Linux kernel supports to compress its output binary with lzma algorithm and
U-Boot support to decompress lzma compressed image.
Both xz and lzma algorithms are identical and users can use xz utility with
format parameter to compress Image which supports lzma algorithm.
Add the following command to support lzma. This command is refer to Linux
kernel, https://github.com/torvalds/linux/blob/master/arch/powerpc/boot/wrapper
"xz --format=lzma -f -6 linux.bin"
(From OE-Core rev: 211178065bdca293c84c41a9a1e79c10df95b6ad)
Signed-off-by: Jamin Lin <jamin_lin@aspeedtech.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This helps in switching toolchains cleanly for kernel build
between gcc and clang
Currently, some kernels allow building with clang but not all
the distro might use clang as default system compiler but kernel
may demand gcc which is provided via KERNEL_* variables, however
kernel does use OBJCOPY at places during build and it maybe set
to use llvm objcopy when using clang. That should be a deliberate
setting when clang is used for kernel as well, otherwise it should
use binutils provided objcopy
(From OE-Core rev: 17b409f2fd97894e0943d13c2cb0d52abde647e3)
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Cc: Bruce Ashfield <bruce.ashfield@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Move classes to classes-global or classes-recipe as appropriate to take
advantage of new bitbake functionality to check class scope/usage.
(From OE-Core rev: f5c128008365e141082c129417eb72d2751e8045)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
