Mac OS X: Serach public frameworks first, then system frameworks.

CHANGELOG.md

@@ -1,3 +1,7 @@
+2.7.0.10
+--------
+* Mac OS X: Search public frameworks first, then system frameworks.
+
 2.7.0.9
 --------
 * The GLUT package compiles without any additional library/framework now.

GLUT.cabal

@@ -1,5 +1,5 @@
 name: GLUT
-version: 2.7.0.9
+version: 2.7.0.10
 synopsis: A binding for the OpenGL Utility Toolkit
 description:
   A Haskell binding for the OpenGL Utility Toolkit, a window system independent

cbits/HsGLUT.c

@@ -48,12 +48,6 @@ hs_GLUT_getProcAddress(const char *name)
 #include <stdlib.h>
 #include <dlfcn.h>
 
-#ifdef __APPLE__
-#define FILENAME "/System/Library/Frameworks/GLUT.framework/GLUT"
-#else
-#define FILENAME "libglut.so"
-#endif
-
 void*
 hs_GLUT_getProcAddress(const char *name)
 {
@@ -62,7 +56,18 @@ hs_GLUT_getProcAddress(const char *name)
 
   if (firstTime) {
     firstTime = 0;
-    handle = dlopen(FILENAME, RTLD_LAZY | RTLD_GLOBAL);
+
+#ifdef __APPLE__
+    /* Try public framework path first. */
+    handle = dlopen("/Library/Frameworks/GLUT.framework/GLUT", RTLD_LAZY | RTLD_GLOBAL);
+
+    /* If the public path failed, try the system framework path. */
+    if (!handle) {
+      handle = dlopen("/System/Library/Frameworks/GLUT.framework/GLUT", RTLD_LAZY | RTLD_GLOBAL);
+    }
+#else
+    handle = dlopen("libglut.so", RTLD_LAZY | RTLD_GLOBAL);
+#endif
   }
 
   return handle ? dlsym(handle, name) : NULL;