Tests of module 'time' in C++ mode.

[gnulib.git] / m4 / sys_file_h.m4

diff --git a/m4/sys_file_h.m4 b/m4/sys_file_h.m4
index 436c6fe..d864dad 100644 (file)
--- a/m4/sys_file_h.m4
+++ b/m4/sys_file_h.m4
@@ -1,6 +1,7 @@
 # Configure a replacement for <sys/file.h>.
+# serial 3
 
-# Copyright (C) 2008 Free Software Foundation, Inc.
+# Copyright (C) 2008, 2009, 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.
@@ -16,8 +17,6 @@ AC_DEFUN([gl_HEADER_SYS_FILE_H],
   AC_CHECK_FUNCS_ONCE([flock])
 
   gl_CHECK_NEXT_HEADERS([sys/file.h])
-  SYS_FILE_H='sys/file.h'
-  AC_SUBST([SYS_FILE_H])
 
   AC_CHECK_HEADERS_ONCE([sys/file.h])
   if test $ac_cv_header_sys_file_h = yes; then
@@ -26,6 +25,11 @@ 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],