interface: Fix macOS build (#485)

* Compile macOS interface with clang

* Fix OpenGL dependency on macOS

.github/workflows/build_interface.yml

@@ -44,14 +44,14 @@ jobs:
           cd desmume/src/frontend/interface/
           meson build
         env:
-          CC: gcc-10
-          CXX: g++-10
+          CC: clang
+          CXX: clang++
 
       - name: Build - ninja
         run: ninja -C desmume/src/frontend/interface/build
         env:
-          CC: gcc-10
-          CXX: g++-10
+          CC: clang
+          CXX: clang++
 
       - name: Upload artificat
         uses: actions/upload-artifact@v2

desmume/src/frontend/interface/meson.build

@@ -40,6 +40,11 @@ else
   have_jit = false
 endif
 
+# Clang refuses to compile with this warning
+if meson.get_compiler('cpp').get_id() == 'clang'
+  add_global_arguments('-Wno-c++11-narrowing', language: ['c', 'cpp'])
+endif
+
 includes = include_directories(
   '../../../src',
   '../../../src/libretro-common/include',
@@ -168,7 +173,9 @@ if have_jit
   ]
 endif
 
-if dep_gl.found()
+if host_machine.system() == 'darwin'
+  dependencies += dependency('appleframeworks', modules: 'OpenGL')
+elif dep_gl.found()
   dependencies += dep_gl
   libdesmume_src += [
     '../../OGLRender.cpp',

desmume/src/frontend/posix/shared/mic_openal.cpp

@@ -18,8 +18,13 @@
 
 #ifndef WIN32
 
+#ifdef __APPLE__
+  #include <OpenAL/al.h>
+  #include <OpenAL/alc.h>
+#else
   #include <AL/al.h>
   #include <AL/alc.h>
+#endif
 
 #include "types.h"
 #include "mic.h"