groff-psbb

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# GNUmakefile
#
# Simple makefile to build .psbb request handler test/demonstration
# program; with no apology, this may gratuitously require GNU make.
#
# Written by Keith Marshall <keith@users.osdn.me>
# Copyright (C) 2017, Free Software Foundation, Inc.
#
# This file is part of groff.
#
# groff 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.
#
# groff 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/>.
#
all: psbb
all-debug: psbb state.map
all-debug: CPPFLAGS += -DEBUG

srcdir = .
vpath %.l  ${srcdir}
vpath %.y  ${srcdir}

# For convenience, we've placed a necessary subset of libgroff sources
# and headers in our local libgroff subdirectory; ensure that make, and 
# the C/C++ compilers can see them.
#
vpath %.c    ${srcdir} ${srcdir}/libgroff
vpath %.cpp  ${srcdir} ${srcdir}/libgroff
vpath %.h    ${srcdir} ${srcdir}/libgroff

CFLAGS = -g -O2
CXXFLAGS = -g -O2

CPPFLAGS += -I ${srcdir} -I ${srcdir}/libgroff


# GNU make's default $(YACC) rule doesn't satisfy the dependencies we
# would like, so we specify our own alternative rule.
#
%.tab.c %.tab.h: %.y
	$(YACC) $(YFLAGS) -b $* -d $<

# When running this $(YACC) rule, we may need supplementary $(YFLAGS)
# to assign a symbol prefix, so that we do not depend on non-portable
# directives, supported by bison, but not by yacc.
#
psbb.tab.c psbb.tab.h: YFLAGS += -p psbb_

# This is a minimal subset of libgroff.a, (just sufficient to satisfy
# our immediate requirements for our .psbb handler test program).
#
libgroff.a: error.o errarg.o itoa.o fatal.o
	$(AR) rcs $@ $^

# By default, GNU make uses $(CC) for linking, but we need C++ support,
# (which $(CC) doesn't give us automatically); moreover, we do not want
# psbb to incur a default dependency on psbb.o, so link explicitly.
#
psbb: t-psbb.o psbblex.o psbb.tab.o libgroff.a
	$(CXX) $(LDFLAGS) $(TARGET_ARCH) $^ -o $@


# Object file dependencies: GCC could generate these automatically, but
# this is simpler, in this trivial instance.
#
psbblex.o: psbblex.c psbb.tab.h psbb.h
t-psbb.o psbblex.o psbb.tab.o error.o errarg.o: error.h errarg.h
t-psbb.o: psbb.h


# Rules to derive, from psbblex.l source, a sed filter for mapping
# of lexer state values, as they appear in debugging trace log files,
# back to their original state names.
#
vpath %.in   ${srcdir}
vpath %.map  ${srcdir}

state.map: psbblex.l psbblex.map.in
	$(MAKE) --no-print-directory psbblex.$@
	mv psbblex.$@ $@

%.state.map: %.l %.map.in
	$(MAKE) --no-print-directory $*.map
	echo "#! $(shell which sed) -f" > $@
	./$*.map >> $@ && chmod 755 $@
	$(RM) $*.map

%.map.lx: %.l
	sed -n -e '/^%x/{s/  */\n%x /g' -e 's/^%x\n//p' -e '}' $^ > $@

%.map.ls: %.map.lx
	sed -e 's/ *%x */  SHOW(/' -e 's/$$/);/' $< > $@

%.map.l: %.map.in %.map.ls
	sed $(STATE_MAP_SCRIPT) $< > $@

STATE_MAP_SCRIPT = -e '/@LEXER_STATE_MAP@/{r $@x' -e d -e '}' \
  -e '/@SED_FILTER_RULES@/{r $@s' -e d -e '}'


# Clean up rules
#
clean:; $(RM) *.o *.map psbb
realclean: clean
	$(RM) `echo *.l | sed 's,\.l,.c,g'` *.tab.* *.a