function(wpilib_config) cmake_parse_arguments(config "" "" "OPTIONS;REQUIRES" ${ARGN}) foreach(opt ${config_OPTIONS}) if(NOT ${opt}) return() endif() endforeach() foreach(required_opt ${config_REQUIRES}) if(NOT ${required_opt}) list(JOIN config_OPTIONS " and " options_list) list(LENGTH config_OPTIONS option_len) if(option_len GREATER 1) set(requires require) set(option_msg "one of the listed options") else() set(requires requires) set(option_msg ${options_list}) endif() message( FATAL_ERROR " FATAL: ${options_list} ${requires} ${required_opt}. Either enable ${required_opt} or disable ${option_msg}. " ) endif() endforeach() endfunction()