difftool: use perl built-ins when testing for msys

[git.git] / parse-options.c

diff --git a/parse-options.c b/parse-options.c
index 8b21dea72e12416c806ae636e8a6f20f31ab9af8..cf71bcffd2e1e9aeacb44df488b0825f09d54255 100644 (file)
--- a/parse-options.c
+++ b/parse-options.c
@@ -244,6 +244,9 @@ void parse_options_start(struct parse_opt_ctx_t *ctx,
        ctx->out  = argv;
        ctx->cpidx = ((flags & PARSE_OPT_KEEP_ARGV0) != 0);
        ctx->flags = flags;
+       if ((flags & PARSE_OPT_KEEP_UNKNOWN) &&
+           (flags & PARSE_OPT_STOP_AT_NON_OPTION))
+               die("STOP_AT_NON_OPTION and KEEP_UNKNOWN don't go together");
 }
 
 static int usage_with_options_internal(const char * const *,
@@ -364,6 +367,9 @@ int parse_options(int argc, const char **argv, const struct option *options,
 int usage_with_options_internal(const char * const *usagestr,
                                const struct option *opts, int full)
 {
+       if (!usagestr)
+               return PARSE_OPT_HELP;
+
        fprintf(stderr, "usage: %s\n", *usagestr++);
        while (*usagestr && **usagestr)
                fprintf(stderr, "   or: %s\n", *usagestr++);