1#!/bin/sh
 2# SPDX-License-Identifier: GPL-2.0
 3#
 4# clang-version [-p] clang-command
 5#
 6# Prints the compiler version of `clang-command' in a canonical 4-digit form
 7# such as `0500' for clang-5.0 etc.
 8#
 9# With the -p option, prints the patchlevel as well, for example `050001' for
10# clang-5.0.1 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$0 <clang-command>\n"
23	exit 1
24fi
25
26MAJOR=$(echo __clang_major__ | $compiler -E -x c - | tail -n 1)
27MINOR=$(echo __clang_minor__ | $compiler -E -x c - | tail -n 1)
28if [ "x$with_patchlevel" != "x" ] ; then
29	PATCHLEVEL=$(echo __clang_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