if(__USECXX14_CMAKE__)
    return()
endif()
set(__USECXX14_CMAKE__ TRUE)

if(APPLE)
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -stdlib=libc++ -std=c++1y")
elseif(UNIX)
    # assume GCC, add C++0x/C++11 stuff
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++14")
elseif(MINGW)
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++14")
endif()