#!/usr/bin/env bash

set -e

# Step 1. Download GCC and binutils source code
ADACASIO_BINUTILS_VERSION="2.46.0"
ADACASIO_GCC_VERSION="15.2.0"
ADACASIO_BINUTILS_URL="https://ftp.gnu.org/gnu/binutils/binutils-$ADACASIO_BINUTILS_VERSION.tar.gz"
ADACASIO_GCC_URL="https://ftp.gnu.org/gnu/gcc/gcc-15.2.0/gcc-$ADACASIO_GCC_VERSION.tar.gz"
ADACASIO_PREFIX="$(pwd)/sysroot"
ADACASIO_TARGET="sh-elf"

# prepare configure and build enviornment
wget -O binutils.tar.gz $ADACASIO_BINUTILS_URL
wget -O gcc.tar.gz $ADACASIO_GCC_URL
tar -xf binutils.tar.gz
tar -xf gcc.tar.gz

# Got the command list from https://git.planet-casio.com/Lephenixnoir/sh-elf-binutils Method 3
# Step 2. configure and build GCC and binutils
mkdir build-binutils build-gcc $ADACASIO_PREFIX
cd build-binutils
../binutils-*/configure \
  --prefix="$ADACASIO_PREFIX" \
  --target="sh3eb-elf" \
  --with-multilib-list="m3,m4-nofpu" \
  --program-prefix="$ADACASIO_TARGET-" \
  --enable-libssp \
  --enable-lto

make -j$(nproc)
make install-strip

# Build GCC the same way as Lephenixnoir does but also add ada
# https://git.planet-casio.com/Lephenixnoir/sh-elf-gcc

cd ../build-gcc/
../gcc-$VERSION/configure \
  --prefix="$SYSROOT" \
  --target="sh3eb-elf" \
  --with-multilib-list="m3,m4-nofpu" \
  --enable-languages="c,c++,ada" \
  --disable-libada \
  --without-headers \
  --program-prefix="sh-elf-" \
  --enable-libssp \
  --enable-lto \
  --enable-clocale="generic" \
  --enable-libstdcxx-allocator \
  --disable-threads \
  --disable-libstdcxx-verbose \
  --enable-cxx-flags="-fno-exceptions"

make -j$(nproc) all-gcc all-target-libgcc
make install-strip-gcc install-strip-target-libgcc

# TODO:
# install openlibm and fxlibc for C++ support later on