions/get_xcode_sdk.dart";
 
 void main(List<String> args) async {
   final repoDir = Directory.fromUri(Platform.script.resolve("../gomuks"));
@@ -14,7 +15,10 @@ void main(List<String> args) async {
     ),
     headers: Headers(
       entryPoints: [File(join(repoDir.path, "pkg", "ffi", "gomuksffi.h")).uri],
-      compilerOptions: ["--no-warnings"],
+      compilerOptions: [
+        "--no-warnings",
+        if (Platform.isMacOS) "${await getXCodeSDK()}/usr/include",
+      ],
     ),
     functions: Functions.includeAll,
   ).generate(