CC ?= gcc

PREFIX ?= /usr
BINDIR ?= $(PREFIX)/bin
MANDIR ?= $(PREFIX)/share/man/man1

PACKAGES = x11 xcomposite xfixes xdamage xrender xext
LIBS = -lm
INCS =

# Parse configuration flags
CFG =

ifeq "$(NO_LIBCONFIG)" ""
	CFG += -DCONFIG_LIBCONFIG
	PACKAGES += libconfig

	# libconfig-1.3* does not define LIBCONFIG_VER* macros, so we use
	# pkg-config to determine its version here
	CFG += $(shell pkg-config --atleast-version=1.4 libconfig || echo '-DCONFIG_LIBCONFIG_LEGACY')
endif

ifeq "$(NO_REGEX_PCRE)" ""
	CFG += -DCONFIG_REGEX_PCRE
	LIBS += $(shell pcre-config --libs)
	INCS += $(shell pcre-config --cflags)
	ifeq "$(NO_REGEX_PCRE_JIT)" ""
		CFG += -DCONFIG_REGEX_PCRE_JIT
	endif
endif

CFLAGS += $(CFG)

LIBS += $(shell pkg-config --libs $(PACKAGES))
INCS += $(shell pkg-config --cflags $(PACKAGES))
CFLAGS += -Wall -std=c99
OBJS = compton.o

%.o: src/%.c src/%.h
	$(CC) $(CFLAGS) $(INCS) -c src/$*.c

compton: $(OBJS)
	$(CC) $(LDFLAGS) $(CFLAGS) -o $@ $(OBJS) $(LIBS)

install: compton
	@install -Dm755 compton "$(DESTDIR)$(BINDIR)"/compton
	@install -Dm755 bin/compton-trans "$(DESTDIR)$(BINDIR)"/compton-trans
	@install -Dm644 man/compton.1 "$(DESTDIR)$(MANDIR)"/compton.1
	@install -Dm644 man/compton-trans.1 "$(DESTDIR)$(MANDIR)"/compton-trans.1

uninstall:
	@rm -f "$(DESTDIR)$(BINDIR)/compton"
	@rm -f "$(DESTDIR)$(BINDIR)/compton-trans"
	@rm -f "$(DESTDIR)$(MANDIR)/compton.1"
	@rm -f "$(DESTDIR)$(MANDIR)/compton-trans.1"

clean:
	@rm -f $(OBJS) compton

.PHONY: uninstall clean