set(CMAKE_C_COMPILER "clang")
set(CMAKE_CXX_COMPILER "clang++")
set(CMAKE_C_COMPILER_TARGET "x86_64-apple-darwin")
set(CMAKE_CXX_COMPILER_TARGET "x86_64-apple-darwin")
set(CMAKE_SYSTEM_NAME "Darwin")
set(CMAKE_SYSTEM_VERSION ${CMAKE_HOST_SYSTEM_VERSION})
set(CMAKE_OSX_ARCHITECTURES "x86_64" CACHE STRING "")