Build the opengl module on OS X (gl provider not done yet)

configure.ac

@@ -2564,12 +2564,13 @@ if test "${enable_xvideo}" != "no" &&
 fi
 
 dnl
-dnl  GLX module
-dnl  (enabled by default except on win32)
+dnl  OpenGL module
+dnl  (enabled by default except on beos)
 dnl
 AC_ARG_ENABLE(opengl,
   [  --enable-opengl            OpenGL support (default enabled)])
 if test "${enable_opengl}" != "no" && test "${SYS}" != "beos"; then
+  if test "${SYS}" != "darwin"; then
     AC_CHECK_HEADERS(GL/gl.h, [
       VLC_ADD_PLUGINS([opengl])
       if test "${SYS}" != "mingw32"; then
@@ -2578,6 +2579,11 @@ if test "${enable_opengl}" != "no" && test "${SYS}" != "beos"; then
         VLC_ADD_LDFLAGS([opengl],[-lopengl32])
       fi
     ])
+  else
+    dnl OS X special case (no GL/gl.h but OpenGL/gl.h)
+    VLC_ADD_PLUGINS([opengl])
+    VLC_ADD_LDFLAGS([opengl],[-framework OpenGL])
+  fi
 fi
 
 dnl

modules/video_output/opengl.c

@@ -32,7 +32,12 @@
 #include <vlc/vlc.h>
 #include <vlc/vout.h>
 
+#ifndef SYS_DARWIN
 #include <GL/gl.h>
+#else
+/* Mac OS X < 10.3 does not have GL/gl.h */
+#include <OpenGL/gl.h>
+#endif
 
 /* RV16 */
 #ifndef GL_UNSIGNED_SHORT_5_6_5