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a26ee60f90
Impact: Resolves build failures in some configurations Makes it possible to disable CONFIG_RD_GZIP . In that case, the built-in initramfs will be compressed by whatever compressor is available (bzip2 or lzma) or left uncompressed if none is available. It also removes a couple of warnings which occur when no ramdisk compression at all is chosen. It also restores the select ZLIB_INFLATE in drivers/block/Kconfig which somehow came missing. This is needed to activate compilation of the stuff in zlib_deflate. Signed-off-by: Alain Knaff <alain@knaff.lu> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
71 lines
2.3 KiB
Makefile
71 lines
2.3 KiB
Makefile
#
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# kbuild file for usr/ - including initramfs image
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#
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klibcdirs:;
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PHONY += klibcdirs
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# Find out "preferred" ramdisk compressor. Order of preference is
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# 1. bzip2 efficient, and likely to be present
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# 2. gzip former default
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# 3. lzma
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# 4. none
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# None of the above
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suffix_y =
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# Lzma, but no gzip nor bzip2
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suffix_$(CONFIG_RD_LZMA) = .lzma
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# Gzip, but no bzip2
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suffix_$(CONFIG_RD_GZIP) = .gz
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# Bzip2
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suffix_$(CONFIG_RD_BZIP2) = .bz2
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# Generate builtin.o based on initramfs_data.o
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obj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data$(suffix_y).o
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# initramfs_data.o contains the compressed initramfs_data.cpio image.
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# The image is included using .incbin, a dependency which is not
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# tracked automatically.
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$(obj)/initramfs_data$(suffix_y).o: $(obj)/initramfs_data.cpio$(suffix_y) FORCE
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#####
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# Generate the initramfs cpio archive
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hostprogs-y := gen_init_cpio
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initramfs := $(CONFIG_SHELL) $(srctree)/scripts/gen_initramfs_list.sh
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ramfs-input := $(if $(filter-out "",$(CONFIG_INITRAMFS_SOURCE)), \
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$(shell echo $(CONFIG_INITRAMFS_SOURCE)),-d)
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ramfs-args := \
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$(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \
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$(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID))
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# .initramfs_data.cpio.d is used to identify all files included
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# in initramfs and to detect if any files are added/removed.
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# Removed files are identified by directory timestamp being updated
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# The dependency list is generated by gen_initramfs.sh -l
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ifneq ($(wildcard $(obj)/.initramfs_data.cpio.d),)
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include $(obj)/.initramfs_data.cpio.d
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endif
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quiet_cmd_initfs = GEN $@
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cmd_initfs = $(initramfs) -o $@ $(ramfs-args) $(ramfs-input)
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targets := initramfs_data.cpio.gz initramfs_data.cpio.bz2 initramfs_data.cpio.lzma initramfs_data.cpio
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# do not try to update files included in initramfs
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$(deps_initramfs): ;
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$(deps_initramfs): klibcdirs
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# We rebuild initramfs_data.cpio if:
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# 1) Any included file is newer then initramfs_data.cpio
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# 2) There are changes in which files are included (added or deleted)
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# 3) If gen_init_cpio are newer than initramfs_data.cpio
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# 4) arguments to gen_initramfs.sh changes
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$(obj)/initramfs_data.cpio$(suffix_y): $(obj)/gen_init_cpio $(deps_initramfs) klibcdirs
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$(Q)$(initramfs) -l $(ramfs-input) > $(obj)/.initramfs_data.cpio.d
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$(call if_changed,initfs)
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