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bzip2/lzma: make internal initramfs compression configurable

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Impact: Avoids silent environment dependency

Make builtin initramfs compression an explicit configurable.  The
previous version would pick a compression based on the binaries which
were installed on the system, which could lead to unexpected results.
It is now explicitly configured, and not having the appropriate
binaries installed on the build host is simply an error.

Signed-off-by: Alain Knaff <[email protected]>
Signed-off-by: H. Peter Anvin <[email protected]>
This commit is contained in:
Alain Knaff 2009-02-19 13:43:51 -08:00 • committed by H. Peter Anvin
commit ab76f3d771
2 changed files with 68 additions and 12 deletions
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18
usr/Makefile
View file

@ -5,24 +5,18 @@
klibcdirs:;
PHONY += klibcdirs
# Find out "preferred" ramdisk compressor. Order of preference is
# 1. bzip2 efficient, and likely to be present
# 2. gzip former default
# 3. lzma
# 4. none
# None of the above
suffix_y =
# Lzma, but no gzip nor bzip2
suffix_$(CONFIG_RD_LZMA) = .lzma
# No compression
suffix_$(CONFIG_INITRAMFS_COMPRESSION_NONE) =
# Gzip, but no bzip2
suffix_$(CONFIG_RD_GZIP) = .gz
suffix_$(CONFIG_INITRAMFS_COMPRESSION_GZIP) = .gz
# Bzip2
suffix_$(CONFIG_RD_BZIP2) = .bz2
suffix_$(CONFIG_INITRAMFS_COMPRESSION_BZIP2) = .bz2
# Lzma
suffix_$(CONFIG_INITRAMFS_COMPRESSION_LZMA) = .lzma
# Generate builtin.o based on initramfs_data.o
obj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data$(suffix_y).o