--- CMakeLists.txt.orig	2013-12-23 21:06:50.000000000 +0900
+++ CMakeLists.txt	2013-12-23 21:07:00.000000000 +0900
@@ -35,6 +35,8 @@
 INCLUDE(MacroOptionalAddSubdirectory)
 INCLUDE(FindPackageHandleStandardArgs)
 
+SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-return-type")
+
 # NOTE: Libraw 0.16.x is prefered version to use because it's ported to Cmake with full features supported.
 # Until libraw 0.16.0 is release (ends of 2013), we will support previous version (with limited support)
 FIND_PACKAGE(LibRaw 0.15 REQUIRED)