1 #!/bin/sh 1 #!/bin/sh
2 # SPDX-License-Identifier: GPL-2.0 2 # SPDX-License-Identifier: GPL-2.0
3 # 3 #
4 # Print the linker name and its version in a 5 4 # Print the linker name and its version in a 5 or 6-digit form.
5 # Also, perform the minimum version check. 5 # Also, perform the minimum version check.
6 6
7 set -e 7 set -e
8 8
>> 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
>> 13
9 # Convert the version string x.y.z to a canoni 14 # Convert the version string x.y.z to a canonical 5 or 6-digit form.
10 get_canonical_version() 15 get_canonical_version()
11 { 16 {
12 IFS=. 17 IFS=.
13 set -- $1 18 set -- $1
14 19
15 # If the 2nd or 3rd field is missing, 20 # If the 2nd or 3rd field is missing, fill it with a zero.
16 # 21 #
17 # The 4th field, if present, is ignore 22 # The 4th field, if present, is ignored.
18 # This occurs in development snapshots 23 # This occurs in development snapshots as in 2.35.1.20201116
19 echo $((10000 * $1 + 100 * ${2:-0} + $ 24 echo $((10000 * $1 + 100 * ${2:-0} + ${3:-0}))
20 } 25 }
21 26
22 orig_args="$@" 27 orig_args="$@"
23 28
24 # Get the first line of the --version output. 29 # Get the first line of the --version output.
25 IFS=' 30 IFS='
26 ' 31 '
27 set -- $(LC_ALL=C "$@" --version) 32 set -- $(LC_ALL=C "$@" --version)
28 33
29 # Split the line on spaces. 34 # Split the line on spaces.
30 IFS=' ' 35 IFS=' '
31 set -- $1 36 set -- $1
32 37
33 min_tool_version=$(dirname $0)/min-tool-versio <<
34 <<
35 if [ "$1" = GNU -a "$2" = ld ]; then 38 if [ "$1" = GNU -a "$2" = ld ]; then
36 shift $(($# - 1)) 39 shift $(($# - 1))
37 version=$1 40 version=$1
38 min_version=$($min_tool_version binuti !! 41 min_version=$bfd_min_version
39 name=BFD 42 name=BFD
40 disp_name="GNU ld" 43 disp_name="GNU ld"
41 elif [ "$1" = GNU -a "$2" = gold ]; then 44 elif [ "$1" = GNU -a "$2" = gold ]; then
42 echo "gold linker is not supported as 45 echo "gold linker is not supported as it is not capable of linking the kernel proper." >&2
43 exit 1 46 exit 1
44 else 47 else
45 while [ $# -gt 1 -a "$1" != "LLD" ]; d 48 while [ $# -gt 1 -a "$1" != "LLD" ]; do
46 shift 49 shift
47 done 50 done
48 51
49 if [ "$1" = LLD ]; then 52 if [ "$1" = LLD ]; then
50 version=$2 53 version=$2
51 min_version=$($min_tool_versio !! 54 min_version=$lld_min_version
52 name=LLD 55 name=LLD
53 disp_name=LLD 56 disp_name=LLD
54 else 57 else
55 echo "$orig_args: unknown link 58 echo "$orig_args: unknown linker" >&2
56 exit 1 59 exit 1
57 fi 60 fi
58 fi 61 fi
59 62
60 # There may be something after the version, su !! 63 # Some distributions append a package release number, as in 2.34-4.fc32
61 # release number (like Fedora's "2.34-4.fc32") !! 64 # Trim the hyphen and any characters that follow.
62 # added before the "compatible with GNU linker !! 65 version=${version%-*}
63 # after just numbers and periods. <<
64 version=${version%%[!0-9.]*} <<
65 66
66 cversion=$(get_canonical_version $version) 67 cversion=$(get_canonical_version $version)
67 min_cversion=$(get_canonical_version $min_vers 68 min_cversion=$(get_canonical_version $min_version)
68 69
69 if [ "$cversion" -lt "$min_cversion" ]; then 70 if [ "$cversion" -lt "$min_cversion" ]; then
70 echo >&2 "***" 71 echo >&2 "***"
71 echo >&2 "*** Linker is too old." 72 echo >&2 "*** Linker is too old."
72 echo >&2 "*** Your $disp_name versio 73 echo >&2 "*** Your $disp_name version: $version"
73 echo >&2 "*** Minimum $disp_name ver 74 echo >&2 "*** Minimum $disp_name version: $min_version"
74 echo >&2 "***" 75 echo >&2 "***"
75 exit 1 76 exit 1
76 fi 77 fi
77 78
78 echo $name $cversion 79 echo $name $cversion
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