kernel compression with lzma

[Tobias Gasser]

kernel 2.26.30 allows compression with gz, bz2 and lzma

gzip and bzip2 are fine with the installed tools.
lzma is missing in the book.


first i downloaded the "original" lzma sdk mentionned on www.7-zip.org
but had no success.


next i tried http://tukaani.org/lzma
i took the current source lzma-4.32.7.tar.gz and used my standard
	configure --prefix=/usr --enable-shared
	make
	make install


to be complete, i tried the xz-4.99.8beta.tar.gz from tukaani too.
http://tukaani.org/xz
same procedure as with lzma


and that's it.

just get the right lzma tool...



my current kernel-sizes:
gzip		1913696
bzip2		1820944
lzma		1605712


lzma from both packages result in the same size.


even as the xz is stil beta, i propose to include the xz and not lzma in
the book to be able to compress the kernel with any method the user
wishes. (alphabetically after Vim as no dependecies exist)

maybe the tool can be marked as "optional, only required to compress the
kernel with lzma".

support for lzma in tar is with --lzma, for xz with -J (which used to be
lzma for a while...)


tobias