X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Frmdir-errno.m4;h=7693bc70b46b066b69c373d4e3294cfc201bba1f;hb=ce401f14c2ef12dc46725ffd6f076b75c6ec72a0;hp=c6b582947f0d51e50dff50e628015d0bdb2dd6aa;hpb=f2b62ff7e6360f418df082926030ff4dc77c5ca3;p=gnulib.git

diff --git a/m4/rmdir-errno.m4 b/m4/rmdir-errno.m4
index c6b582947..7693bc70b 100644
--- a/m4/rmdir-errno.m4
+++ b/m4/rmdir-errno.m4
@@ -1,4 +1,4 @@
-#serial 6
+#serial 8
 
 # Copyright (C) 2000, 2001, 2005, 2006 Free Software Foundation, Inc.
 # This file is free software; the Free Software Foundation
@@ -12,6 +12,7 @@
 # test runs a test to determine the actual numeric value.
 AC_DEFUN([gl_FUNC_RMDIR_NOTEMPTY],
 [dnl
+  AC_CHECK_HEADERS_ONCE(unistd.h)
   AC_CACHE_CHECK([for rmdir-not-empty errno value],
     gl_cv_func_rmdir_errno_not_empty,
     [
@@ -21,8 +22,8 @@ AC_DEFUN([gl_FUNC_RMDIR_NOTEMPTY],
       AC_TRY_RUN([
 #include <stdio.h>
 #include <errno.h>
-#ifndef errno
-extern int errno;
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
 #endif
 	int main ()
 	{