From af7a75cb517141f649cbbe0a9dcdb4854359b740 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michael@niedermayer.cc>
Date: Wed, 28 Dec 2016 23:41:29 +0100
Subject: [PATCH] configure: Check build with some header not just
 preprocessing for testing --std=c11

Fixes build failure on FreeBSD with gcc 4.7

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 configure | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/configure b/configure
index 56a0b657a9..f035f35ca2 100755
--- a/configure
+++ b/configure
@@ -1201,13 +1201,15 @@ check_cpp_condition(){
 EOF
 }
 
-test_cflags_cpp(){
-    log test_cflags_cpp "$@"
+test_cflags_cc(){
+    log test_cflags_cc "$@"
     flags=$1
-    condition=$2
-    shift 2
+    header=$2
+    condition=$3
+    shift 3
     set -- $($cflags_filter "$flags")
-    check_cpp "$@" <<EOF
+    check_cc "$@" <<EOF
+#include <$header>
 #if !($condition)
 #error "unsatisfied condition: $condition"
 #endif
@@ -4625,7 +4627,7 @@ add_cxxflags -std=c++98
 
 # some compilers silently accept -std=c11, so we also need to check that the
 # version macro is defined properly
-if test_cflags_cpp -std=c11 "__STDC_VERSION__ >= 201112L"; then
+if test_cflags_cc -std=c11 ctype.h "__STDC_VERSION__ >= 201112L"; then
     add_cflags -std=c11
 else
     check_cflags -std=c99