PREFIX ?= /usr/local
BINDIR ?= /bin

MAKEFLAGS += --no-builtin-rules

# GCC 7: -Wstringop-overflow=, -Walloc-size-larger-than=, -Wduplicated-{branches,cond}
WARNINGS := -Wall -Wextra -Wpedantic -Wformat=2 -Wstrict-aliasing=3 -Wstrict-overflow=3 -Wstack-usage=12500 \
	-Wfloat-equal -Wcast-align -Wpointer-arith -Wchar-subscripts -Warray-bounds=2

override CFLAGS ?= -g -O2 $(WARNINGS)
override CFLAGS += -std=c11
override CPPFLAGS ?= -D_FORTIFY_SOURCE=2
override CPPFLAGS += -Isrc

bins = escpos2raster starpbm
all: $(bins)

%.c: %.rl
	ragel $^

%.a:
	$(LINK.c) -c $(filter %.c,$^) $(LDLIBS) -o $@

$(bins): %:
	$(LINK.c) $(filter %.c %.a,$^) $(LDLIBS) -o $@

escpos-membuf.a: src/escpos/memory.h src/util/membuf.h src/util/membuf.c
escpos-ragel.a: src/util/ragel/ragel.h src/util/ragel/ragel.c
escpos-stack.a: src/escpos/stack.h src/escpos/stack.c
escpos-parser.a: src/escpos/parser.h src/escpos/parser.c src/escpos/utf8.h escpos-stack.a
escpos2raster: src/bin/escpos2raster.c escpos-membuf.a escpos-ragel.a escpos-stack.a escpos-parser.a

starpbm: src/bin/starpbm.c

install-bin: $(bins)
	install -Dm755 $^ -t "$(DESTDIR)$(PREFIX)$(BINDIR)"

install: install-bin

clean:
	$(RM) src/util/ragel/ragel.c src/escpos/stack.c src/escpos/parser.c
	$(RM) $(bins) *.a

.PHONY: all clean install