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

diff --git a/test-parse-options.c b/test-parse-options.c
index efa734b42e38d7f5a98393cd69ac0ffe10160ffc..acd1a2ba70fc2ffb38cd8fb0784aa6e5e693183f 100644 (file)
--- a/test-parse-options.c
+++ b/test-parse-options.c
@@ -8,6 +8,7 @@ static int abbrev = 7;
 static int verbose = 0, dry_run = 0, quiet = 0;
 static char *string = NULL;
 static char *file = NULL;
+static int ambiguous;
 
 static int length_callback(const struct option *opt, const char *arg, int unset)
 {
@@ -59,6 +60,10 @@ int main(int argc, const char **argv)
                        number_callback),
                { OPTION_BOOLEAN, '+', NULL, &boolean, NULL, "same as -b",
                  PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_NODASH },
+               { OPTION_BOOLEAN, 0, "ambiguous", &ambiguous, NULL,
+                 "positive ambiguity", PARSE_OPT_NOARG | PARSE_OPT_NONEG },
+               { OPTION_BOOLEAN, 0, "no-ambiguous", &ambiguous, NULL,
+                 "negative ambiguity", PARSE_OPT_NOARG | PARSE_OPT_NONEG },
                OPT_GROUP("Standard options"),
                OPT__ABBREV(&abbrev),
                OPT__VERBOSE(&verbose),