1enable_language(C)
2
3if(NOT CMAKE_HOST_SYSTEM_PROCESSOR STREQUAL "x86_64")
4  message(FATAL_ERROR "CMAKE_HOST_SYSTEM_PROCESSOR is '${CMAKE_HOST_SYSTEM_PROCESSOR}', not 'x86_64'")
5endif()
6if(NOT CMAKE_OSX_ARCHITECTURES STREQUAL "")
7  message(FATAL_ERROR "CMAKE_OSX_ARCHITECTURES is '${CMAKE_OSX_ARCHITECTURES}', not empty ''")
8endif()
9
10add_library(x86_64 x86_64.c)
11