projects/linux·blob v2.6.13 · refs

65 lines · 2.0 KiB

1
2obj-y := initramfs_data.o
3
4hostprogs-y := gen_init_cpio
5
6clean-files := initramfs_data.cpio.gz initramfs_list
7
8# initramfs_data.o contains the initramfs_data.cpio.gz image.
9# The image is included using .incbin, a dependency which is not
10# tracked automatically.
11$(obj)/initramfs_data.o: $(obj)/initramfs_data.cpio.gz FORCE
12
13ifdef CONFIG_INITRAMFS_ROOT_UID
14gen_initramfs_args += -u $(CONFIG_INITRAMFS_ROOT_UID)
15endif
16
17ifdef CONFIG_INITRAMFS_ROOT_GID
18gen_initramfs_args += -g $(CONFIG_INITRAMFS_ROOT_GID)
19endif
20
21# The $(shell echo $(CONFIG_INITRAMFS_SOURCE)) is to remove the
22# gratuitous begin and end quotes from the Kconfig string type.
23# Internal, escaped quotes in the Kconfig string will loose the
24# escape and become active quotes.
25quotefixed_initramfs_source := $(shell echo $(CONFIG_INITRAMFS_SOURCE))
26
27filechk_initramfs_list = $(CONFIG_SHELL) \
28 $(srctree)/scripts/gen_initramfs_list.sh $(gen_initramfs_args) $(quotefixed_initramfs_source)
29
30$(obj)/initramfs_list: FORCE
31 $(call filechk,initramfs_list)
32
33quiet_cmd_cpio = CPIO $@
34 cmd_cpio = ./$< $(obj)/initramfs_list > $@
35
36
37# Check if the INITRAMFS_SOURCE is a cpio archive
38ifneq (,$(findstring .cpio,$(quotefixed_initramfs_source)))
39
40# INITRAMFS_SOURCE has a cpio archive - verify that it's a single file
41ifneq (1,$(words $(quotefixed_initramfs_source)))
42$(error Only a single file may be specified in CONFIG_INITRAMFS_SOURCE (="$(quotefixed_initramfs_source)") when a cpio archive is directly specified.)
43endif
44# Now use the cpio archive directly
45initramfs_data_cpio = $(quotefixed_initramfs_source)
46targets += $(quotefixed_initramfs_source)
47
48else
49
50# INITRAMFS_SOURCE is not a cpio archive - create one
51$(obj)/initramfs_data.cpio: $(obj)/gen_init_cpio \
52 $(initramfs-y) $(obj)/initramfs_list FORCE
53 $(call if_changed,cpio)
54
55targets += initramfs_data.cpio
56initramfs_data_cpio = $(obj)/initramfs_data.cpio
57
58endif
59
60
61$(obj)/initramfs_data.cpio.gz: $(initramfs_data_cpio) FORCE
62 $(call if_changed,gzip)
63
64targets += initramfs_data.cpio.gz
65