]>
Commit | Line | Data |
---|---|---|
d39a206b SR |
1 | # |
2 | # kbuild file for usr/ - including initramfs image | |
3 | # | |
1da177e4 | 4 | |
d39a206b | 5 | klibcdirs:; |
48f1f058 SR |
6 | PHONY += klibcdirs |
7 | ||
1da177e4 | 8 | |
d39a206b SR |
9 | # Generate builtin.o based on initramfs_data.o |
10 | obj-y := initramfs_data.o | |
1da177e4 LT |
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 | ||
d39a206b SR |
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 | $(CONFIG_INITRAMFS_SOURCE),-d) | |
24 | ramfs-args := \ | |
25 | $(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \ | |
ff541710 | 26 | $(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID)) |
d39a206b SR |
27 | |
28 | # .initramfs_data.cpio.gz.d is used to identify all files included | |
29 | # in initramfs and to detect if any files are added/removed. | |
30 | # Removed files are identified by directory timestamp being updated | |
31 | # The dependency list is generated by gen_initramfs.sh -l | |
32 | ifneq ($(wildcard $(obj)/.initramfs_data.cpio.gz.d),) | |
33 | include $(obj)/.initramfs_data.cpio.gz.d | |
1da177e4 LT |
34 | endif |
35 | ||
d39a206b SR |
36 | quiet_cmd_initfs = GEN $@ |
37 | cmd_initfs = $(initramfs) -o $@ $(ramfs-args) $(ramfs-input) | |
38 | ||
39 | targets := initramfs_data.cpio.gz | |
58a2f7d8 SR |
40 | # do not try to update files included in initramfs |
41 | $(deps_initramfs): ; | |
42 | ||
d39a206b SR |
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) | |
1da177e4 | 52 |