include(CheckCCompilerFlag) macro(add_compiler_flags) foreach(flag ${ARGN}) string(REGEX REPLACE "[-.+/:= ]" "_" _flag_esc "${flag}") check_c_compiler_flag("${flag}" check_c_compiler_flag_${_flag_esc}) if (check_c_compiler_flag_${_flag_esc}) set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${flag}") endif() endforeach() endmacro()