| enable_language (CXX) | |
| include(CheckCompilerFlag) | |
| check_compiler_flag(CXX "-_this_is_not_a_flag_" SHOULD_FAIL) | |
| if(SHOULD_FAIL) | |
| message(SEND_ERROR "invalid CXX compile flag didn't fail.") | |
| endif() | |
| if(CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang" AND NOT "x${CMAKE_CXX_SIMULATE_ID}" STREQUAL "xMSVC") | |
| check_compiler_flag(CXX "-x c++" SHOULD_WORK) | |
| if(NOT SHOULD_WORK) | |
| message(SEND_ERROR "${CMAKE_CXX_COMPILER_ID} compiler flag '-x c++' check failed") | |
| endif() | |
| endif() |