Fixed bug 5075 - Don't assume a GL library version number on NetBSD.

Nia Alarie

If you install X as part of NetBSD, the GL library is libGL.so.3, but if you install the GL library later as a package, it's libGL.so.1.

src/video/x11/SDL_x11opengl.c

@@ -32,8 +32,12 @@
 #include "SDL_loadso.h"
 #include "SDL_x11opengles.h"
 
-#if defined(__IRIX__)
-/* IRIX doesn't have a GL library versioning system */
+#if defined(__IRIX__) || defined(__NetBSD__)
+/*
+ * IRIX doesn't have a GL library versioning system.
+ * NetBSD has different GL library versions depending on how the library was
+ * installed (package vs. xsrc).
+ */
 #define DEFAULT_OPENGL  "libGL.so"
 #elif defined(__MACOSX__)
 #define DEFAULT_OPENGL  "/opt/X11/lib/libGL.1.dylib"