From 4a3b3ba1a9a14798ff8fcaee53de587e32556ad1 Mon Sep 17 00:00:00 2001
From: Andreas Beckmann <anbe@debian.org>
Date: Thu, 11 Jun 2020 20:11:23 +0100
Subject: [PATCH] set __GLVND_DISALLOW_PATCHING=1 before loading glvnd
 libraries

Gbp-Pq: Name glvnd.patch
---
 libglfork.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libglfork.cpp b/libglfork.cpp
index 03f514f..270918e 100644
--- a/libglfork.cpp
+++ b/libglfork.cpp
@@ -165,6 +165,9 @@ struct ContextsInfo: public std::map<GLXContext, ContextInfo> {
 struct EarlyInitializer {
   EarlyInitializer(const char **adpy_strp, const char **libgla_strp)
   {
+    // Allow multiple glvnd libGL.so.1 instances to be loaded into a process
+    // and OpenGL calls dispatched to them depending on context.
+    setenv("__GLVND_DISALLOW_PATCHING", "1", 0);
 #ifdef BUMBLEBEE_SOCKET
     // Signal the Bumblebee daemon to bring up secondary X
     int sock = socket(PF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0);
-- 
2.30.2