SED ?= sed

DESTDIR ?=
PREFIX ?= /usr/local
EXEC_PREFIX ?= $(PREFIX)
BINDIR ?= $(EXEC_PREFIX)/bin
LIBEXECDIR ?= $(EXEC_PREFIX)/libexec
DATAROOTDIR ?= $(PREFIX)/share
MANDIR ?= $(DATAROOTDIR)/man
BCDATADIR ?= $(DATAROOTDIR)/bc

BINS := dc/dc bc/bc
MAN1S := dc/dc.1 bc/bc.1
BCDATAS := bc/lib.b

.SUFFIXES:
.SUFFIXES: .c .o

.PHONY: all install uninstall clean distclean

all: $(BINS)

dc/dc: dc/dc.c dc/dc.h
	$(CC) -o $@ $(CFLAGS) $(CPPFLAGS) $< $(LDFLAGS)

bc/bc: bc/bc.c
	$(CC) -o $@ $(CFLAGS) $(CPPFLAGS) -DDC='"$(BINDIR)/dc"' -DLIBB='"$(BCDATADIR)/lib.b"' $< $(LDFLAGS)

bc/bc.c: bc/y.tab.c bc/yyval.sed
	$(SED) -f bc/yyval.sed $< > $@

bc/y.tab.c: bc/bc.y
	cd bc && $(YACC) bc.y

.c.o:
	$(CC) -c $(CFLAGS) $(CPPFLAGS) -o $@ $<

install: $(BINS) $(MAN1S) $(BCDATAS)
	install -D -m 755 -t '$(DESTDIR)$(BINDIR)' $(BINS)
	install -D -m 644 -t '$(DESTDIR)$(MANDIR)/man1' $(MAN1S)
	install -D -m 644 -t '$(DESTDIR)$(BCDATADIR)' $(BCDATAS)

uninstall:
	cd '$(DESTDIR)$(BINDIR)' && for i in $(BINS); do rm "$$(basename "$$i")"; done
	cd '$(DESTDIR)$(MANDIR)/man1' && for i in $(MAN1S); do rm "$$(basename "$$i")"; done
	cd '$(DESTDIR)$(BCDATADIR)' && for i in $(BCDATAS); do rm "$$(basename "$$i")"; done

clean:
	rm -f $(BINS) bc/y.tab.c bc/bc.c

distclean: clean