mfcalc: extract and exercise.

* examples/mfcalc/local.mk, examples/mfcalc/test: New,
	based on calc++'s ones.
	* examples/local.mk: Include mfcalc/local.mk.

examples/mfcalc/local.mk

@@ -0,0 +1,57 @@
+## Process this file with automake to produce Makefile.in -*-Makefile-*-
+
+## Copyright (C) 2005-2006, 2008-2012 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/>.
+
+## ------------ ##
+## Extracting.  ##
+## ------------ ##
+
+# Extract in src.
+$(top_srcdir)/examples/mfcalc/mfcalc.stamp: $(doc) $(extexi)
+	$(AM_V_GEN)rm -f $@ $@.tmp
+	$(AM_V_at)touch $@.tmp
+	$(AM_V_at)cd $(top_srcdir)/examples/mfcalc && \
+	   $(AWK) -f ../extexi -v VERSION="$(VERSION)" \
+	     ../../doc/bison.texinfo -- calc.h mfcalc.y
+	$(AM_V_at)mv $@.tmp $@
+
+$(mfcalc_extracted): $(top_srcdir)/examples/mfcalc/mfcalc.stamp
+	$(AM_V_GEN)if test -f $@; then :; else \
+	  rm -f $< && \
+	  $(MAKE) $(AM_MAKEFLAGS) $<; \
+	fi
+
+## -------------------- ##
+## Building & testing.  ##
+## -------------------- ##
+
+BUILT_SOURCES += $(mfcalc_sources)
+MAINTAINERCLEANFILES += $(top_srcdir)/examples/mfcalc/mfcalc.stamp $(mfcalc_sources)
+EXTRA_DIST += examples/mfcalc/mfcalc.stamp
+
+mfcalc_extracted =				\
+  examples/mfcalc/calc.h			\
+  examples/mfcalc/mfcalc.y
+mfcalc_sources =				\
+  $(mfcalc_extracted)
+
+check_PROGRAMS += examples/mfcalc/mfcalc
+examples_mfcalc_mfcalc_SOURCES =		\
+  $(mfcalc_sources)
+
+examples_mfcalc_mfcalc_CPPFLAGS = -I$(top_srcdir)/examples/mfcalc
+TESTS += examples/mfcalc/test
+EXTRA_DIST += examples/mfcalc/test