| enable_language(C) | |
| function(check_language_feature_flags lang level) | |
| if(CMAKE_${lang}${level}_STANDARD_COMPILE_OPTION) | |
| #this property is an internal implementation detail of CMake | |
| get_property(known_features GLOBAL PROPERTY CMAKE_${lang}${level}_KNOWN_FEATURES) | |
| list(LENGTH known_features len) | |
| if(len LESS 1) | |
| message(FATAL_ERROR "unable to find known features of ${lang}${level}") | |
| endif() | |
| string(TOLOWER ${lang} lang_lower) | |
| set(known_name ${lang_lower}${level}_known_features) | |
| set(meta_name ${lang_lower}${level}_meta_feature) | |
| add_library(${known_name} STATIC a.c) | |
| target_compile_features(${known_name} PUBLIC ${known_features}) | |
| add_library(${meta_name} STATIC a.c) | |
| target_compile_features(${meta_name} PUBLIC ${lang_lower}_std_${level}) | |
| endif() | |
| endfunction() | |
| check_language_feature_flags(C 90) | |
| check_language_feature_flags(C 99) | |
| check_language_feature_flags(C 11) |