--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/m4/sleep.m4	Tue Dec 22 05:33:32 2009 +0000
@@ -0,0 +1,24 @@
+# sleep.m4 serial 2
+dnl Copyright (C) 2007-2008 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_SLEEP],
+[
+  AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+  dnl We expect to see the declaration of sleep() in a header file.
+  dnl Older versions of mingw have a sleep() function that is an alias to
+  dnl _sleep() in MSVCRT. It has a different signature than POSIX sleep():
+  dnl it takes the number of milliseconds as argument and returns void.
+  dnl mingw does not declare this function.
+  AC_CHECK_DECLS([sleep], , , [#include <unistd.h>])
+  if test $ac_cv_have_decl_sleep != yes; then
+    HAVE_SLEEP=0
+    AC_LIBOBJ([sleep])
+    gl_PREREQ_SLEEP
+  fi
+])
+
+# Prerequisites of lib/sleep.c.
+AC_DEFUN([gl_PREREQ_SLEEP], [:])