Add native Windows binary for bison.

bison/src/bison/2.4.1/bison-2.4.1-src/lib/Makefile.am

+# Make bison/lib.
+
+# Copyright (C) 2001, 2002, 2003, 2004, 2006, 2008 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/>.
+
+include gnulib.mk
+
+AM_CFLAGS = $(WARN_CFLAGS)
+
+# Implementation of bitsets.
+bitsets_sources = \
+  abitset.c abitset.h bbitset.h bitset.c bitset.h bitset_stats.c        \
+  bitset_stats.h bitsetv.c bitsetv.h ebitset.c ebitset.h lbitset.c      \
+  lbitset.h libiberty.h vbitset.c vbitset.h
+
+# Additional bitset operations.
+additional_bitsets_sources = \
+  bitsetv-print.h bitsetv-print.c
+
+# timevars, stolen from GCC.
+timevars_sources = \
+  timevar.h timevar.c timevar.def
+
+# Non-gnulib sources in Bison's internal library.
+libbison_a_SOURCES += \
+  get-errno.h get-errno.c \
+  subpipe.h subpipe.c \
+  $(bitsets_sources) $(additional_bitsets_sources) $(timevars_sources)
+
+# The Yacc compatibility library.
+lib_LIBRARIES = $(YACC_LIBRARY)
+EXTRA_LIBRARIES = liby.a
+liby_a_SOURCES = main.c yyerror.c