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# Convert the version string x.y.z to a canonical 5 or 6-digit form. 10get_canonical_version() 11{ 12 IFS=. 13 set -- $1 14 15 # If the 2nd or 3rd field is missing, fill it with a zero. 16 # 17 # The 4th field, if present, is ignored. 18 # This occurs in development snapshots as in 2.35.1.20201116 19 echo $((10000 * $1 + 100 * ${2:-0} + ${3:-0})) 20} 21 22orig_args="$@" 23 24# Get the first line of the --version output. 25IFS=' 26' 27set -- $(LC_ALL=C "$@" --version) 28 29# Split the line on spaces. 30IFS=' ' 31set -- $1 32 33min_tool_version=$(dirname $0)/min-tool-version.sh 34 35if [ "$1" = GNU -a "$2" = ld ]; then 36 shift $(($# - 1)) 37 version=$1 38 min_version=$($min_tool_version binutils) 39 name=BFD 40 disp_name="GNU ld" 41elif [ "$1" = GNU -a "$2" = gold ]; then 42 echo "gold linker is not supported as it is not capable of linking the kernel proper." >&2 43 exit 1 44else 45 while [ $# -gt 1 -a "$1" != "LLD" ]; do 46 shift 47 done 48 49 if [ "$1" = LLD ]; then 50 version=$2 51 min_version=$($min_tool_version llvm) 52 name=LLD 53 disp_name=LLD 54 else 55 echo "$orig_args: unknown linker" >&2 56 exit 1 57 fi 58fi 59 60# Some distributions append a package release number, as in 2.34-4.fc32 61# Trim the hyphen and any characters that follow. 62version=${version%-*} 63 64cversion=$(get_canonical_version $version) 65min_cversion=$(get_canonical_version $min_version) 66 67if [ "$cversion" -lt "$min_cversion" ]; then 68 echo >&2 "***" 69 echo >&2 "*** Linker is too old." 70 echo >&2 "*** Your $disp_name version: $version" 71 echo >&2 "*** Minimum $disp_name version: $min_version" 72 echo >&2 "***" 73 exit 1 74fi 75 76echo $name $cversion 77