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
7 set -e
8
9 # Convert the version string x.y.z to a canonical 5 or 6-digit form.
10 get_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} + ${3:-0}))
20 }
21
22 orig_args="$@"
23
24 # Get the first line of the --version output.
25 IFS='
26 '
27 set -- $(LC_ALL=C "$@" --version)
28
29 # Split the line on spaces.
30 IFS=' '
31 set -- $1
32
33 min_tool_version=$(dirname $0)/min-tool-version.sh
34
35 if [ "$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"
41 elif [ "$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
44 else
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
58 fi
59
60 # There may be something after the version, such as a distribution's package
61 # release number (like Fedora's "2.34-4.fc32") or punctuation (like LLD briefly
62 # added before the "compatible with GNU linkers" string), so remove everything
63 # after just numbers and periods.
64 version=${version%%[!0-9.]*}
65
66 cversion=$(get_canonical_version $version)
67 min_cversion=$(get_canonical_version $min_version)
68
69 if [ "$cversion" -lt "$min_cversion" ]; then
70 echo >&2 "***"
71 echo >&2 "*** Linker is too old."
72 echo >&2 "*** Your $disp_name version: $version"
73 echo >&2 "*** Minimum $disp_name version: $min_version"
74 echo >&2 "***"
75 exit 1
76 fi
77
78 echo $name $cversion
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