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kbuild: Disable CONFIG_LD_ORPHAN_WARN for ld.lld 10.0.1

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ld.lld 10.0.1 spews a bunch of various warnings about .rela sections,
along with a few others. Newer versions of ld.lld do not have these
warnings. As a result, do not add '--orphan-handling=warn' to
LDFLAGS_vmlinux if ld.lld's version is not new enough.

Link: https://github.com/ClangBuiltLinux/linux/issues/1187
Link: https://github.com/ClangBuiltLinux/linux/issues/1193
Reported-by: Arvind Sankar <nivedita@alum.mit.edu>
Reported-by: kernelci.org bot <bot@kernelci.org>
Reported-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
This commit is contained in:
Nathan Chancellor 2020-11-19 13:46:58 -07:00 • committed by Masahiro Yamada
parent 59612b24f7
commit d5750cd3c5
3 changed files with 26 additions and 0 deletions
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20
scripts/lld-version.sh Executable file
View file

@ -0,0 +1,20 @@
#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
#
# Usage: $ ./scripts/lld-version.sh ld.lld
#
# Print the linker version of `ld.lld' in a 5 or 6-digit form
# such as `100001' for ld.lld 10.0.1 etc.
linker_string="$($* --version)"
if ! ( echo $linker_string | grep -q LLD ); then
echo 0
exit 1
fi
VERSION=$(echo $linker_string | cut -d ' ' -f 2)
MAJOR=$(echo $VERSION | cut -d . -f 1)
MINOR=$(echo $VERSION | cut -d . -f 2)
PATCHLEVEL=$(echo $VERSION | cut -d . -f 3)
printf "%d%02d%02d\\n" $MAJOR $MINOR $PATCHLEVEL