bash prompt: mention that PROMPT_COMMAND mode is faster

diff --git a/parse-options.h b/parse-options.h
index 854181113731070fee38c86c95b42822d03e1e26..c378b75b13317d27f05232c7a035ddad2374a87e 100644 (file)
--- a/parse-options.h
+++ b/parse-options.h
@@ -180,6 +180,10 @@ extern NORETURN void usage_msg_opt(const char *msg,
 
 extern int optbug(const struct option *opt, const char *reason);
 extern int opterror(const struct option *opt, const char *reason, int flags);
+#if defined(__GNUC__) && ! defined(clang)
+#define opterror(o,r,f) (opterror((o),(r),(f)), -1)
+#endif
+
 /*----- incremental advanced APIs -----*/
 
 enum {