From 796ca00f3c8ab907d41c8b420723878dc1019795 Mon Sep 17 00:00:00 2001
From: Florent Castelli <florent.castelli@gmail.com>
Date: Sat, 21 Jan 2017 02:36:41 +0100
Subject: [PATCH] cmake: Don't add GCC flag to MSVC in libpng

---
 Externals/libpng/CMakeLists.txt | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Externals/libpng/CMakeLists.txt b/Externals/libpng/CMakeLists.txt
index 122007c7c5..8489e6944a 100644
--- a/Externals/libpng/CMakeLists.txt
+++ b/Externals/libpng/CMakeLists.txt
@@ -18,5 +18,7 @@ set(SRCS
   pngwtran.c
   pngwutil.c
 )
-add_definitions(-Wno-self-assign)
+if(NOT MSVC)
+	add_definitions(-Wno-self-assign)
+endif()
 add_library(png STATIC ${SRCS})