patch-ac (from mrg@NetBSD.org):

Look for libGL.so, not any particular libGL.so.<X>, on NetBSD. (the comment inline explains why)
libsdl-org · Oct 16, 2009 · 807cef0 · 807cef0
1 parent dc820ad
commit 807cef0
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/src/video/x11/SDL_x11gl.c b/src/video/x11/SDL_x11gl.c
@@ -35,6 +35,9 @@
 #define DEFAULT_OPENGL	"libGL.so.3"
 #elif defined(__OpenBSD__)
 #define DEFAULT_OPENGL	"libGL.so.4.0"
+#elif defined(__NetBSD__)
+/* pkgsrc is .1, base system is .2 */
+#define DEFAULT_OPENGL	"libGL.so"
 #else
 #define DEFAULT_OPENGL	"libGL.so.1"
 #endif