From ee2ba599e7b0aa002dc7257458c19bdb64fd6252 Mon Sep 17 00:00:00 2001
From: "Dmitrij D. Czarkoff" <czarkoff@gmail.com>
Date: Thu, 20 Oct 2016 16:51:21 +0200
Subject: build: don't rely on "__thread" being always available with GCC

Thread-local storage in GCC is platform-specific, and some platforms that
are otherwise perfectly capable of running mpv may lack TLS support in GCC.

This change adds a test for GCC variant of TLS and relies on its result
instead of assumption.

Provided that LLVM's `__thread` support is similar to GCC, the test is
called "GCC/LLVM TLS".

Signed-off-by: wm4 <wm4@nowhere>
---
 wscript | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'wscript')

diff --git a/wscript b/wscript
index ccdf3a9fdc..9fa00b01f0 100644
--- a/wscript
+++ b/wscript
@@ -185,6 +185,10 @@ main_dependencies = [
         'name': 'c11-tls',
         'desc': 'C11 TLS support',
         'func': check_statement('stddef.h', 'static _Thread_local int x = 0'),
+    }, {
+        'name': 'gcc-tls',
+        'desc': 'GCC TLS support',
+        'func': check_statement('stddef.h', 'static __thread int x = 0'),
     }, {
         'name': 'librt',
         'desc': 'linking with -lrt',
-- 
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