mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-14 15:54:15 +08:00
2185a7e4b0
It has been brought up a few times in various code reviews that clang
3.5 introduced -f{,no-}integrated-as as the preferred way to enable and
disable the integrated assembler, mentioning that -{no-,}integrated-as
are now considered legacy flags.
Switch the kernel over to using those variants in case there is ever a
time where clang decides to remove the non-'f' variants of the flag.
Also, fix a typo in a comment ("intergrated" -> "integrated").
Link: https://releases.llvm.org/3.5.0/tools/clang/docs/ReleaseNotes.html#new-compiler-flags
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
83 lines
2.0 KiB
Bash
Executable File
83 lines
2.0 KiB
Bash
Executable File
#!/bin/sh
|
|
# SPDX-License-Identifier: GPL-2.0-only
|
|
#
|
|
# Print the assembler name and its version in a 5 or 6-digit form.
|
|
# Also, perform the minimum version check.
|
|
# (If it is the integrated assembler, return 0 as the version, and
|
|
# skip the version check.)
|
|
|
|
set -e
|
|
|
|
# Convert the version string x.y.z to a canonical 5 or 6-digit form.
|
|
get_canonical_version()
|
|
{
|
|
IFS=.
|
|
set -- $1
|
|
|
|
# If the 2nd or 3rd field is missing, fill it with a zero.
|
|
#
|
|
# The 4th field, if present, is ignored.
|
|
# This occurs in development snapshots as in 2.35.1.20201116
|
|
echo $((10000 * $1 + 100 * ${2:-0} + ${3:-0}))
|
|
}
|
|
|
|
# Clang fails to handle -Wa,--version unless -fno-integrated-as is given.
|
|
# We check -fintegrated-as, expecting it is explicitly passed in for the
|
|
# integrated assembler case.
|
|
check_integrated_as()
|
|
{
|
|
while [ $# -gt 0 ]; do
|
|
if [ "$1" = -fintegrated-as ]; then
|
|
# For the integrated assembler, we do not check the
|
|
# version here. It is the same as the clang version, and
|
|
# it has been already checked by scripts/cc-version.sh.
|
|
echo LLVM 0
|
|
exit 0
|
|
fi
|
|
shift
|
|
done
|
|
}
|
|
|
|
check_integrated_as "$@"
|
|
|
|
orig_args="$@"
|
|
|
|
# Get the first line of the --version output.
|
|
IFS='
|
|
'
|
|
set -- $(LC_ALL=C "$@" -Wa,--version -c -x assembler /dev/null -o /dev/null 2>/dev/null)
|
|
|
|
# Split the line on spaces.
|
|
IFS=' '
|
|
set -- $1
|
|
|
|
min_tool_version=$(dirname $0)/min-tool-version.sh
|
|
|
|
if [ "$1" = GNU -a "$2" = assembler ]; then
|
|
shift $(($# - 1))
|
|
version=$1
|
|
min_version=$($min_tool_version binutils)
|
|
name=GNU
|
|
else
|
|
echo "$orig_args: unknown assembler invoked" >&2
|
|
exit 1
|
|
fi
|
|
|
|
# Some distributions append a package release number, as in 2.34-4.fc32
|
|
# Trim the hyphen and any characters that follow.
|
|
version=${version%-*}
|
|
|
|
cversion=$(get_canonical_version $version)
|
|
min_cversion=$(get_canonical_version $min_version)
|
|
|
|
if [ "$cversion" -lt "$min_cversion" ]; then
|
|
echo >&2 "***"
|
|
echo >&2 "*** Assembler is too old."
|
|
echo >&2 "*** Your $name assembler version: $version"
|
|
echo >&2 "*** Minimum $name assembler version: $min_version"
|
|
echo >&2 "***"
|
|
exit 1
|
|
fi
|
|
|
|
echo $name $cversion
|