53 lines
1.8 KiB
Makefile
53 lines
1.8 KiB
Makefile
#
|
|
# kbuild file for usr/ - including initramfs image
|
|
#
|
|
|
|
klibcdirs:;
|
|
PHONY += klibcdirs
|
|
|
|
|
|
# Generate builtin.o based on initramfs_data.o
|
|
obj-y := 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)), \
|
|
$(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)
|
|
|