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

diff --git a/parse-options.h b/parse-options.h
index 0c996916b6044989f0e2945881c7c12f7292d5c1..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;
@@ -135,6 +135,10 @@ struct option {
          PARSE_OPT_NOARG | PARSE_OPT_NONEG, (f) }
 #define OPT_FILENAME(s, l, v, h)    { OPTION_FILENAME, (s), (l), (v), \
                                       "FILE", (h) }
+#define OPT_COLOR_FLAG(s, l, v, h) \
+       { OPTION_CALLBACK, (s), (l), (v), "when", (h), PARSE_OPT_OPTARG, \
+               parse_opt_color_flag_cb, (intptr_t)"always" }
+
 
 /* parse_options() will filter out the processed options and leave the
  * non-option arguments in argv[].
@@ -156,7 +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
 };
 
 /*
@@ -183,10 +187,12 @@ 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);
 extern int parse_opt_approxidate_cb(const struct option *, const char *, int);
+extern int parse_opt_color_flag_cb(const struct option *, const char *, int);
 extern int parse_opt_verbosity_cb(const struct option *, const char *, int);
 extern int parse_opt_with_commit(const struct option *, const char *, int);
 extern int parse_opt_tertiary(const struct option *, const char *, int);
@@ -203,5 +209,7 @@ extern int parse_opt_tertiary(const struct option *, const char *, int);
        { OPTION_CALLBACK, 0, "abbrev", (var), "n", \
          "use <n> digits to display SHA-1s", \
          PARSE_OPT_OPTARG, &parse_opt_abbrev_cb, 0 }
+#define OPT__COLOR(var, h) \
+       OPT_COLOR_FLAG(0, "color", (var), (h))
 
 #endif