X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fsys_file_h.m4;h=fac106a092365dab194f70af5fdb0fd96074b2f0;hb=062cad2d07081f9a60adbb90fc1184a435a1a93f;hp=419dda84385a432dcd69a0c2b5bdb84aa5abda47;hpb=d1a73882fc992d3184bec3a4ccd57b52d95a7458;p=gnulib.git

diff --git a/m4/sys_file_h.m4 b/m4/sys_file_h.m4
index 419dda843..fac106a09 100644
--- a/m4/sys_file_h.m4
+++ b/m4/sys_file_h.m4
@@ -1,22 +1,18 @@
 # Configure a replacement for <sys/file.h>.
+# serial 4
 
-# Copyright (C) 2008, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2008-2010 Free Software Foundation, Inc.
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
 # with or without modifications, as long as this notice is preserved.
 
 # Written by Richard W.M. Jones.
 
-# serial 2
-
 AC_DEFUN([gl_HEADER_SYS_FILE_H],
 [
   AC_REQUIRE([gl_HEADER_SYS_FILE_H_DEFAULTS])
 
-  dnl Only flock is defined in a working <sys/file.h>.  If that
-  dnl function is already there, we don't want to do any substitution.
-  AC_CHECK_FUNCS_ONCE([flock])
-
+  dnl <sys/file.h> is always overridden, because of GNULIB_POSIXCHECK.
   gl_CHECK_NEXT_HEADERS([sys/file.h])
 
   AC_CHECK_HEADERS_ONCE([sys/file.h])
@@ -26,6 +22,11 @@ AC_DEFUN([gl_HEADER_SYS_FILE_H],
     HAVE_SYS_FILE_H=0
   fi
   AC_SUBST([HAVE_SYS_FILE_H])
+
+  dnl Check for declarations of anything we want to poison if the
+  dnl corresponding gnulib module is not in use.
+  gl_WARN_ON_USE_PREPARE([[#include <sys/file.h>
+    ]], [flock])
 ])
 
 AC_DEFUN([gl_HEADER_SYS_FILE_MODULE_INDICATOR],