projects/linux·blob v5.12 · refs

82 lines · 1.8 KiB

1#!/bin/sh
2# SPDX-License-Identifier: GPL-2.0
3#
4# Print the compiler 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 compiler version, please update
10# Documentation/process/changes.rst as well.
11gcc_min_version=4.9.0
12clang_min_version=10.0.1
13icc_min_version=16.0.3 # temporary
14
15# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63293
16# https://lore.kernel.org/r/[email protected]
17if [ "$SRCARCH" = arm64 ]; then
18 gcc_min_version=5.1.0
19fi
20
21# Print the compiler name and some version components.
22get_compiler_info()
23{
24 cat <<- EOF | "$@" -E -P -x c - 2>/dev/null
25 #if defined(__clang__)
26 Clang __clang_major__ __clang_minor__ __clang_patchlevel__
27 #elif defined(__INTEL_COMPILER)
28 ICC __INTEL_COMPILER __INTEL_COMPILER_UPDATE
29 #elif defined(__GNUC__)
30 GCC __GNUC__ __GNUC_MINOR__ __GNUC_PATCHLEVEL__
31 #else
32 unknown
33 #endif
34 EOF
35}
36
37# Convert the version string x.y.z to a canonical 5 or 6-digit form.
38get_canonical_version()
39{
40 IFS=.
41 set -- $1
42 echo $((10000 * $1 + 100 * $2 + $3))
43}
44
45# $@ instead of $1 because multiple words might be given, e.g. CC="ccache gcc".
46orig_args="$@"
47set -- $(get_compiler_info "$@")
48
49name=$1
50
51case "$name" in
52GCC)
53 version=$2.$3.$4
54 min_version=$gcc_min_version
55 ;;
56Clang)
57 version=$2.$3.$4
58 min_version=$clang_min_version
59 ;;
60ICC)
61 version=$(($2 / 100)).$(($2 % 100)).$3
62 min_version=$icc_min_version
63 ;;
64*)
65 echo "$orig_args: unknown compiler" >&2
66 exit 1
67 ;;
68esac
69
70cversion=$(get_canonical_version $version)
71min_cversion=$(get_canonical_version $min_version)
72
73if [ "$cversion" -lt "$min_cversion" ]; then
74 echo >&2 "***"
75 echo >&2 "*** Compiler is too old."
76 echo >&2 "*** Your $name version: $version"
77 echo >&2 "*** Minimum $name version: $min_version"
78 echo >&2 "***"
79 exit 1
80fi
81
82echo $name $cversion