#!/usr/bin/env bash
set -e
source $(dirname $0)/setup-env.sh

cd $LUNA_ROOT

# libstdc++ needs autoconf (precisely version 2.69) so if the user has an older/more recent version, we must build autoconf from source.

export AUTOCONF_VERSION=2.69

mkdir -p toolchain/tarballs
mkdir -p toolchain/build

if [ ! -f toolchain/tarballs/autoconf-$AUTOCONF_VERSION.tar.gz ]; then
    echo "Downloading autoconf (precisely version 2.69)..."

    wget -Otoolchain/tarballs/autoconf-$AUTOCONF_VERSION.tar.gz https://ftp.gnu.org/gnu/autoconf/autoconf-$AUTOCONF_VERSION.tar.gz
fi

rm -rf toolchain/build/build-autoconf
rm -rf toolchain/build/autoconf-$AUTOCONF_VERSION

echo "Extracting autoconf (precisely version 2.69)..."

tar xf toolchain/tarballs/autoconf-$AUTOCONF_VERSION.tar.gz -C toolchain/build/

mkdir -p toolchain/build/build-autoconf

cd toolchain/build/build-autoconf

unset CC
unset CXX
unset LD
unset AR

echo "Building autoconf (precisely version 2.69)..."

../autoconf-$AUTOCONF_VERSION/configure --prefix="/"
make
DESTDIR=$LUNA_ROOT/toolchain/dist make install

cd $LUNA_ROOT
mv toolchain/dist/bin/* toolchain/dist