From 5f7eb88ae0990f89ec3a4bf697ec03aafee1a9a8 Mon Sep 17 00:00:00 2001
From: Cacodemon345 <wahil1976@outlook.com>
Date: Sun, 14 Mar 2021 22:36:20 +0600
Subject: [PATCH] Load libOpenGL.so.1 if libGL.so.1 is not found

---
 src/video/SDL_egl.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/video/SDL_egl.c b/src/video/SDL_egl.c
index 099547b01..fa2c841dc 100644
--- a/src/video/SDL_egl.c
+++ b/src/video/SDL_egl.c
@@ -73,6 +73,7 @@
 #define DEFAULT_OGL_ES "libGLESv1_CM.dylib"     //???
 
 #elif defined(__OpenBSD__)
+/* OpenBSD */
 #define DEFAULT_OGL "libGL.so"
 #define DEFAULT_EGL "libEGL.so"
 #define DEFAULT_OGL_ES2 "libGLESv2.so"
@@ -80,9 +81,10 @@
 #define DEFAULT_OGL_ES "libGLESv1_CM.so"
 
 #else
-/* Desktop Linux */
+/* Desktop Linux/Unix-like */
 #define DEFAULT_OGL "libGL.so.1"
 #define DEFAULT_EGL "libEGL.so.1"
+#define ALT_OGL "libOpenGL.so.1"
 #define DEFAULT_OGL_ES2 "libGLESv2.so.2"
 #define DEFAULT_OGL_ES_PVR "libGLES_CM.so.1"
 #define DEFAULT_OGL_ES "libGLESv1_CM.so.1"
@@ -374,6 +376,12 @@ SDL_EGL_LoadLibraryOnly(_THIS, const char *egl_path)
         else {
             path = DEFAULT_OGL;
             egl_dll_handle = SDL_LoadObject(path);
+#ifdef ALT_OGL
+            if (egl_dll_handle == NULL) {
+                path = ALT_OGL;
+                egl_dll_handle = SDL_LoadObject(path);
+            }
+#endif
         }
 #endif        
     }