1include(CheckCSourceCompiles) 2 3macro(check_function_keywords _wordlist) 4 set(${_result} "") 5 foreach(flag ${_wordlist}) 6 string(REGEX REPLACE "[-+/ ()]" "_" flagname "${flag}") 7 string(TOUPPER "${flagname}" flagname) 8 set(have_flag "HAVE_${flagname}") 9 check_c_source_compiles("${flag} void func(); void func() { } int main() { func(); return 0; }" ${have_flag}) 10 if(${have_flag} AND NOT ${_result}) 11 set(${_result} "${flag}") 12 endif(${have_flag} AND NOT ${_result}) 13 endforeach(flag) 14endmacro(check_function_keywords) 15