#!/usr/bin/env bash
# this script installs https://github.com/riscv-collab/riscv-gnu-toolchain

set -eu

if ! command -v apt &> /dev/null
then
    echo "This script was written for Debian based Linux Systems. It seems like \
you are using something else. Please change this script to work with your OS."
    echo "You can find further infos at https://github.com/riscv-collab/riscv-gnu-toolchain"
    exit 1
fi

function print_step {
    echo "==========="
    echo -e ">>> \033[0;36m $@\033[0m"
    echo "==========="
}

if test -d riscv-gnu-toolchain; then
    echo "Skipping steps 1..3"
    cd riscv-gnu-toolchain
else

    print_step "[1] Installing dependencies"
    sudo apt-get install -y autoconf automake autotools-dev curl python3 libmpc-dev libmpfr-dev libgmp-dev gawk build-essential bison flex texinfo gperf libtool patchutils bc zlib1g-dev libexpat-dev git


    print_step "[2] Cloning repository"

    git clone --depth 1 https://github.com/riscv-collab/riscv-gnu-toolchain

    print_step "[3] Configuring build"
    cd riscv-gnu-toolchain
    ./configure --prefix=$(pwd)/../toolchain/ --with-arch=rv32ima --disable-linux --disable-gdb --disable-multilib
fi

print_step "[4] Compiling"
echo "This might take up to an hour! Be patient!"
# call make with as many threads as the system has available
make -j $(grep -c ^processor /proc/cpuinfo)