Makefile: allow building without perl

diff --git a/builtin-show-ref.c b/builtin-show-ref.c
index 572b114119db15f5f42dd79e3bc15e6d219f71db..dc76c5090f2367426201b37c5b13c2a5cbf00de2 100644 (file)
--- a/builtin-show-ref.c
+++ b/builtin-show-ref.c
@@ -140,7 +140,7 @@ static int exclude_existing(const char *match)
                                continue;
                }
                if (check_ref_format(ref)) {
-                       fprintf(stderr, "warning: ref '%s' ignored\n", ref);
+                       warning("ref '%s' ignored", ref);
                        continue;
                }
                if (!string_list_has_string(&existing_refs, ref)) {