GITREV  ?= $(shell git describe --dirty --always)
BLDDATE ?= $(shell date -I)
CR_YEAR ?= $(shell date +%Y)
VERSION ?= "v0.2.1"

CFLAGS ?= -Wall -Wextra -Wpedantic -O2 -std=gnu99
CFLAGS += -DGITREV='"$(GITREV)"'
CFLAGS += -DBLDDATE='"$(BLDDATE)"'
CFLAGS += -DCR_YEAR='"$(CR_YEAR)"'
CFLAGS += -DVERSION='$(VERSION)'
CFLAGS += $(EXTRA_CFLAGS)

# Soon...
# CFLAGS += $(shell pkg-config --cflags libudev)
# LIBS   += $(shell pkg-config --libs libudev)

PREFIX ?= /usr/local
DESTDIR ?=

writeimg: writeimg.c
	$(CC) $(CFLAGS) $(LDFLAGS) $(LIBS) -o $@ $^

clean:
	rm -f *.o writeimg

install: writeimg
	install -d $(DESTDIR)$(PREFIX)/bin
	install -m 0755 $< $(DESTDIR)$(PREFIX)/bin/$<