projects/linux·blob v6.1 · refs

72 lines · 1.5 KiB

1#!/bin/sh
2# SPDX-License-Identifier: GPL-2.0
3#
4# Print the C compiler name and its version in a 5 or 6-digit form.
5# Also, perform the minimum version check.
6
7set -e
8
9# Print the C compiler name and some version components.
10get_c_compiler_info()
11{
12 cat <<- EOF | "$@" -E -P -x c - 2>/dev/null
13 #if defined(__clang__)
14 Clang __clang_major__ __clang_minor__ __clang_patchlevel__
15 #elif defined(__INTEL_COMPILER)
16 ICC __INTEL_COMPILER __INTEL_COMPILER_UPDATE
17 #elif defined(__GNUC__)
18 GCC __GNUC__ __GNUC_MINOR__ __GNUC_PATCHLEVEL__
19 #else
20 unknown
21 #endif
22 EOF
23}
24
25# Convert the version string x.y.z to a canonical 5 or 6-digit form.
26get_canonical_version()
27{
28 IFS=.
29 set -- $1
30 echo $((10000 * $1 + 100 * $2 + $3))
31}
32
33# $@ instead of $1 because multiple words might be given, e.g. CC="ccache gcc".
34orig_args="$@"
35set -- $(get_c_compiler_info "$@")
36
37name=$1
38
39min_tool_version=$(dirname $0)/min-tool-version.sh
40
41case "$name" in
42GCC)
43 version=$2.$3.$4
44 min_version=$($min_tool_version gcc)
45 ;;
46Clang)
47 version=$2.$3.$4
48 min_version=$($min_tool_version llvm)
49 ;;
50ICC)
51 version=$(($2 / 100)).$(($2 % 100)).$3
52 min_version=$($min_tool_version icc)
53 ;;
54*)
55 echo "$orig_args: unknown C compiler" >&2
56 exit 1
57 ;;
58esac
59
60cversion=$(get_canonical_version $version)
61min_cversion=$(get_canonical_version $min_version)
62
63if [ "$cversion" -lt "$min_cversion" ]; then
64 echo >&2 "***"
65 echo >&2 "*** C compiler is too old."
66 echo >&2 "*** Your $name version: $version"
67 echo >&2 "*** Minimum $name version: $min_version"
68 echo >&2 "***"
69 exit 1
70fi
71
72echo $name $cversion