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The following build error for powerpc64 was reported by Nathan Chancellor:
"$ scripts/config --file arch/powerpc/configs/powernv_defconfig -e KERNEL_XZ
$ make -skj"$(nproc)" ARCH=powerpc CROSS_COMPILE=powerpc64le-linux- distclean powernv_defconfig zImage
...
In file included from arch/powerpc/boot/../../../lib/decompress_unxz.c:234,
from arch/powerpc/boot/decompress.c:38:
arch/powerpc/boot/../../../lib/xz/xz_dec_stream.c: In function 'dec_main':
arch/powerpc/boot/../../../lib/xz/xz_dec_stream.c:586:4: error: 'fallthrough' undeclared (first use in this function)
586 | fallthrough;
| ^~~~~~~~~~~
This will end up affecting distribution configurations such as Debian
and OpenSUSE according to my testing. I am not sure what the solution
is, the PowerPC wrapper does not set -D__KERNEL__ so I am not sure
that compiler_attributes.h can be safely included."
In order to avoid these sort of problems, it seems that the best
solution is to use /* fall through */ comments instead of the
fallthrough pseudo-keyword macro in lib/, for now.
Reported-by: Nathan Chancellor <natechancellor@gmail.com>
Fixes:
|
||
|---|---|---|
| .. | ||
| bitstream.h | ||
| compress.c | ||
| decompress.c | ||
| entropy_common.c | ||
| error_private.h | ||
| fse_compress.c | ||
| fse_decompress.c | ||
| fse.h | ||
| huf_compress.c | ||
| huf_decompress.c | ||
| huf.h | ||
| Makefile | ||
| mem.h | ||
| zstd_common.c | ||
| zstd_internal.h | ||
| zstd_opt.h | ||