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Sam Ravnborg 8ec4b4ff1c kbuild: introduce Kbuild.include

Kbuild.include is a placeholder for definitions originally present in
both the top-level Makefile and scripts/Makefile.build.
There were a slight difference in the filechk definition, so the most videly
used version was kept and usr/Makefile was adopted for this syntax.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
---

2005-07-25 20:10:36 +00:00

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obj-y := initramfs_data.o

hostprogs-y := gen_init_cpio

clean-files := initramfs_data.cpio.gz initramfs_list

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

ifdef CONFIG_INITRAMFS_ROOT_UID gen_initramfs_args += -u $(CONFIG_INITRAMFS_ROOT_UID) endif

ifdef CONFIG_INITRAMFS_ROOT_GID gen_initramfs_args += -g $(CONFIG_INITRAMFS_ROOT_GID) endif

The $(shell echo $(CONFIG_INITRAMFS_SOURCE)) is to remove the

gratuitous begin and end quotes from the Kconfig string type.

Internal, escaped quotes in the Kconfig string will loose the

escape and become active quotes.

quotefixed_initramfs_source := $(shell echo $(CONFIG_INITRAMFS_SOURCE))

filechk_initramfs_list = $(CONFIG_SHELL)
$(srctree)/scripts/gen_initramfs_list.sh $(gen_initramfs_args) $(quotefixed_initramfs_source)

$(obj)/initramfs_list: $(obj)/Makefile FORCE $(call filechk,initramfs_list)

quiet_cmd_cpio = CPIO $@ cmd_cpio = ./$< $(obj)/initramfs_list > $@

Check if the INITRAMFS_SOURCE is a cpio archive

ifneq (,$(findstring .cpio,$(quotefixed_initramfs_source)))

INITRAMFS_SOURCE has a cpio archive - verify that it's a single file

ifneq (1,$(words $(quotefixed_initramfs_source))) $(error Only a single file may be specified in CONFIG_INITRAMFS_SOURCE (="$(quotefixed_initramfs_source)") when a cpio archive is directly specified.) endif

Now use the cpio archive directly

initramfs_data_cpio = $(quotefixed_initramfs_source) targets += $(quotefixed_initramfs_source)

else

INITRAMFS_SOURCE is not a cpio archive - create one

$(obj)/initramfs_data.cpio: $(obj)/gen_init_cpio
$(initramfs-y) $(obj)/initramfs_list FORCE $(call if_changed,cpio)

targets += initramfs_data.cpio initramfs_data_cpio = $(obj)/initramfs_data.cpio

endif

$(obj)/initramfs_data.cpio.gz: $(initramfs_data_cpio) FORCE $(call if_changed,gzip)

targets += initramfs_data.cpio.gz

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