Add copyright notice.

(GNULIB_BOOT_TIME): Include sys/param.h before testing
for sys/sysctl.h; needed for OpenBSD 3.4.

diff --git a/m4/boottime.m4 b/m4/boottime.m4
index e4f405483b53859761612af865a4cd583970c362..f7acb08d48219b868d18b36f5c05e1d9641d02b6 100644 (file)
--- a/m4/boottime.m4
+++ b/m4/boottime.m4
@@ -1,11 +1,33 @@
+# boottime.m4 serial 2
 # Determine whether this system has infrastructure for obtaining the boot time.
 
+# Copyright (C) 1996, 2000, 2002, 2003, 2004 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation,
+# Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
 # GNULIB_BOOT_TIME([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
 * ----------------------------------------------------------
 AC_DEFUN([GNULIB_BOOT_TIME],
 [
   AC_CHECK_FUNCS(sysctl)
-  AC_CHECK_HEADERS(sys/sysctl.h)
+  AC_CHECK_HEADERS_ONCE(sys/param.h)
+  AC_CHECK_HEADERS(sys/sysctl.h, [], [],
+    [AC_INCLUDES_DEFAULT
+     [#if HAVE_SYS_PARAM_H
+       #include <sys/param.h>
+      #endif]])
   AC_CACHE_CHECK(
     [whether we can get the system boot time],
     [gnulib_cv_have_boot_time],
@@ -14,7 +36,9 @@ AC_DEFUN([GNULIB_BOOT_TIME],
        [AC_LANG_PROGRAM(
 [AC_INCLUDES_DEFAULT
 #if HAVE_SYSCTL && HAVE_SYS_SYSCTL_H
-# include <sys/param.h> /* needed for OpenBSD 3.0 */
+# if HAVE_SYS_PARAM_H
+#  include <sys/param.h> /* needed for OpenBSD 3.0 */
+# endif
 # include <sys/sysctl.h>
 #endif
 #ifdef HAVE_UTMPX_H