From e07a105b7cbd78407bbbe772ab9df9271eae51c2 Mon Sep 17 00:00:00 2001
From: Lovell Fuller <github@lovell.info>
Date: Mon, 11 May 2015 11:54:53 +0100
Subject: [PATCH] Test availability of __has_feature macro

---
 src/common.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/common.cc b/src/common.cc
index c1474390..6bc403a2 100755
--- a/src/common.cc
+++ b/src/common.cc
@@ -14,9 +14,11 @@
 #error GCC version 4.6+ is required for C++11 features - see https://github.com/lovell/sharp#prerequisites
 #endif
 
-#if (defined(__clang__) && !__has_feature(cxx_range_for))
+#if (defined(__clang__) && defined(__has_feature))
+#if (!__has_feature(cxx_range_for))
 #error clang version 3.0+ is required for C++11 features - see https://github.com/lovell/sharp#prerequisites
 #endif
+#endif
 
 namespace sharp {