libdeflate is currently intentionally being fetched via GIT.
However, with the move to using ZSTD to compress the cloned GIT repo
tarballs it means that we would first need to compile ZSTD.
But that means that we need to be able to unpack gzipped tarballs first
which we currently do by using libdeflate-gzip.
So, in order to do so lets fetch libdeflate as a tarball, use gzip to
extract it and then use libdeflate as regular for all other tools.
Signed-off-by: Robert Marko <robimarko@gmail.com>
CMake depends on (libdeflate-)gunzip, libdeflate depends on Cmake, so we
can't win.
Luckily libdeflate is _very_ easy to build, without any build system, so
lets just manually compile it and be done with it.
Signed-off-by: Olliver Schinagl <oliver@schinagl.nl>
Signed-off-by: Rosen Penev <rosenp@gmail.com>
Several devices provide U-Boot versions with only gzip compressed kernel
support (e.g. Realtek switches). This compression method produces larger
images than lzma. To save space on flash and avoid going the hard way with
lzma-loader we can make use of enhanced gzip tool based on libdeflate
compression library from https://github.com/ebiggers/libdeflate. It
keeps 100% deflate/gzip compatibility while improving compression ratio.
The image can be unpacked by the default inflate routines inside U-Boot.
Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
[Switched to v1.15 and made it work with cmake]
Signed-off-by: Olliver Schinagl <oliver@schinagl.nl>
Reviewed-by: Robert Marko <robimarko@gmail.com>
Reviewed-by: Rosen Penev <rosenp@gmail.com>
Reviewed-by: Sander Vanheule <sander@svanheule.net>
