-DEFS = @DEFS@ \
- -DXPFILE=\"${datadir}/bison.simple\" \
- -DXPFILE1=\"${datadir}/bison.hairy\" \
- -DLOCALEDIR=\"${datadir}/locale\"
-INCLUDES = -I../intl -I$(top_srcdir)/lib -I..
-LDADD = @INTLLIBS@ ../lib/libbison.a
+## 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
+
+DEFS += -DPKGDATADIR=\"$(pkgdatadir)\" -DLOCALEDIR=\"$(datadir)/locale\"
+
+AM_CFLAGS = $(WARNING_CFLAGS) $(WERROR_CFLAGS)
+AM_CPPFLAGS = -I$(top_srcdir)/lib -I../lib
+AM_YFLAGS = "-dv"
+
+LDADD = ../lib/libbison.a $(LIBINTL)
+
+# Use our own Bison to build the parser. Of course, you ought to
+# keep a sane version of Bison nearby...
+YACC = ../tests/bison -y