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(__GNUC__) 16 GCC __GNUC__ __GNUC_MINOR__ __GNUC_PATCHLEVEL__ 17 #else 18 unknown 19 #endif 20 EOF 21} 22 23# Convert the version string x.y.z to a canonical 5 or 6-digit form. 24get_canonical_version() 25{ 26 IFS=. 27 set -- $1 28 echo $((10000 * $1 + 100 * $2 + $3)) 29} 30 31# $@ instead of $1 because multiple words might be given, e.g. CC="ccache gcc". 32orig_args="$@" 33set -- $(get_c_compiler_info "$@") 34 35name=$1 36 37min_tool_version=$(dirname $0)/min-tool-version.sh 38 39case "$name" in 40GCC) 41 version=$2.$3.$4 42 min_version=$($min_tool_version gcc) 43 ;; 44Clang) 45 version=$2.$3.$4 46 min_version=$($min_tool_version llvm) 47 ;; 48ICC) 49 version=$(($2 / 100)).$(($2 % 100)).$3 50 min_version=$($min_tool_version icc) 51 ;; 52*) 53 echo "$orig_args: unknown C compiler" >&2 54 exit 1 55 ;; 56esac 57 58cversion=$(get_canonical_version $version) 59min_cversion=$(get_canonical_version $min_version) 60 61if [ "$cversion" -lt "$min_cversion" ]; then 62 echo >&2 "***" 63 echo >&2 "*** C compiler is too old." 64 echo >&2 "*** Your $name version: $version" 65 echo >&2 "*** Minimum $name version: $min_version" 66 echo >&2 "***" 67 exit 1 68fi 69 70echo $name $cversion 71