#!/bin/bash

# This file is part of Jehanne.
#
# Copyright (C) 2017 Giacomo Tesio <giacomo@tesio.it>
#
# Jehanne is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, version 2 of the License.
#
# Jehanne is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Jehanne.  If not, see <http://www.gnu.org/licenses/>.

set -e

if [ "$JEHANNE" = "" ]; then
        echo $0 requires the shell started by ./hacking/devshell.sh
        exit 1
fi

# To create a Jehanne version of newlib, we need specific OUTDATED versions
# of Autotools that won't compile easily in a modern Linux distro.
export PATH=$JEHANNE/hacking/cross/tmp/bin:$PATH

function failOnError {
	# $1 -> exit status on a previous command
	# $2 -> task description
	if [ $1 -ne 0 ]; then
		echo "ERROR $2"
		exit $1
	fi
}

export CROSS_DIR=$JEHANNE/hacking/cross
export NEWLIB=$CROSS_DIR/pkgs/newlib/
export NEWLIB_SRC=$NEWLIB/src/
export NEWLIB_BUILD=$NEWLIB/build/
export NEWLIB_PREFIX=$NEWLIB/output/

if [ "$NEWLIB_OPTIMIZATION" = "" ]; then
	NEWLIB_OPTIMIZATION=2
fi

# NOTE: we use -O0 because apparently vsprintf functions do not
#       work with -O2.
export CFLAGS_FOR_TARGET="-g -gdwarf-2 -ggdb -O$NEWLIB_OPTIMIZATION"

(
	rm -fr $NEWLIB_BUILD &&
	rm -fr $NEWLIB_PREFIX &&
	mkdir $NEWLIB_BUILD &&
	mkdir $NEWLIB_PREFIX &&
	cd $NEWLIB_BUILD &&
	$NEWLIB_SRC/configure --prefix=$NEWLIB_PREFIX --target=x86_64-jehanne &&
	make all && make install &&
	rm -fr $JEHANNE/sys/posix/newlib &&
	rm -fr $JEHANNE/arch/amd64/lib/newlib &&
	mv $NEWLIB_PREFIX/x86_64-jehanne/include/ $JEHANNE/sys/posix/newlib &&
	echo "Newlib headers installed at $JEHANNE/sys/posix/newlib/" &&
	mv $NEWLIB_PREFIX/x86_64-jehanne/lib/ $JEHANNE/arch/amd64/lib/newlib/ &&
	echo "Newlib libraries installed at $JEHANNE/arch/amd64/lib/newlib/"
)
failOnError $? "building newlib"