#############################################################
#
# genext2fs to build to target ext2 filesystems
#
#############################################################
GENEXT2_DIR=$(BUILD_DIR)/genext2fs-1.3
GENEXT2_SOURCE=genext2fs_1.3.orig.tar.gz
GENEXT2_SITE=http://ftp.debian.org/debian/pool/main/g/genext2fs

$(DL_DIR)/$(GENEXT2_SOURCE):
	$(WGET) -P $(DL_DIR) $(GENEXT2_SITE)/$(GENEXT2_SOURCE)

$(GENEXT2_DIR)/.unpacked: $(DL_DIR)/$(GENEXT2_SOURCE)
	zcat $(DL_DIR)/$(GENEXT2_SOURCE) | tar -C $(BUILD_DIR) -xvf -
	mv $(GENEXT2_DIR).orig $(GENEXT2_DIR)
	toolchain/patch-kernel.sh $(GENEXT2_DIR) target/ext2/ genext2fs*.patch
	touch $(GENEXT2_DIR)/.unpacked

$(GENEXT2_DIR)/.configured: $(GENEXT2_DIR)/.unpacked
	chmod a+x $(GENEXT2_DIR)/configure
	(cd $(GENEXT2_DIR); rm -rf config.cache; \
		./configure \
		--prefix=$(STAGING_DIR) \
	);
	touch  $(GENEXT2_DIR)/.configured

$(GENEXT2_DIR)/genext2fs: $(GENEXT2_DIR)/.configured
	$(MAKE) CFLAGS="-Wall -O2 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE \
		-D_FILE_OFFSET_BITS=64" -C $(GENEXT2_DIR);
	touch -c $(GENEXT2_DIR)/genext2fs

genext2fs: $(GENEXT2_DIR)/genext2fs



#############################################################
#
# Build the ext2 root filesystem image
#
#############################################################

# How much KB we want to add to the calculated size for slack space
GENEXT2_REALSIZE=$(subst total,, $(shell LANG=C du $(TARGET_DIR) -s -c -k | grep total ))
GENEXT2_ADDTOROOTSIZE=$(shell if [ $(GENEXT2_REALSIZE) -ge 20000 ] ; then echo 16384; else echo 16; fi)
GENEXT2_SIZE=$(shell expr $(GENEXT2_REALSIZE) + $(GENEXT2_ADDTOROOTSIZE) + 200)
# We currently add about 400 device nodes, so add that into the total
GENEXT2_INODES=$(shell expr $(shell find $(TARGET_DIR) | wc -l) + 400)
#GENEXT2_SIZE=100000

EXT2_OPTS := 

ifeq ($(strip $(BR2_TARGET_ROOTFS_EXT2_BLOCKS)),0)
EXT2_OPTS += -b $(GENEXT2_SIZE)
else
EXT2_OPTS += -b $(strip $(BR2_TARGET_ROOTFS_EXT2_BLOCKS))
endif

ifeq ($(strip $(BR2_TARGET_ROOTFS_EXT2_INODES)),0)
EXT2_OPTS += -i $(GENEXT2_INODES)
else
EXT2_OPTS += -i $(strip $(BR2_TARGET_ROOTFS_EXT2_INODES))
endif

ifeq ($(strip $(BR2_TARGET_ROOTFS_EXT2_SQUASH)),y)
EXT2_OPTS += -q
endif

ifneq ($(strip $(BR2_TARGET_ROOTFS_EXT2_RESBLKS)),0)
EXT2_OPTS += -r $(strip $(BR2_TARGET_ROOTFS_EXT2_RESBLKS))
endif

EXT2_DEVFILE := $(strip $(subst ",,$(BR2_TARGET_ROOTFS_EXT2_DEVFILE)))
ifneq ($(EXT2_DEVFILE),)
EXT2_OPTS += -D $(EXT2_DEVFILE)
endif

EXT2_BASE :=	$(subst ",,$(BR2_TARGET_ROOTFS_EXT2_OUTPUT))

ifeq ($(strip $(BR2_TARGET_ROOTFS_EXT2_GZ)),y)
EXT2_TARGET := $(EXT2_BASE).gz
else
EXT2_TARGET := $(EXT2_BASE)
endif

$(EXT2_BASE): genext2fs
	-@find $(TARGET_DIR) -type f -perm +111 | xargs $(STRIP) 2>/dev/null || true;
	@rm -rf $(TARGET_DIR)/usr/man
	@rm -rf $(TARGET_DIR)/usr/share/man
	@rm -rf $(TARGET_DIR)/usr/info
	$(GENEXT2_DIR)/genext2fs \
		-d $(TARGET_DIR) \
		$(EXT2_OPTS) \
		$(EXT2_BASE)
		
$(EXT2_BASE).gz: $(EXT2_BASE)
	@gzip --best -fv $(EXT2_BASE)
	
EXT2_COPYTO := $(strip $(subst ",,$(BR2_TARGET_ROOTFS_EXT2_COPYTO)))
	
ext2root: $(EXT2_TARGET)
	@ls -l $(EXT2_TARGET)
ifneq ($(EXT2_COPYTO),)
	@cp -f $(EXT2_TARGET) $(EXT2_COPYTO)
endif	

ext2root-source: $(DL_DIR)/$(GENEXT2_SOURCE)

ext2root-clean:
	-$(MAKE) -C $(GENEXT2_DIR) clean

ext2root-dirclean:
	rm -rf $(GENEXT2_DIR)

#############################################################
#
# Toplevel Makefile options
#
#############################################################
ifeq ($(strip $(BR2_TARGET_ROOTFS_EXT2)),y)
TARGETS+=ext2root
endif