From a47cb146809e32f43449dcfe9932833c2f0ab987 Mon Sep 17 00:00:00 2001
From: Allan Sandfeld Jensen <allan.jensen@qt.io>
Date: Wed, 14 Feb 2018 13:40:57 +0100
Subject: Detect C standard and try using the most recent

Fixes the default C version used with gcc < 5

Change-Id: I948dece961caed8e6b181e1c6e6b9dc43c46583f
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>
---
 src/corelib/global/qcompilerdetection.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/corelib')

diff --git a/src/corelib/global/qcompilerdetection.h b/src/corelib/global/qcompilerdetection.h
index f3f3139d1a..e5e47082d8 100644
--- a/src/corelib/global/qcompilerdetection.h
+++ b/src/corelib/global/qcompilerdetection.h
@@ -898,7 +898,7 @@
        /* C11 features supported in GCC 4.7: */
 #      define Q_COMPILER_STATIC_ASSERT
 #    endif
-#    if Q_CC_GNU >= 409
+#    if Q_CC_GNU >= 409 && defined(__has_include)
        /* C11 features supported in GCC 4.9: */
 #      if __has_include(<threads.h>)
 #        define Q_COMPILER_THREAD_LOCAL
-- 
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