Bug 687320 - On OpenBSD, libGL.so.1 doesn't exist - r=bjacob

Opening libGL.so will work regardless of the version, which changes over time.

gfx/thebes/GLContextProviderGLX.cpp

@@ -102,7 +102,11 @@ GLXLibrary::EnsureInitialized()
         // see e.g. bug 608526: it is intrinsically interesting to know whether we have dynamically linked to libGL.so.1
         // because at least the NVIDIA implementation requires an executable stack, which causes mprotect calls,
         // which trigger glibc bug http://sourceware.org/bugzilla/show_bug.cgi?id=12225
+#ifdef __OpenBSD__
+        const char *libGLfilename = "libGL.so";
+#else
         const char *libGLfilename = "libGL.so.1";
+#endif
         ScopedGfxFeatureReporter reporter(libGLfilename);
         mOGLLibrary = PR_LoadLibrary(libGLfilename);
         if (!mOGLLibrary) {

toolkit/xre/glxtest.cpp

@@ -111,7 +111,11 @@ x_error_handler(Display *, XErrorEvent *ev)
 static void glxtest()
 {
   ///// Open libGL and load needed symbols /////
+#ifdef __OpenBSD__
+  void *libgl = dlopen("libGL.so", RTLD_LAZY);
+#else
   void *libgl = dlopen("libGL.so.1", RTLD_LAZY);
+#endif
   if (!libgl)
     fatal_error("Unable to load libGL.so.1");