| | 1 | # |
| | 2 | # kbuild file for usr/ - including initramfs image |
| | 3 | # |
| | 4 | |
| | 5 | klibcdirs:; |
| | 6 | PHONY += klibcdirs |
| | 7 | |
| | 8 | suffix_y = $(subst $\",,$(CONFIG_INITRAMFS_COMPRESSION)) |
| | 9 | datafile_y = initramfs_data.cpio$(suffix_y) |
| | 10 | AFLAGS_initramfs_data.o += -DINITRAMFS_IMAGE="usr/$(datafile_y)" |
| | 11 | |
| | 12 | |
| | 13 | # Generate builtin.o based on initramfs_data.o |
| | 14 | obj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data.o |
| | 15 | |
| | 16 | # initramfs_data.o contains the compressed initramfs_data.cpio image. |
| | 17 | # The image is included using .incbin, a dependency which is not |
| | 18 | # tracked automatically. |
| | 19 | $(obj)/initramfs_data.o: $(obj)/$(datafile_y) FORCE |
| | 20 | |
| | 21 | ##### |
| | 22 | # Generate the initramfs cpio archive |
| | 23 | |
| | 24 | hostprogs-y := gen_init_cpio |
| | 25 | initramfs := $(CONFIG_SHELL) $(srctree)/scripts/gen_initramfs_list.sh |
| | 26 | ramfs-input := $(if $(filter-out "",$(CONFIG_INITRAMFS_SOURCE)), \ |
| | 27 | $(shell echo $(CONFIG_INITRAMFS_SOURCE)),-d) |
| | 28 | ramfs-args := \ |
| | 29 | $(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \ |
| | 30 | $(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID)) |
| | 31 | |
| | 32 | # .initramfs_data.cpio.d is used to identify all files included |
| | 33 | # in initramfs and to detect if any files are added/removed. |
| | 34 | # Removed files are identified by directory timestamp being updated |
| | 35 | # The dependency list is generated by gen_initramfs.sh -l |
| | 36 | ifneq ($(wildcard $(obj)/.initramfs_data.cpio.d),) |
| | 37 | include $(obj)/.initramfs_data.cpio.d |
| | 38 | endif |
| | 39 | |
| | 40 | quiet_cmd_initfs = GEN $@ |
| | 41 | cmd_initfs = $(initramfs) -o $@ $(ramfs-args) $(ramfs-input) |
| | 42 | |
| | 43 | targets := $(datafile_y) |
| | 44 | |
| | 45 | # do not try to update files included in initramfs |
| | 46 | $(deps_initramfs): ; |
| | 47 | |
| | 48 | $(deps_initramfs): klibcdirs |
| | 49 | # We rebuild initramfs_data.cpio if: |
| | 50 | # 1) Any included file is newer then initramfs_data.cpio |
| | 51 | # 2) There are changes in which files are included (added or deleted) |
| | 52 | # 3) If gen_init_cpio are newer than initramfs_data.cpio |
| | 53 | # 4) arguments to gen_initramfs.sh changes |
| | 54 | $(obj)/$(datafile_y): $(obj)/gen_init_cpio $(deps_initramfs) klibcdirs |
| | 55 | $(Q)$(initramfs) -l $(ramfs-input) > $(obj)/.initramfs_data.cpio.d |
| | 56 | $(call if_changed,initfs) |
projects / mirror_ubuntu-artful-kernel.git / blame_incremental