Dear Stable Kernel Maintainers,
Please consider applying the attached mbox file to v5.10.y.
For Android's T release in 2022, I'd like to verify whether clang's
integrated assembler was used. For the compiler and linker, they both
embed a string in object file that can be read via:
$ llvm-readelf -p .comment <object file>
String dump of section '.comment':
[ 0] Linker: LLD 14.0.0
[ 13] clang version 14.0.0 (git@xxxxxxxxxx:llvm/llvm-project.git
2ff26d0e794ab7300d94051f91be7da274cc348e)
Unfortunately, the assembler version is not also embedded. Instead,
I'd like to check for the presence of AS_IS_LLVM in .config. This
series helps move some toolchain version checking from build time to
configure time, though that's only a modest improvement and I don't
_have_ to check this config.
The mbox contains the following 7 commits:
1. commit 052c805a1851 ("kbuild: LD_VERSION redenomination")
2. commit aec6c60a01d3 ("kbuild: check the minimum compiler version in Kconfig")
3. commit 02aff8592204 ("kbuild: check the minimum linker version in Kconfig")
4. commit 1f09af062556 ("kbuild: Fix ld-version.sh script if LLD was
built with LLD_VENDOR")
5. commit bcbcf50f5218 ("kbuild: fix ld-version.sh to not be affected
by locale")
6. commit e24b3ffcf421 ("kbuild: collect minimum tool versions into
scripts/min-tool-version.sh")
7. commit ba64beb17493 ("kbuild: check the minimum assembler version
in Kconfig")
They landed respectively upstream in:
1. v5.12-rc1
2. v5.12-rc1
3. v5.12-rc1
4. v5.12-rc3
5. v5.12-rc3
6. v5.13-rc1
7. v5.13-rc1
I needed to manually resolve conflicts in the respective patches:
1. N/A
2. N/A
3. scripts/lld-version.sh due to df58fb431aa3
("scripts/lld-version.sh: Rewrite based on upstream ld-version.sh")
being 5.10 only. This file is removed regardless of what it looks
like.
4. N/A
5. N/A
6. N/A
7. arch/Kconfig due to missing dc5723b02e523 ("kbuild: add support for
Clang LTO") which landed in v5.12-rc1.
These conflicts are also noted in the commit messages of the commits
in the mbox.
--
Thanks,
~Nick Desaulniers
Attachment:
5_10_AS_IS_LLVM.mbox
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