| |
| enable_language (C) |
| include(CheckCompilerFlag) |
| |
| set(C 1) # test that this is tolerated |
| |
| # test that the check uses an isolated locale |
| set(_env_LC_ALL "${LC_ALL}") |
| set(ENV{LC_ALL} "BAD") |
| |
| check_compiler_flag(C "-_this_is_not_a_flag_" SHOULD_FAIL) |
| if(SHOULD_FAIL) |
| message(SEND_ERROR "invalid C compile flag didn't fail.") |
| endif() |
| |
| if(CMAKE_C_COMPILER_ID MATCHES "GNU|LCC|Clang" AND NOT "x${CMAKE_C_SIMULATE_ID}" STREQUAL "xMSVC") |
| check_compiler_flag(C "-x c" SHOULD_WORK) |
| if(NOT SHOULD_WORK) |
| message(SEND_ERROR "${CMAKE_C_COMPILER_ID} compiler flag '-x c' check failed") |
| endif() |
| endif() |
| |
| if(CMAKE_C_COMPILER_ID STREQUAL "GNU") # LCC C compiler silently ignore -frtti instead of failing, so skip it here. |
| check_compiler_flag(C "-frtti" SHOULD_FAIL_RTTI) |
| if(SHOULD_FAIL_RTTI) |
| message(SEND_ERROR "${CMAKE_C_COMPILER_ID} compiler flag '-frtti' check passed but should have failed") |
| endif() |
| endif() |
| |
| if(NOT "$ENV{LC_ALL}" STREQUAL "BAD") |
| message(SEND_ERROR "ENV{LC_ALL} was not preserved by check_compiler_flag") |
| endif() |
| set(ENV{LC_ALL} ${_env_LC_ALL}) |
