-argp_err_exit_status NEW: argp
-argp_error NEW: argp
-argp_failure NEW: argp
-argp_help NEW: argp
-argp_parse NEW: argp
-argp_program_bug_address NEW: argp
-argp_program_version NEW: argp
-argp_program_version_hook NEW: argp
-argp_state_help NEW: argp
-argp_usage NEW: argp
+argp_err_exit_status NEW: argp, GNU ext
+argp_error NEW: argp, GNU ext
+argp_failure NEW: argp, GNU ext
+argp_help NEW: argp, GNU ext
+argp_parse NEW: argp, GNU ext
+argp_program_bug_address NEW: argp, GNU ext
+argp_program_version NEW: argp, GNU ext
+argp_program_version_hook NEW: argp, GNU ext
+argp_state_help NEW: argp, GNU ext
+argp_usage NEW: argp, GNU ext