#!/bin/sh # SPDX-License-Identifier: GPL-2.0 # # Print the linker name and its version in a 5 or 6-digit form. # Also, perform the minimum version check. 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() { 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} + ${3:-0})) } orig_args="$@" # Get the first line of the --version output. IFS=' ' set -- $("$@" --version) # Split the line on spaces. IFS=' ' set -- $1 if [ "$1" = GNU -a "$2" = ld ]; then shift $(($# - 1)) version=$1 min_version=$bfd_min_version name=BFD disp_name="GNU ld" elif [ "$1" = GNU -a "$2" = gold ]; then echo "gold linker is not supported as it is not capable of linking the kernel proper." >&2 exit 1 else while [ $# -gt 1 -a "$1" != "LLD" ]; do shift done if [ "$1" = LLD ]; then version=$2 min_version=$lld_min_version name=LLD disp_name=LLD else echo "$orig_args: unknown linker" >&2 exit 1 fi fi # Some distributions append a package release number, as in 2.34-4.fc32 # Trim the hyphen and any characters that follow. version=${version%-*} cversion=$(get_canonical_version $version) min_cversion=$(get_canonical_version $min_version) if [ "$cversion" -lt "$min_cversion" ]; then echo >&2 "***" echo >&2 "*** Linker is too old." echo >&2 "*** Your $disp_name version: $version" echo >&2 "*** Minimum $disp_name version: $min_version" echo >&2 "***" exit 1 fi echo $name $cversion