#!/bin/sh

set -e

# Check
if [ "$(uname -m)" != 'x86_64' ]; then
    echo 'Unsupported Build System!' > /dev/stderr
    exit 1
fi

# Install Dependencies
apt-get update
apt-get install -y \
    build-essential \
    g++-aarch64-linux-gnu \
    flex \
    texinfo \
    help2man \
    gawk \
    libtool-bin \
    bison

# Versions
CT_NAME='crosstool-ng'
CT_VERSION='1.27.0'
CT="${CT_NAME}-${CT_VERSION}"

# Source Files
SRC="$(pwd)/src"

# Create Workspace
dir() {
    rm -rf "$1"
    mkdir "$1"
    cd "$1"
}
dir workspace
WORKSPACE="$(pwd)"

# Build crosstools-ng
dir "${CT_NAME}"
wget "https://github.com/${CT_NAME}/${CT_NAME}/releases/download/${CT}/${CT}.tar.xz"
tar -xJf "${CT}.tar.xz" --strip-components=1
./configure \
    --enable-local \
    --enable-silent-rules \
    --quiet
make -j$(nproc)

# Add Patch
cd packages/binutils
patch() {
    for version in */; do
        cp "${SRC}/$1" "${version}"
    done
}
patch 9999-change-page-size.patch

# Configure Toolchain
cd "${WORKSPACE}"
export PATH="$(pwd)/${CT_NAME}:${PATH}"
dir build
prepare() {
    dir "$1"
    cp "${SRC}/defconfig" .
    printf "$2" >> defconfig
    ct-ng defconfig
    ct-ng show-config
    chmod -R o+rw .
    cd ../
}
prepare x86_64 ''
prepare aarch64 'CT_CANADIAN=y\nCT_HOST="aarch64-linux-gnu"\n'