test_cmp: do not use "diff -u" on platforms that lack one

diff --git a/parse-options.h b/parse-options.h
index 9429f7e36112b7b9cf52d4b3b68b007938396322..678b58db8e49d9c9f8a11811e632dd9b81a9d9a8 100644 (file)
--- a/parse-options.h
+++ b/parse-options.h
@@ -25,7 +25,7 @@ enum parse_opt_flags {
        PARSE_OPT_STOP_AT_NON_OPTION = 2,
        PARSE_OPT_KEEP_ARGV0 = 4,
        PARSE_OPT_KEEP_UNKNOWN = 8,
-       PARSE_OPT_NO_INTERNAL_HELP = 16,
+       PARSE_OPT_NO_INTERNAL_HELP = 16
 };
 
 enum parse_opt_option_flags {
@@ -36,7 +36,7 @@ enum parse_opt_option_flags {
        PARSE_OPT_LASTARG_DEFAULT = 16,
        PARSE_OPT_NODASH = 32,
        PARSE_OPT_LITERAL_ARGHELP = 64,
-       PARSE_OPT_NEGHELP = 128,
+       PARSE_OPT_NEGHELP = 128
 };
 
 struct option;
@@ -160,7 +160,7 @@ extern NORETURN void usage_msg_opt(const char *msg,
 enum {
        PARSE_OPT_HELP = -1,
        PARSE_OPT_DONE,
-       PARSE_OPT_UNKNOWN,
+       PARSE_OPT_UNKNOWN
 };
 
 /*
@@ -187,6 +187,7 @@ extern int parse_options_step(struct parse_opt_ctx_t *ctx,
 
 extern int parse_options_end(struct parse_opt_ctx_t *ctx);
 
+extern int parse_options_concat(struct option *dst, size_t, struct option *src);
 
 /*----- some often used options -----*/
 extern int parse_opt_abbrev_cb(const struct option *, const char *, int);