if else endif foreach endforeach add_global_arguments build_target configuration_data configure_file custom_target declare_dependency dependency error executable find_program find_library files generator get_option gettext import include_directories install_data install_headers install_man install_subdir is_subproject jar message pkgconfig_gen project run_command run_target set_variable shared_library static_library subdir subproject test vcs_tag and or not true false