1 files changed, 7 insertions, 37 deletions
diff --git a/m4/sleep.m4 b/m4/sleep.m4
index a5ec655..2c9d75c 100644
--- a/m4/sleep.m4
+++ b/m4/sleep.m4
@@ -1,5 +1,5 @@
-# sleep.m4 serial 3
-dnl Copyright (C) 2007-2010 Free Software Foundation, Inc.
+# sleep.m4 serial 1
+dnl Copyright (C) 2007 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.
@@ -7,43 +7,13 @@ 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>])
   AC_CHECK_FUNCS_ONCE([sleep])
-  if test $ac_cv_have_decl_sleep != yes; then
+  if test $ac_cv_func_sleep = no; then
     HAVE_SLEEP=0
     AC_LIBOBJ([sleep])
-  else
-    dnl Cygwin 1.5.x has a bug where sleep can't exceed 49.7 days.
-    AC_CACHE_CHECK([for working sleep], [gl_cv_func_sleep_works],
-      [AC_RUN_IFELSE([AC_LANG_PROGRAM([[
-#include <errno.h>
-#include <unistd.h>
-#include <signal.h>
-static void
-handle_alarm (int sig)
-{
-  if (sig != SIGALRM)
-    _exit (2);
-}
-]], [[
-    /* Failure to compile this test due to missing alarm is okay,
-       since all such platforms (mingw) also lack sleep.  */
-    unsigned int pentecost = 50 * 24 * 60 * 60; /* 50 days.  */
-    unsigned int remaining;
-    signal (SIGALRM, handle_alarm);
-    alarm (1);
-    remaining = sleep (pentecost);
-    return !(pentecost - 10 < remaining && remaining <= pentecost);]])],
-      [gl_cv_func_sleep_works=yes], [gl_cv_func_sleep_works=no],
-      [gl_cv_func_sleep_works="guessing no"])])
-    if test "$gl_cv_func_sleep_works" != yes; then
-      REPLACE_SLEEP=1
-      AC_LIBOBJ([sleep])
-    fi
+    gl_PREREQ_SLEEP
   fi
 ])
+
+# Prerequisites of lib/sleep.c.
+AC_DEFUN([gl_PREREQ_SLEEP], [:])