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#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
#
# clang-version [-p] clang-command
#
# Prints the compiler version of `clang-command' in a canonical 4-digit form
# such as `0500' for clang-5.0 etc.
#
# With the -p option, prints the patchlevel as well, for example `050001' for
# clang-5.0.1 etc.
#

compiler="$*"

if ! ( $compiler --version | grep -q clang) ; then
	echo 0
	exit 1
fi

MAJOR=$(echo __clang_major__ | $compiler -E -x c - | tail -n 1)
MINOR=$(echo __clang_minor__ | $compiler -E -x c - | tail -n 1)
PATCHLEVEL=$(echo __clang_patchlevel__ | $compiler -E -x c - | tail -n 1)
printf "%d%02d%02d\\n" $MAJOR $MINOR $PATCHLEVEL