File useknownGCCflag.patch of Package zanshin

--- zanshin-0.4.1/CMakeLists.txt	2016-11-21 16:01:51.528098093 +0100
+++ zanshin-0.4.1.new/CMakeLists.txt	2016-11-21 16:01:34.876162691 +0100
@@ -46,7 +46,11 @@ if(APPLE)
 endif()
 
 if(UNIX)
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++14")
+    if("${CMAKE_CXX_COMPILER_VERSION}" VERSION_LESS "5.0.0.0")
+       set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++1y")
+    else()
+       set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++14")
+    endif()
     set(CMAKE_CXX_STANDARD 14) # Enable C++14, with cmake >= 3.1
     set(CMAKE_CXX_EXTENSIONS OFF) # Don't enable gcc-specific extensions
 endif()