parse-options: add new function "usage_msg_opt"

diff --git a/parse-options.h b/parse-options.h
index b374ade95c382afd742a32c80338e32cc565cab2..f0f885c67de0905d80e414ce3c4b0aa83d3c813c 100644 (file)
--- a/parse-options.h
+++ b/parse-options.h
@@ -132,6 +132,10 @@ extern int parse_options(int argc, const char **argv, const char *prefix,
 extern NORETURN void usage_with_options(const char * const *usagestr,
                                         const struct option *options);
 
+extern NORETURN void usage_msg_opt(const char *msg,
+                                  const char * const *usagestr,
+                                  const struct option *options);
+
 /*----- incremental advanced APIs -----*/
 
 enum {