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authorNathan Chancellor <natechancellor@gmail.com>2020-11-19 23:46:58 +0300
committerMasahiro Yamada <masahiroy@kernel.org>2020-12-01 16:46:06 +0300
commitd5750cd3c5486e9c0fa11100df01de8ca0c13fa7 (patch)
tree26a4b057cdca2ac3fdf9ba54d8732b3a9f4bd5c5 /scripts
parent59612b24f78a0b61fe078ec9dff2e48e9cec52c0 (diff)
downloadlinux-d5750cd3c5486e9c0fa11100df01de8ca0c13fa7.tar.xz
kbuild: Disable CONFIG_LD_ORPHAN_WARN for ld.lld 10.0.1
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>
Diffstat (limited to 'scripts')
-rwxr-xr-xscripts/lld-version.sh20
1 files changed, 20 insertions, 0 deletions
diff --git a/scripts/lld-version.sh b/scripts/lld-version.sh
new file mode 100755
index 000000000000..d70edb4d8a4f
--- /dev/null
+++ b/scripts/lld-version.sh
@@ -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