PREFIX=/usr
INSTALL=install
CFLAGS+=-std=gnu99 -O2 -g -flto -MMD -Wall			\
	-Wno-unused-but-set-variable				\
	-Wno-pointer-sign					\
	-fno-strict-aliasing					\
	-I. -Iinclude -Ilibbcache				\
	-D_FILE_OFFSET_BITS=64					\
	-D_GNU_SOURCE						\
	-D_LGPL_SOURCE						\
	-DRCU_MEMBARRIER					\
	$(EXTRA_CFLAGS)
LDFLAGS+=-O2 -g -flto

PKGCONFIG_LIBS="blkid uuid liburcu"
CFLAGS+=`pkg-config --cflags	${PKGCONFIG_LIBS}`
LDLIBS+=`pkg-config --libs	${PKGCONFIG_LIBS}` -lm -lpthread -lrt

ifeq ($(PREFIX),/usr)
	ROOT_SBINDIR=/sbin
else
	ROOT_SBINDIR=$(PREFIX)/sbin
endif

.PHONY: all
all: bcache

CCANSRCS=$(wildcard ccan/*/*.c)
CCANOBJS=$(patsubst %.c,%.o,$(CCANSRCS))

# Linux kernel shim:
LINUX_SRCS=$(wildcard linux/*.c linux/*/*.c)
LINUX_OBJS=$(LINUX_SRCS:.c=.o)

OBJS=bcache.o bcache-assemble.o bcache-device.o bcache-format.o	\
	bcache-fs.o bcache-run.o bcache-userspace-shim.o	\
	libbcache.o tools-util.o $(LINUX_OBJS) $(CCANOBJS)

DEPS=$(OBJS:.o=.d)
-include $(DEPS)

bcache: $(OBJS)

.PHONY: install
install: bcache
	mkdir -p $(DESTDIR)$(ROOT_SBINDIR)
	mkdir -p $(DESTDIR)$(PREFIX)/share/man/man8/
	$(INSTALL) -m0755 bcache	$(DESTDIR)$(ROOT_SBINDIR)
	$(INSTALL) -m0755 mkfs.bcache	$(DESTDIR)$(ROOT_SBINDIR)
	$(INSTALL) -m0644 bcache.8	$(DESTDIR)$(PREFIX)/share/man/man8/

.PHONY: clean
clean:
	$(RM) bcache $(OBJS) $(DEPS)

.PHONY: deb
deb: all
	debuild --unsigned-source	\
		--unsigned-changes	\
		--no-pre-clean		\
		--build=binary		\
		--diff-ignore		\
		--tar-ignore

.PHONE: update-bcache-sources
update-bcache-sources:
	echo BCACHE_REVISION=`cd $(LINUX_DIR); git rev-parse HEAD` > .bcache_revision
	cp $(LINUX_DIR)/drivers/md/bcache/*.[ch] libbcache/
	cp $(LINUX_DIR)/include/trace/events/bcache.h include/trace/events/
	cp $(LINUX_DIR)/include/uapi/linux/bcache.h include/linux/
	cp $(LINUX_DIR)/include/uapi/linux/bcache-ioctl.h include/linux/