cmake HAVE_CEIL examples

SWI-Prolog/swipl-devel cmake/Config.cmake :237 

check_function_exists(ceil HAVE_CEIL)

drowe67/codec2-dev CMakeLists.txt :159 

check_symbol_exists(ceil   math.h   HAVE_CEIL)

in-formant/in-formant external/libsamplerate/CMakeLists.txt :99 

check_function_exists(ceil HAVE_CEIL)