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 7 set -e 8 9 # Print the C compiler name and some version components. 10 get_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. 26 get_canonical_version() 27 { 28 IFS=. 29 set -- $1 30 echo $((10000 * $1 + 100 * $2 + $3)) 31 } 32 33 # $@ instead of $1 because multiple words might be given, e.g. CC="ccache gcc". 34 orig_args="$@" 35 set -- $(get_c_compiler_info "$@") 36 37 name=$1 38 39 min_tool_version=$(dirname $0)/min-tool-version.sh 40 41 case "$name" in 42 GCC) 43 version=$2.$3.$4 44 min_version=$($min_tool_version gcc) 45 ;; 46 Clang) 47 version=$2.$3.$4 48 min_version=$($min_tool_version llvm) 49 ;; 50 ICC) 51 version=$(($2 / 100)).$(($2 % 100)).$3 52 min_version=$($min_tool_version icc) 53 ;; 54 *) 55 echo "$orig_args: unknown C compiler" >&2 56 exit 1 57 ;; 58 esac 59 60 cversion=$(get_canonical_version $version) 61 min_cversion=$(get_canonical_version $min_version) 62 63 if [ "$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 70 fi 71 72 echo $name $cversion 73