From b9529e83619f1e2b725ea86508b546d72e072a0c Mon Sep 17 00:00:00 2001
From: StapleButter <thetotalworm@gmail.com>
Date: Sat, 1 Jun 2019 00:27:54 +0200
Subject: [PATCH] Linux: fix uiGLGetProcAddress()

---
 src/CMakeLists.txt            |  2 +-
 src/libui_sdl/libui/unix/gl.c | 13 +++++++++----
 2 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index d096c028..a1110f1f 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -29,5 +29,5 @@ add_library(core STATIC
 if (WIN32)
 	target_link_libraries(core ole32 comctl32 ws2_32 opengl32)
 else()
-	target_link_libraries(core GL)
+	target_link_libraries(core GL EGL)
 endif()
diff --git a/src/libui_sdl/libui/unix/gl.c b/src/libui_sdl/libui/unix/gl.c
index 6965969d..4a180ef0 100644
--- a/src/libui_sdl/libui/unix/gl.c
+++ b/src/libui_sdl/libui/unix/gl.c
@@ -2,8 +2,8 @@
 #include "uipriv_unix.h"
 
 #include <GL/gl.h>
-
-void* glXGetProcAddressARB(const GLubyte* name);
+#include <GL/glx.h>
+#include <EGL/egl.h>
 
 extern GThread* gtkthread;
 extern GMutex glmutex;
@@ -220,10 +220,15 @@ void *uiGLGetProcAddress(const char* proc)
 {
 	// TODO: consider using epoxy or something funny
 	
-	void* ptr = dlsym(NULL /* RTLD_DEFAULT */, proc);
+	void* ptr;
+
+	ptr = glXGetProcAddressARB((const GLubyte*)proc);
 	if (ptr) return ptr;
 	
-	ptr = glXGetProcAddressARB((const GLubyte*)proc);
+	ptr = eglGetProcAddress(proc);
+	if (ptr) return ptr;
+	
+	ptr = dlsym(NULL /* RTLD_DEFAULT */, proc);
 	if (ptr) return ptr;
 	
 	return NULL;