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cc-version.sh
#!/bin/sh # SPDX-License-Identifier: GPL-2.0 # # Print the C compiler name and its version in a 5 or 6-digit form. # Also, perform the minimum version check. set -e # Print the C compiler name and some version components. get_c_compiler_info() { cat <<- EOF | "$@" -E -P -x c - 2>/dev/null #if defined(__clang__) Clang __clang_major__ __clang_minor__ __clang_patchlevel__ #elif defined(__GNUC__) GCC __GNUC__ __GNUC_MINOR__ __GNUC_PATCHLEVEL__ #else unknown #endif EOF } # Convert the version string x.y.z to a canonical 5 or 6-digit form. get_canonical_version() { IFS=. set -- $1 echo $((10000 * $1 + 100 * $2 + $3)) } # $@ instead of $1 because multiple words might be given, e.g. CC="ccache gcc". orig_args="$@" set -- $(get_c_compiler_info "$@") name=$1 min_tool_version=$(dirname $0)/min-tool-version.sh case "$name" in GCC) version=$2.$3.$4 min_version=$($min_tool_version gcc) ;; Clang) version=$2.$3.$4 min_version=$($min_tool_version llvm) ;; *) echo "$orig_args: unknown C compiler" >&2 exit 1 ;; esac cversion=$(get_canonical_version $version) min_cversion=$(get_canonical_version $min_version) if [ "$cversion" -lt "$min_cversion" ]; then echo >&2 "***" echo >&2 "*** C compiler is too old." echo >&2 "*** Your $name version: $version" echo >&2 "*** Minimum $name version: $min_version" echo >&2 "***" exit 1 fi echo $name $cversion