xref: /openbmc/linux/scripts/cc-version.sh (revision b1c3d2be) 
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
73