scripts/cc-version.sh

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0
   3 #
   4 # Print the 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 compiler name and some version components.
  10 get_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 -- $(get_compiler_info "$@")
  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 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 "*** 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