From e05d92a17db7105c352fce001619f5fea0ed540e Mon Sep 17 00:00:00 2001
From: Sam Lantinga <slouken@libsdl.org>
Date: Sun, 5 Apr 2020 09:01:33 -0700
Subject: [PATCH] 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 | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/video/x11/SDL_x11opengl.c b/src/video/x11/SDL_x11opengl.c
index 8747ff2db..cf7993bf7 100644
--- a/src/video/x11/SDL_x11opengl.c
+++ b/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"