From: Jimi Huotari <chiitoo@gentoo.org>
Date: Sun, 9 Feb 2020 05:23:55 +0200
Subject: deps/glad: Fix build with GCC-10

GCC-10 defaults to '-fno-common' [1], which triggers issues with
defining global variables multiple times.  To fix the build, use
'extern' to turn the first definition of 'gladGetProcAddressPtr'
into a declaration.

1. https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85678

Closes https://github.com/obsproject/obs-studio/issues/2828
---
 deps/glad/src/glad_glx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/deps/glad/src/glad_glx.c b/deps/glad/src/glad_glx.c
index 7c55b9f..58086f1 100644
--- a/deps/glad/src/glad_glx.c
+++ b/deps/glad/src/glad_glx.c
@@ -35,7 +35,7 @@ static void* libGL;
 
 #ifndef __APPLE__
 typedef void* (APIENTRYP PFNGLXGETPROCADDRESSPROC_PRIVATE)(const char*);
-PFNGLXGETPROCADDRESSPROC_PRIVATE gladGetProcAddressPtr;
+extern PFNGLXGETPROCADDRESSPROC_PRIVATE gladGetProcAddressPtr;
 #endif
 
 static