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kbuild: collect minimum tool versions into scripts/min-tool-version.sh 

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>
This commit is contained in:
Masahiro Yamada 2021-03-16 01:12:55 +09:00
parent 6e0839fda3
commit e24b3ffcf4
3 changed files with 48 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
scripts/cc-version.sh
View File

@ -6,18 +6,6 @@
set -e
# When you raise the minimum compiler version, please update
# Documentation/process/changes.rst as well.
gcc_min_version=4.9.0
clang_min_version=10.0.1
icc_min_version=16.0.3 # temporary
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63293
# https://lore.kernel.org/r/20210107111841.GN1551@shell.armlinux.org.uk
if [ "$SRCARCH" = arm64 ]; then
gcc_min_version=5.1.0
fi
# Print the compiler name and some version components.
get_compiler_info()
{
@ -48,18 +36,20 @@ set -- $(get_compiler_info "$@")
name=$1
min_tool_version=$(dirname $0)/min-tool-version.sh
case "$name" in
GCC)
version=$2.$3.$4
min_version=$gcc_min_version
min_version=$($min_tool_version gcc)
;;
Clang)
version=$2.$3.$4
min_version=$clang_min_version
min_version=$($min_tool_version llvm)
;;
ICC)
version=$(($2 / 100)).$(($2 % 100)).$3
min_version=$icc_min_version
min_version=$($min_tool_version icc)
;;
*)
echo "$orig_args: unknown compiler" >&2

11
scripts/ld-version.sh
View File

@ -6,11 +6,6 @@
set -e
# When you raise the minimum linker version, please update
# Documentation/process/changes.rst as well.
bfd_min_version=2.23.0
lld_min_version=10.0.1
# Convert the version string x.y.z to a canonical 5 or 6-digit form.
get_canonical_version()
{
@ -35,10 +30,12 @@ set -- $(LC_ALL=C "$@" --version)
IFS=' '
set -- $1
min_tool_version=$(dirname $0)/min-tool-version.sh
if [ "$1" = GNU -a "$2" = ld ]; then
shift $(($# - 1))
version=$1
min_version=$bfd_min_version
min_version=$($min_tool_version binutils)
name=BFD
disp_name="GNU ld"
elif [ "$1" = GNU -a "$2" = gold ]; then
@ -51,7 +48,7 @@ else
if [ "$1" = LLD ]; then
version=$2
min_version=$lld_min_version
min_version=$($min_tool_version llvm)
name=LLD
disp_name=LLD
else

39
scripts/min-tool-version.sh Executable file
View File

@ -0,0 +1,39 @@
#!/bin/sh
# SPDX-License-Identifier: GPL-2.0-only
#
# Print the minimum supported version of the given tool.
# When you raise the minimum version, please update
# Documentation/process/changes.rst as well.
set -e
if [ $# != 1 ]; then
echo "Usage: $0 toolname" >&2
exit 1
fi
case "$1" in
binutils)
echo 2.23.0
;;
gcc)
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63293
# https://lore.kernel.org/r/20210107111841.GN1551@shell.armlinux.org.uk
if [ "$SRCARCH" = arm64 ]; then
echo 5.1.0
else
echo 4.9.0
fi
;;
icc)
# temporary
echo 16.0.3
;;
llvm)
echo 10.0.1
;;
*)
echo "$1: unknown tool" >&2
exit 1
;;
esac