2 # SPDX-License-Identifier: GPL-2.0
4 # Print the linker name and its version in a 5 or 6-digit form.
5 # Also, perform the minimum version check.
9 # When you raise the minimum linker version, please update
10 # Documentation/process/changes.rst as well.
11 bfd_min_version=2.23.0
12 lld_min_version=10.0.1
14 # Convert the version string x.y.z to a canonical 5 or 6-digit form.
15 get_canonical_version()
20 # If the 2nd or 3rd field is missing, fill it with a zero.
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}))
29 # Get the first line of the --version output.
32 set -- $(LC_ALL=C "$@" --version)
34 # Split the line on spaces.
38 if [ "$1" = GNU -a "$2" = ld ]; then
41 min_version=$bfd_min_version
44 elif [ "$1" = GNU -a "$2" = gold ]; then
45 echo "gold linker is not supported as it is not capable of linking the kernel proper." >&2
48 while [ $# -gt 1 -a "$1" != "LLD" ]; do
52 if [ "$1" = LLD ]; then
54 min_version=$lld_min_version
58 echo "$orig_args: unknown linker" >&2
63 # Some distributions append a package release number, as in 2.34-4.fc32
64 # Trim the hyphen and any characters that follow.
67 cversion=$(get_canonical_version $version)
68 min_cversion=$(get_canonical_version $min_version)
70 if [ "$cversion" -lt "$min_cversion" ]; then
72 echo >&2 "*** Linker is too old."
73 echo >&2 "*** Your $disp_name version: $version"
74 echo >&2 "*** Minimum $disp_name version: $min_version"