(dirfd): Elide prototype if dirfd is a macro.

diff --git a/lib/dirfd.h b/lib/dirfd.h
index 01fa28e..422f976 100644 (file)
--- a/lib/dirfd.h
+++ b/lib/dirfd.h
@@ -22,6 +22,6 @@
 #ifndef HAVE_DECL_DIRFD
 "this configure-time declaration test was not run"
 #endif
-#if !HAVE_DECL_DIRFD
+#if !HAVE_DECL_DIRFD && !defined dirfd
 int dirfd (DIR const *);
 #endif