#!/bin/bash

. ./libretro-config.sh

# BSDs don't have readlink -f
read_link()
{
   TARGET_FILE="$1"
   cd $(dirname "$TARGET_FILE")
   TARGET_FILE=$(basename "$TARGET_FILE")

   while [ -L "$TARGET_FILE" ]
   do
      TARGET_FILE=$(readlink "$TARGET_FILE")
      cd $(dirname "$TARGET_FILE")
      TARGET_FILE=$(basename "$TARGET_FILE")
   done

   PHYS_DIR=$(pwd -P)
   RESULT="$PHYS_DIR/$TARGET_FILE"
   echo $RESULT
}

SCRIPT=$(read_link "$0")
echo "Script: $SCRIPT"
BASE_DIR=$(dirname "$SCRIPT")
if [ -z "$RARCH_DIST_DIR" ]; then
   RARCH_DIR="$BASE_DIR/dist"
   RARCH_DIST_DIR="$RARCH_DIR/$DIST_DIR"
fi

if [ -z "$JOBS" ]; then
   JOBS=4
fi

die()
{
   echo $1
   #exit 1
}

if [ "$HOST_CC" ]; then
   CC="${HOST_CC}-gcc"
   CXX="${HOST_CC}-g++"
   STRIP="${HOST_CC}-strip"
fi

if [ -z "$MAKE" ]; then
   if [ "$(expr substr $(uname -s) 1 7)" = "MINGW32" ]; then
      MAKE=mingw32-make
   else
      MAKE=make
   fi
fi

if [ -z "$CC" ]; then
	if [ $FORMAT_COMPILER_TARGET = "osx" ]; then
		CC=clang
   elif [ "$(expr substr $(uname -s) 1 7)" = "MINGW32" ]; then
      CC=mingw32-gcc
   else
      CC=gcc
   fi
fi

if [ -z "$CXX" ]; then
	if [ $FORMAT_COMPILER_TARGET = "osx" ]; then
		CXX=clang++
   elif [ "$(expr substr $(uname -s) 1 7)" = "MINGW32" ]; then
      CXX=mingw32-g++
   else
      CXX=g++
   fi
fi

echo "CC = $CC"
echo "CXX = $CXX"
echo "STRIP = $STRIP"

mkdir -p "$RARCH_DIST_DIR"

export RARCHCFLAGS=""

check_deps()
{
   if [ $ENABLE_GLES ]; then
      echo "=== Enabling OpenGL ES ==="
      export ENABLE_GLES="--enable-gles"
   fi
   if [ $ARM_NEON ]; then
      echo "=== Enabling ARM NEON support ==="
      export ENABLE_NEON="--enable-neon"
   fi

   if [ $ARM_HARDFLOAT ]; then
      echo "=== Enabling ARM Hard float ABI support ==="
      export RARCHCFLAGS="${RARCHCFLAGS} -mfloat-abi=hard"
   fi
   if [ $ARM_SOFTFLOAT ]; then
      echo "=== Enabling ARM Soft float ABI support ==="
      export RARCHCFLAGS="${RARCHCFLAGS} -mfloat-abi=softfp"
   fi
   if [ "$CORTEX_A8" ]; then
      echo "=== Enabling Cortex A8 CFLAGS ==="
      export RARCHCFLAGS="${RARCHCFLAGS} -mcpu=cortex-a8 -mtune=cortex-a8"
   fi
   if [ "$CORTEX_A9" ]; then
      echo "=== Enabling Cortex A9 CFLAGS ==="
      export RARCHCFLAGS="${RARCHCFLAGS} -mcpu=cortex-a9 -mtune=cortex-a9"
   fi

   if [ $ARM_NEON ]; then
      echo "=== Enabling ARM NEON support (CFLAGS) ==="
      export RARCHCFLAGS="${RARCHCFLAGS} -mfpu=neon"
   fi
}

build_retroarch()
{
   cd "$BASE_DIR"
   pwd
   if [ -d "retroarch" ]; then
      echo "=== Building RetroArch ==="
      cd retroarch
      check_deps
      ./configure $ENABLE_GLES $ENABLE_NEON
      ${MAKE} -f Makefile platform=${FORMAT_COMPILER_TARGET} CC="gcc ${RARCHCFLAGS}" $COMPILER -j$JOBS clean || die "Failed to clean RetroArch"
      ${MAKE} -f Makefile platform=${FORMAT_COMPILER_TARGET} CC="gcc ${RARCHCFLAGS}" $COMPILER -j$JOBS || die "Failed to build RetroArch"
   else
      echo "RetroArch not fetched, skipping ..."
   fi
}

if [ $1 ]; then
   $1
else
   build_retroarch
fi