1#!/bin/sh 2# SPDX-License-Identifier: GPL-2.0 3# 4# Print the linker name and its version in a 5 or 6-digit form. 5# Also, perform the minimum version check. 6 7set -e 8 9# When you raise the minimum linker version, please update 10# Documentation/process/changes.rst as well. 11bfd_min_version=2.23.0 12lld_min_version=10.0.1 13 14# Convert the version string x.y.z to a canonical 5 or 6-digit form. 15get_canonical_version() 16{ 17 IFS=. 18 set -- $1 19 20 # If the 2nd or 3rd field is missing, fill it with a zero. 21 # 22 # The 4th field, if present, is ignored. 23 # This occurs in development snapshots as in 2.35.1.20201116 24 echo $((10000 * $1 + 100 * ${2:-0} + ${3:-0})) 25} 26 27orig_args="$@" 28 29# Get the first line of the --version output. 30IFS=' 31' 32set -- $("$@" --version) 33 34# Split the line on spaces. 35IFS=' ' 36set -- $1 37 38if [ "$1" = GNU -a "$2" = ld ]; then 39 shift $(($# - 1)) 40 version=$1 41 min_version=$bfd_min_version 42 name=BFD 43 disp_name="GNU ld" 44elif [ "$1" = GNU -a "$2" = gold ]; then 45 echo "gold linker is not supported as it is not capable of linking the kernel proper." >&2 46 exit 1 47elif [ "$1" = LLD ]; then 48 version=$2 49 min_version=$lld_min_version 50 name=LLD 51 disp_name=LLD 52else 53 echo "$orig_args: unknown linker" >&2 54 exit 1 55fi 56 57# Some distributions append a package release number, as in 2.34-4.fc32 58# Trim the hyphen and any characters that follow. 59version=${version%-*} 60 61cversion=$(get_canonical_version $version) 62min_cversion=$(get_canonical_version $min_version) 63 64if [ "$cversion" -lt "$min_cversion" ]; then 65 echo >&2 "***" 66 echo >&2 "*** Linker is too old." 67 echo >&2 "*** Your $disp_name version: $version" 68 echo >&2 "*** Minimum $disp_name version: $min_version" 69 echo >&2 "***" 70 exit 1 71fi 72 73echo $name $cversion 74