linux/scripts/gcc-version.sh
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   1#!/bin/sh
   2# SPDX-License-Identifier: GPL-2.0
   3#
   4# gcc-version [-p] gcc-command
   5#
   6# Prints the gcc version of `gcc-command' in a canonical 4-digit form
   7# such as `0295' for gcc-2.95, `0303' for gcc-3.3, etc.
   8#
   9# With the -p option, prints the patchlevel as well, for example `029503' for
  10# gcc-2.95.3, `030301' for gcc-3.3.1, etc.
  11#
  12
  13if [ "$1" = "-p" ] ; then
  14        with_patchlevel=1;
  15        shift;
  16fi
  17
  18compiler="$*"
  19
  20if [ ${#compiler} -eq 0 ]; then
  21        echo "Error: No compiler specified."
  22        printf "Usage:\n\t$0 <gcc-command>\n"
  23        exit 1
  24fi
  25
  26MAJOR=$(echo __GNUC__ | $compiler -E -x c - | tail -n 1)
  27MINOR=$(echo __GNUC_MINOR__ | $compiler -E -x c - | tail -n 1)
  28if [ "x$with_patchlevel" != "x" ] ; then
  29        PATCHLEVEL=$(echo __GNUC_PATCHLEVEL__ | $compiler -E -x c - | tail -n 1)
  30        printf "%02d%02d%02d\\n" $MAJOR $MINOR $PATCHLEVEL
  31else
  32        printf "%02d%02d\\n" $MAJOR $MINOR
  33fi
  34