#! /usr/bin/env bash

source util.sh

VERSION=$1
PREFIX="$2"
URL="https://ftp.gnu.org/gnu/binutils/binutils-$VERSION.tar.xz"
ARCHIVE=$(basename "$URL")

# Final location of ld in the sysroot
SYSROOT_LD="$SYSROOT/bin/sh-elf-ld"
# Version string of any existing sh-elf-ld in the sysroot
SYSROOT_LD_VERSION=

#---
# Determine what versions are already here and decide whether to skip
#---

if [[ -f "$SYSROOT_LD" ]]; then
  SYSROOT_LD_VERSION=$("$SYSROOT_LD" --version | head -n 1 | grep -Eo '[0-9.]+$')
fi

if [[ "$SYSROOT_LD_VERSION" = "$VERSION" ]]; then
  echo "$TAG binutils $VERSION already installed, skipping rebuild"
  [[ -d build ]] && touch "build/giteapc-skip-rebuild.txt"
  exit 0
fi

if [[ ! -z "$ACCEPT_ANY" && ! -z "$SYSROOT_LD_VERSION" ]]; then
  echo "$TAG binutils $SYSROOT_LD_VERSION is available; skipping as per ACCEPT_ANY"
  [[ -d build ]] && touch "build/giteapc-skip-rebuild.txt"
  exit 0
fi

#---
# Check dependencies for building binutils and GCC, and offer to install them
#---

if command -v pkg >/dev/null 2>&1; then
  deps="libmpfr libmpc libgmp libpng flex clang git texinfo libisl bison xz-utils"
  pm=pkg
  pm_has="dpkg -s"
  pm_install="pkg install"
elif command -v apt >/dev/null 2>&1; then
  deps="libmpfr-dev libmpc-dev libgmp-dev libpng-dev libppl-dev flex g++ git texinfo xz-utils"
  pm=apt
  pm_has="dpkg -s"
  pm_install="sudo apt install"
elif command -v pacman >/dev/null 2>&1; then
  deps="mpfr libmpc gmp libpng ppl flex gcc git texinfo xz"
  pm=pacman
  pm_has="pacman -Qi"
  pm_install="sudo pacman -S"
else
  trust_deps=1
fi

missing=""
if [[ -z "$trust_deps" ]]; then
  for d in $deps; do
    if ! $pm_has $d >/dev/null 2>&1; then
      missing="$missing $d"
    fi
  done
fi

if [[ ! -z "$missing" ]]; then
  echo "$TAG Based on $pm, some dependencies are missing: $missing"
  echo -n "$TAG Do you want to run '$pm_install $missing' to install them (Y/n)? "

  read do_install
  if [[ "$do_install" = "y" || "$do_install" = "Y" || "$do_install" = "" ]]; then
    $pm_install $missing
  else
    echo "$TAG Skipping dependencies, hoping it will build anyway."
  fi
fi

#---
# Get sources
#---

if [[ -f "$ARCHIVE" ]]; then
  echo "$TAG Found $ARCHIVE, skipping download"
else
  echo "$TAG Downloading $URL..."
  if command -v curl >/dev/null 2>&1; then
    curl "$URL" -o "$ARCHIVE"
  elif command -v wget >/dev/null 2>&1; then
    wget -q --show-progress "$URL" -O "$ARCHIVE"
  else
    echo "$TAG error: no curl or wget; install one or download archive yourself" >&2
    exit 1
  fi
fi

# Extract archive (OpenBSD-compliant version)
echo "$TAG Extracting $ARCHIVE..."
unxz -c < "$ARCHIVE" | tar -xf -

# Touch intl/plural.c to avoid regenerating it from intl/plural.y with recent
# versions of bison, which is subject to the following known bug.
# * https://sourceware.org/bugzilla/show_bug.cgi?id=22941
# * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92008
touch "binutils-$VERSION/intl/plural.c"

#---
# Configure
#---

# We install in the sysroot and then symlink to the PREFIX folder in the path
[[ -d "build" ]] && rm -rf build
mkdir build && cd build

echo "$TAG Configuring binutils..."

if command -v termux-setup-storage >/dev/null 2>&1; then
  # Since the __ANDROID_API__ flag is hardcoded as 24 in clang, and <stdio.h>
  # doesn't prototype some functions when this flag is too low, fixes it's
  # version by checking system's properties so as to prevent from missing prototypes
  # of existing functions such as fgets_unlocked (only if API >= 28)
  # See the following issues :
  # * https://github.com/termux/termux-packages/issues/6176
  # * https://github.com/termux/termux-packages/issues/2469

  export CFLAGS="-D__ANDROID_API__=$(getprop ro.build.version.sdk) -g -O2" \
  CXXFLAGS="-D__ANDROID_API__=$(getprop ro.build.version.sdk) -g -O2"
fi

run_quietly giteapc-configure.log       \
../binutils-$VERSION/configure          \
  --prefix="$SYSROOT"                   \
  --target="sh3eb-elf"                  \
  --with-multilib-list="m3,m4-nofpu"    \
  --program-prefix="sh-elf-"            \
  --enable-libssp                       \
  --enable-lto