Fix some issues with Meson build scripts. (Regression from commit ca566eb.)

desmume/src/frontend/interface/meson.build

@@ -15,11 +15,18 @@ dep_sdl = dependency('sdl2')
 dep_pcap = dependency('pcap')
 dep_zlib = dependency('zlib')
 dep_threads = dependency('threads')
-dep_gl = dependency('gl', required: false)
 dep_openal = dependency('openal', required: get_option('openal'))
 dep_alsa = dependency('alsa', required: false)
 dep_soundtouch = dependency('soundtouch', required: false)
 
+if host_machine.system() == 'darwin'
+  dep_gl = dependency('appleframeworks', modules: 'OpenGL')
+  dep_gles = dependency('appleframeworks', modules: 'OpenGLES')
+else
+  dep_gl = dependency('gl', required: false)
+  dep_gles = dependency('glesv2', required: false)
+endif
+
 if get_option('wifi')
   add_global_arguments('-DEXPERIMENTAL_WIFI_COMM', language: ['c', 'cpp'])
 endif
@@ -173,14 +180,29 @@ if have_jit
   ]
 endif
 
-if host_machine.system() == 'darwin'
-  dependencies += dependency('appleframeworks', modules: 'OpenGL')
-elif dep_gl.found()
-  dependencies += dep_gl
-  libdesmume_src += [
-    '../../OGLRender.cpp',
-    '../../OGLRender_3_2.cpp',
-  ]
+if get_option('opengles')
+  if dep_gles.found()
+    add_global_arguments('-DENABLE_OPENGL_ES', language: ['c', 'cpp'])
+    dependencies += dep_gles
+    libdesmume_src += [
+      '../../OGLRender.cpp',
+      '../../OGLRender_3_2.cpp',
+      '../../OGLRender_ES3.cpp',
+    ]
+  else
+    message('Cannot build with OpenGL ES -- library not found.')
+  endif
+elif get_option('opengl')
+  if dep_gl.found()
+    add_global_arguments('-DENABLE_OPENGL_STANDARD', language: ['c', 'cpp'])
+    dependencies += dep_gl
+    libdesmume_src += [
+      '../../OGLRender.cpp',
+      '../../OGLRender_3_2.cpp',
+    ]
+  else
+    message('Cannot build with OpenGL -- library not found.')
+  endif
 endif
 
 if dep_openal.found()

desmume/src/frontend/interface/meson_options.txt

@@ -1,3 +1,13 @@
+option('opengl',
+  type: 'boolean',
+  value: false,
+  description: 'Build for OpenGL',
+)
+option('opengles',
+  type: 'boolean',
+  value: false,
+  description: 'Build for OpenGL ES',
+)
 option('openal',
   type: 'boolean',
   value: false,

desmume/src/frontend/posix/gtk/meson.build

@@ -25,20 +25,14 @@ desmume_src = [
 ]
 
 if get_option('glx') and dep_glx.found()
-  add_global_arguments('-DENABLE_GLX', language: ['c', 'cpp'])
-  dependencies += dep_glx
   desmume_src += [
     '../shared/glx_3Demu.cpp',
   ]
 elif get_option('osmesa') and dep_osmesa.found()
-  add_global_arguments('-DENABLE_OSMESA', language: ['c', 'cpp'])
-  dependencies += dep_osmesa
   desmume_src += [
     '../shared/osmesa_3Demu.cpp',
   ]
 elif get_option('egl') and dep_egl.found()
-  add_global_arguments('-DENABLE_EGL', language: ['c', 'cpp'])
-  dependencies += dep_egl
   desmume_src += [
     '../shared/egl_3Demu.cpp',
   ]

desmume/src/frontend/posix/gtk2/meson.build

@@ -18,20 +18,14 @@ desmume_src = [
 ]
 
 if get_option('glx') and dep_glx.found()
-  add_global_arguments('-DENABLE_GLX', language: ['c', 'cpp'])
-  dependencies += dep_glx
   desmume_src += [
     '../shared/glx_3Demu.cpp',
   ]
 elif get_option('osmesa') and dep_osmesa.found()
-  add_global_arguments('-DENABLE_OSMESA', language: ['c', 'cpp'])
-  dependencies += dep_osmesa
   desmume_src += [
     '../shared/osmesa_3Demu.cpp',
   ]
 elif get_option('egl') and dep_egl.found()
-  add_global_arguments('-DENABLE_EGL', language: ['c', 'cpp'])
-  dependencies += dep_egl
   desmume_src += [
     '../shared/egl_3Demu.cpp',
   ]