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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>
72 lines
1.5 KiB
Bash
Executable file
72 lines
1.5 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 compiler 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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# Print the compiler name and some version components.
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get_compiler_info()
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{
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cat <<- EOF | "$@" -E -P -x c - 2>/dev/null
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#if defined(__clang__)
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Clang __clang_major__ __clang_minor__ __clang_patchlevel__
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#elif defined(__INTEL_COMPILER)
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ICC __INTEL_COMPILER __INTEL_COMPILER_UPDATE
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#elif defined(__GNUC__)
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GCC __GNUC__ __GNUC_MINOR__ __GNUC_PATCHLEVEL__
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#else
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unknown
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#endif
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EOF
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}
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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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echo $((10000 * $1 + 100 * $2 + $3))
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}
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# $@ instead of $1 because multiple words might be given, e.g. CC="ccache gcc".
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orig_args="$@"
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set -- $(get_compiler_info "$@")
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name=$1
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min_tool_version=$(dirname $0)/min-tool-version.sh
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case "$name" in
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GCC)
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version=$2.$3.$4
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min_version=$($min_tool_version gcc)
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;;
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Clang)
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version=$2.$3.$4
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min_version=$($min_tool_version llvm)
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;;
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ICC)
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version=$(($2 / 100)).$(($2 % 100)).$3
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min_version=$($min_tool_version icc)
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;;
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*)
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echo "$orig_args: unknown compiler" >&2
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exit 1
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;;
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esac
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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 "*** Compiler is too old."
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echo >&2 "*** Your $name version: $version"
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echo >&2 "*** Minimum $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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