diff -up m4-1.4.16/tests/test-readlink.h.orig m4-1.4.16/tests/test-readlink.h

--- m4-1.4.16/tests/test-readlink.h.orig	2011-09-19 12:44:58.745546826 +0200

+++ m4-1.4.16/tests/test-readlink.h	2011-09-19 12:46:00.079548410 +0200

@@ -38,7 +38,7 @@ test_readlink (ssize_t (*func) (char con

   ASSERT (errno == ENOENT);

   errno = 0;

   ASSERT (func ("", buf, sizeof buf) == -1);

-  ASSERT (errno == ENOENT);

+  ASSERT (errno == ENOENT || errno == EINVAL);

   errno = 0;

   ASSERT (func (".", buf, sizeof buf) == -1);

   ASSERT (errno == EINVAL);