add: make warn_pathless_add() a no-op after first call

diff --git a/parse-options.h b/parse-options.h
index 71a39c60d942601a1cf30e218df56777742d5580..1c8bd8d5a0894d9deda1e849165ff38e8d594a4d 100644 (file)
--- a/parse-options.h
+++ b/parse-options.h
@@ -177,6 +177,10 @@ 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 {