Add native Windows binary for bison.

bison/src/bison/2.4.1/bison-2.4.1-src/m4/timevar.m4

+# -*- 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 3 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, see <http://www.gnu.org/licenses/>.
+
+# 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
+])
+])