From e556287a3b66bcf37dc138e9f3673dc1318243cb Mon Sep 17 00:00:00 2001
From: Brecht Van Lommel <brecht@solidangle.com>
Date: Mon, 23 Nov 2015 18:22:53 +0100
Subject: [PATCH] CMake: enable -std=gnu99 for clang and icc.

---
 CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 507676667c9..cae1c24df33 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2774,7 +2774,7 @@ if(WITH_CPP11)
 endif()
 
 # Visual Studio has all standards it supports available by default
-if(CMAKE_COMPILER_IS_GNUCC)
+if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_C_COMPILER_ID MATCHES "Clang" OR CMAKE_C_COMPILER_ID MATCHES "Intel")
 	# Use C99 + GNU extensions, works with GCC, Clang, ICC
 	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=gnu99")
 endif()