X-Git-Url: http://git.hungrycats.org/cgi-bin/gitweb.cgi?p=xscreensaver;a=blobdiff_plain;f=OSX%2FXScreenSaverGLView.m;h=265654a1e9b95c54e62b2aa83a91f38f9241f6a3;hp=8d17eb64065f38298c2d1bf13204c6cb9370fb6b;hb=488f2fa8fbdbc77e91a70da2962d73af49e6cace;hpb=c8c6deae79b408cffbc88043c766b3bc12cf0f13

diff --git a/OSX/XScreenSaverGLView.m b/OSX/XScreenSaverGLView.m
index 8d17eb64..265654a1 100644
--- a/OSX/XScreenSaverGLView.m
+++ b/OSX/XScreenSaverGLView.m
@@ -156,8 +156,10 @@ init_GL (ModeInfo *mi)
   // Enable multi-threading, if possible.  This runs most OpenGL commands
   // and GPU management on a second CPU.
   {
+#   ifndef  kCGLCEMPEngine
+#    define kCGLCEMPEngine 313  // Added in MacOS 10.4.8 + XCode 2.4.
+#   endif
     CGLContextObj cctx = CGLGetCurrentContext();
-#   define kCGLCEMPEngine 313  // #### new in MacOS 10.4.8 + XCode 2.4
     CGLError err = CGLEnable (cctx, kCGLCEMPEngine);
     if (err != kCGLNoError) {
       NSLog (@"enabling multi-threaded OpenGL failed: %d", err);