| |
| 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) |
