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+# -*- Autoconf -*-
+# Checks required to run `timevar', a time tracker.
+#
+# Copyright (C) 2002, 2003 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 of the License, 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., 51 Franklin Street, Fifth Floor, Boston, MA
+# 02110-1301 USA
+
+# serial 2
+
+AC_DEFUN([BISON_PREREQ_TIMEVAR],
+[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_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_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
+])
+])