cmake PROCPS_HAS_ examples

poelzi/ulatencyd cmake/Modules/FindProcps.cmake :715 

unset(PROCPS_HAS_${_symbol} CACHE)

poelzi/ulatencyd cmake/Modules/FindProcps.cmake :721 

CHECK_SYMBOL_EXISTS("${_symbol}" "${PROCPS_HEADERS}"
              PROCPS_HAS_${_symbol} )