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The kernel build uses various tools, many of which are provided by the same software suite, for example, LLVM and Binutils. When you raise the minimum version of Clang/LLVM, you need to update clang_min_version in scripts/cc-version.sh and also lld_min_version in scripts/ld-version.sh. Kbuild can handle CC=clang and LD=ld.lld independently, but it does not make much sense to maintain their versions separately. Let's create a central place of minimum tool versions so you do not need to touch multiple files. scripts/min-tool-version.sh prints the minimum version of the given tool. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Reviewed-by: Nathan Chancellor <nathan@kernel.org> Acked-by: Miguel Ojeda <ojeda@kernel.org> Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
76 lines
1.7 KiB
Bash
Executable file
76 lines
1.7 KiB
Bash
Executable file
#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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#
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# Print the linker name and its version in a 5 or 6-digit form.
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# Also, perform the minimum version check.
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set -e
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# Convert the version string x.y.z to a canonical 5 or 6-digit form.
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get_canonical_version()
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{
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IFS=.
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set -- $1
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# If the 2nd or 3rd field is missing, fill it with a zero.
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#
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# The 4th field, if present, is ignored.
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# This occurs in development snapshots as in 2.35.1.20201116
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echo $((10000 * $1 + 100 * ${2:-0} + ${3:-0}))
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}
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orig_args="$@"
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# Get the first line of the --version output.
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IFS='
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'
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set -- $(LC_ALL=C "$@" --version)
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# Split the line on spaces.
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IFS=' '
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set -- $1
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min_tool_version=$(dirname $0)/min-tool-version.sh
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if [ "$1" = GNU -a "$2" = ld ]; then
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shift $(($# - 1))
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version=$1
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min_version=$($min_tool_version binutils)
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name=BFD
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disp_name="GNU ld"
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elif [ "$1" = GNU -a "$2" = gold ]; then
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echo "gold linker is not supported as it is not capable of linking the kernel proper." >&2
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exit 1
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else
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while [ $# -gt 1 -a "$1" != "LLD" ]; do
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shift
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done
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if [ "$1" = LLD ]; then
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version=$2
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min_version=$($min_tool_version llvm)
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name=LLD
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disp_name=LLD
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else
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echo "$orig_args: unknown linker" >&2
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exit 1
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fi
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fi
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# Some distributions append a package release number, as in 2.34-4.fc32
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# Trim the hyphen and any characters that follow.
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version=${version%-*}
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cversion=$(get_canonical_version $version)
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min_cversion=$(get_canonical_version $min_version)
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if [ "$cversion" -lt "$min_cversion" ]; then
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echo >&2 "***"
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echo >&2 "*** Linker is too old."
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echo >&2 "*** Your $disp_name version: $version"
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echo >&2 "*** Minimum $disp_name version: $min_version"
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echo >&2 "***"
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exit 1
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fi
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echo $name $cversion
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