linux-kernel - clang: error: unsupported argument '-mimplicit-it=always' to option 'Wa,'

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Date:   Thu, 16 Sep 2021 19:15:04 +0530
From:   Naresh Kamboju <naresh.kamboju@...aro.org>
To:     open list <linux-kernel@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Sasha Levin <sashal@...nel.org>,
        clang-built-linux <clang-built-linux@...glegroups.com>,
        lkft-triage@...ts.linaro.org, llvm@...ts.linux.dev,
        Linux-Next Mailing List <linux-next@...r.kernel.org>
Cc:     Nathan Chancellor <natechancellor@...il.com>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Stephen Rothwell <sfr@...b.auug.org.au>
Subject: clang: error: unsupported argument '-mimplicit-it=always' to option 'Wa,'

Following build warnings/ errors noticed while building linux next-20210916
with clang-10, clang-11 and clang-12  for arm architecture.
      - allnoconfig
      - tinyconfig

But builds PASS with clang-13.

clang: error: unsupported argument '-mimplicit-it=always' to option 'Wa,'
make[2]: *** [/builds/linux/scripts/Makefile.build:288:
scripts/mod/empty.o] Error 1
make[2]: Target '__build' not remade because of errors.
make[1]: *** [/builds/linux/Makefile:1329: prepare0] Error 2
make[1]: Target '__all' not remade because of errors.
make: *** [Makefile:226: __sub-make] Error 2
make: Target '__all' not remade because of errors.

Build config:
https://builds.tuxbuild.com/1yDgHTBClkDVAW6MLcYwAdsXznO/config

Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>

meta data:
--------------
    git_describe: next-20210916
    git_ref: master
    git_repo: https://gitlab.com/Linaro/lkft/mirrors/next/linux-next
    git_sha: 368847b165bbfbdcf0bd4c96b167893dcdb13aba
    git_short_log: 368847b165bb (\"Add linux-next specific files for 20210916\")
    kconfig: [
        allnoconfig
    ],
    kernel_version: 5.14.0
    target_arch: arm
    toolchain: clang-12

Steps to reproduce:
tuxmake --runtime podman --target-arch arm --toolchain clang-12
--kconfig allnoconfig

--
Linaro LKFT
https://lkft.linaro.org