From 1a6f3c56ea6e7bf9928fc99469f8f5da4578f035 Mon Sep 17 00:00:00 2001
From: wm4 <wm4@nowhere>
Date: Wed, 23 Dec 2015 17:59:35 +0100
Subject: vo_opengl: fall back to gcc thread local storage

gcc 4.8 does not support C11 thread local storage. This is a bit
annoying, so add a hack to use the gcc specific __thread extension if
C11 TLS is not available.

(This is used for the extremely silly mpv-internal way hwdec modules
access some platform specific handles. Disabling it simply made
hwdec_vaegl.c always fail initialization.)

Fixes #2631.
---
 video/out/opengl/context.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to 'video')

diff --git a/video/out/opengl/context.c b/video/out/opengl/context.c
index c863334306..9dbabd16a3 100644
--- a/video/out/opengl/context.c
+++ b/video/out/opengl/context.c
@@ -111,7 +111,13 @@ int mpgl_validate_backend_opt(struct mp_log *log, const struct m_option *opt,
 }
 
 #if HAVE_C11_TLS
-static _Thread_local MPGLContext *current_context;
+#define MP_TLS _Thread_local
+#elif defined(__GNU__)
+#define MP_TLS __thread
+#endif
+
+#ifdef MP_TLS
+static MP_TLS MPGLContext *current_context;
 
 static void * GLAPIENTRY get_native_display(const char *name)
 {
-- 
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