[net-next-2.6.git] / usr / Makefile

#
# kbuild file for usr/ - including initramfs image
#

klibcdirs:;
PHONY += klibcdirs


# Generate builtin.o based on initramfs_data.o
obj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data.o

# initramfs_data.o contains the initramfs_data.cpio.gz image.
# The image is included using .incbin, a dependency which is not
# tracked automatically.
$(obj)/initramfs_data.o: $(obj)/initramfs_data.cpio.gz FORCE

#####
# Generate the initramfs cpio archive

hostprogs-y := gen_init_cpio
initramfs   := $(CONFIG_SHELL) $(srctree)/scripts/gen_initramfs_list.sh
ramfs-input := $(if $(filter-out "",$(CONFIG_INITRAMFS_SOURCE)), \
			$(shell echo $(CONFIG_INITRAMFS_SOURCE)),-d)
ramfs-args  := \
        $(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \
        $(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID))

# .initramfs_data.cpio.gz.d is used to identify all files included
# in initramfs and to detect if any files are added/removed.
# Removed files are identified by directory timestamp being updated
# The dependency list is generated by gen_initramfs.sh -l
ifneq ($(wildcard $(obj)/.initramfs_data.cpio.gz.d),)
	include $(obj)/.initramfs_data.cpio.gz.d
endif

quiet_cmd_initfs = GEN     $@
      cmd_initfs = $(initramfs) -o $@ $(ramfs-args) $(ramfs-input)

targets := initramfs_data.cpio.gz
# do not try to update files included in initramfs
$(deps_initramfs): ;

$(deps_initramfs): klibcdirs
# We rebuild initramfs_data.cpio.gz if:
# 1) Any included file is newer then initramfs_data.cpio.gz
# 2) There are changes in which files are included (added or deleted)
# 3) If gen_init_cpio are newer than initramfs_data.cpio.gz
# 4) arguments to gen_initramfs.sh changes
$(obj)/initramfs_data.cpio.gz: $(obj)/gen_init_cpio $(deps_initramfs) klibcdirs
	$(Q)$(initramfs) -l $(ramfs-input) > $(obj)/.initramfs_data.cpio.gz.d
	$(call if_changed,initfs)
Commit	Line	Data
	1	#
	2	# kbuild file for usr/ - including initramfs image
	3	#
	4
	5	klibcdirs:;
	6	PHONY += klibcdirs
	7
	8
	9	# Generate builtin.o based on initramfs_data.o
	10	obj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data.o
	11
	12	# initramfs_data.o contains the initramfs_data.cpio.gz image.
	13	# The image is included using .incbin, a dependency which is not
	14	# tracked automatically.
	15	$(obj)/initramfs_data.o: $(obj)/initramfs_data.cpio.gz FORCE
	16
	17	#####
	18	# Generate the initramfs cpio archive
	19
	20	hostprogs-y := gen_init_cpio
	21	initramfs := $(CONFIG_SHELL) $(srctree)/scripts/gen_initramfs_list.sh
	22	ramfs-input := $(if $(filter-out "",$(CONFIG_INITRAMFS_SOURCE)), \
	23	$(shell echo $(CONFIG_INITRAMFS_SOURCE)),-d)
	24	ramfs-args := \
	25	$(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \
	26	$(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID))
	27
	28	# .initramfs_data.cpio.gz.d is used to identify all files included
	29	# in initramfs and to detect if any files are added/removed.
	30	# Removed files are identified by directory timestamp being updated
	31	# The dependency list is generated by gen_initramfs.sh -l
	32	ifneq ($(wildcard $(obj)/.initramfs_data.cpio.gz.d),)
	33	include $(obj)/.initramfs_data.cpio.gz.d
	34	endif
	35
	36	quiet_cmd_initfs = GEN $@
	37	cmd_initfs = $(initramfs) -o $@ $(ramfs-args) $(ramfs-input)
	38
	39	targets := initramfs_data.cpio.gz
	40	# do not try to update files included in initramfs
	41	$(deps_initramfs): ;
	42
	43	$(deps_initramfs): klibcdirs
	44	# We rebuild initramfs_data.cpio.gz if:
	45	# 1) Any included file is newer then initramfs_data.cpio.gz
	46	# 2) There are changes in which files are included (added or deleted)
	47	# 3) If gen_init_cpio are newer than initramfs_data.cpio.gz
	48	# 4) arguments to gen_initramfs.sh changes
	49	$(obj)/initramfs_data.cpio.gz: $(obj)/gen_init_cpio $(deps_initramfs) klibcdirs
	50	$(Q)$(initramfs) -l $(ramfs-input) > $(obj)/.initramfs_data.cpio.gz.d
	51	$(call if_changed,initfs)
	52