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#!/bin/sh
#-*-mode:sh;indent-tabs-mode:nil;tab-width:2;coding:utf-8-*-┐
#───vi: set net ft=sh ts=2 sts=2 fenc=utf-8 :vi─────────────┘
#
# OVERVIEW
#
# Compiler Version Discovery
#
# DESCRIPTION
#
# Cosmopolitan itself may be built using either GCC and Clang, and our
# build irons out many of the differences between the two. This script
# is used by build/definitions.mk alongside build/getccname to support
# the different versions folks use.
#
# Our aim is to support GCC 4.2.1+ since that's the last GPLv2 version
# with any sort of industry consensus. Please note, Cosmopolitan never
# links GCC runtimes when using later versions, so some concerns might
# not apply.
if [ ! -d o/third_party/gcc ]; then
third_party/gcc/unbundle.sh
fi
set -e
MAJOR_VERSION=$(
$1 --version |
head -n1 |
sed -n '
s!^[^(]*([^)]*) \([[:digit:]][[:digit:]]*\).*!\1!p
s!^.*clang.*version \([[:digit:]][[:digit:]]*\).*!\1!p
')
if [ -z "$MAJOR_VERSION" ]; then
echo 6
else
printf '%s\n' "$MAJOR_VERSION"
fi