doc: discuss named references after locations.

[bison.git] / m4 / timevar.m4

diff --git a/m4/timevar.m4 b/m4/timevar.m4
index fe078990924d969fe132971891c30a3ae6b2f5cf..2db0dfd8e55899a4610aaeda499d2eef396a0033 100644 (file)
--- a/m4/timevar.m4
+++ b/m4/timevar.m4
@@ -1,11 +1,11 @@
-# -*-Autoconf-*-
-# Checks required to run `stage', a nonportable memory/time tracker.
+# -*- Autoconf -*-
+# Checks required to run `timevar', a time tracker.
 #
-# Copyright (C) 2002 Free Software Foundation, Inc.
+# Copyright (C) 2002-2003, 2009-2011 Free Software Foundation, Inc.
 #
-# This program is free software; you can redistribute it and/or modify
+# 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 of the License, or
+# the Free Software Foundation, either version 3 of the License, or
 # (at your option) any later version.
 #
 # This program is distributed in the hope that it will be useful,
@@ -14,34 +14,46 @@
 # 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
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-# serial 1
+# serial 2
 
 AC_DEFUN([BISON_PREREQ_TIMEVAR],
-[AC_CHECK_HEADERS([sys/resource.h sys/times.h])
-
+[AC_CHECK_HEADERS([sys/time.h sys/times.h])
+ AC_CHECK_HEADERS([sys/resource.h],,,
+   [$ac_includes_default
+#if HAVE_SYS_TIME_H
+# include <sys/time.h>
+#endif
+#ifdef HAVE_SYS_TIMES_H
+# include <sys/times.h>
+#endif
+])
 AC_CHECK_FUNCS([times])
 
 AC_CHECK_DECLS([getrusage, times, clock, sysconf], [], [],
 [$ac_includes_default
-#if HAVE_SYS_RESOURCE_H
-# include <sys/resource.h>
+#if HAVE_SYS_TIME_H
+# include <sys/time.h>
 #endif
 #if HAVE_SYS_TIMES_H
 # include <sys/times.h>
 #endif
+#if HAVE_SYS_RESOURCE_H
+# include <sys/resource.h>
+#endif
 ])
 
 AC_CHECK_TYPES([clock_t, struct tms], [], [],
 [$ac_includes_default
-#if HAVE_SYS_RESOURCE_H
-# include <sys/resource.h>
+#if HAVE_SYS_TIME_H
+# include <sys/time.h>
 #endif
 #if HAVE_SYS_TIMES_H
 # include <sys/times.h>
 #endif
+#if HAVE_SYS_RESOURCE_H
+# include <sys/resource.h>
+#endif
 ])
 ])