Sam Ravnborg | d39a206 | 2006-04-11 13:24:32 +0200 | [diff] [blame] | 1 | # |
| 2 | # kbuild file for usr/ - including initramfs image |
| 3 | # |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | |
Sam Ravnborg | d39a206 | 2006-04-11 13:24:32 +0200 | [diff] [blame] | 5 | klibcdirs:; |
Sam Ravnborg | 48f1f05 | 2006-07-23 19:37:44 +0200 | [diff] [blame^] | 6 | PHONY += klibcdirs |
| 7 | |
Sam Ravnborg | d39a206 | 2006-04-11 13:24:32 +0200 | [diff] [blame] | 8 | |
| 9 | # Generate builtin.o based on initramfs_data.o |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | obj-y := initramfs_data.o |
| 11 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Sam Ravnborg | d39a206 | 2006-04-11 13:24:32 +0200 | [diff] [blame] | 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)) \ |
Nickolay | ff54171 | 2006-06-09 21:24:14 +0400 | [diff] [blame] | 26 | $(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID)) |
Sam Ravnborg | d39a206 | 2006-04-11 13:24:32 +0200 | [diff] [blame] | 27 | |
| 28 | # .initramfs_data.cpio.gz.d is used to identify all files included |
| 29 | # in initramfs and to detect if any files are added/removed. |
| 30 | # Removed files are identified by directory timestamp being updated |
| 31 | # The dependency list is generated by gen_initramfs.sh -l |
| 32 | ifneq ($(wildcard $(obj)/.initramfs_data.cpio.gz.d),) |
| 33 | include $(obj)/.initramfs_data.cpio.gz.d |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | endif |
| 35 | |
Sam Ravnborg | d39a206 | 2006-04-11 13:24:32 +0200 | [diff] [blame] | 36 | quiet_cmd_initfs = GEN $@ |
| 37 | cmd_initfs = $(initramfs) -o $@ $(ramfs-args) $(ramfs-input) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | |
Sam Ravnborg | d39a206 | 2006-04-11 13:24:32 +0200 | [diff] [blame] | 39 | targets := initramfs_data.cpio.gz |
Sam Ravnborg | 58a2f7d | 2006-08-07 20:58:28 +0200 | [diff] [blame] | 40 | # do not try to update files included in initramfs |
| 41 | $(deps_initramfs): ; |
| 42 | |
Sam Ravnborg | d39a206 | 2006-04-11 13:24:32 +0200 | [diff] [blame] | 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) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |