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