#!/usr/bin/env bash

pushd "${0%/*}" &>/dev/null

source tools/tools.sh

# find sdk version to use
function guess_sdk_version()
{
  tmp1=
  tmp2=
  tmp3=
  file=
  sdk=
  guess_sdk_version_result=
  sdkcount=`find -L tarballs/ -type f | grep MacOSX | wc -l`
  if [ $sdkcount -eq 0 ]; then
    echo no SDK found in 'tarballs/'. please see README.md
    exit 1
  elif [ $sdkcount -gt 1 ]; then
    sdks=`find tarballs/ | grep MacOSX`
    for sdk in $sdks; do echo $sdk; done
    echo 'more than one MacOSX SDK tarball found. please set'
    echo 'SDK_VERSION environment variable for the one you want'
    echo '(for example: SDK_VERSION=10.x [OSX_VERSION_MIN=10.x] ./build.sh)'
    exit 1
  else
    sdk=`find tarballs/ | grep MacOSX`
    tmp2=`echo ${sdk/bz2/} | sed s/[^0-9.]//g`
    tmp3=`echo $tmp2 | sed s/\\\.*$//g`
    guess_sdk_version_result=$tmp3
    echo 'found SDK version' $guess_sdk_version_result 'at tarballs/'`basename $sdk`
  fi
  if [ $guess_sdk_version_result ]; then
    if [ $guess_sdk_version_result = 10.4 ]; then
      guess_sdk_version_result=10.4u
    fi
  fi
  export guess_sdk_version_result
}

# make sure there is actually a file with the given SDK_VERSION
function verify_sdk_version()
{
  sdkv=$1
  for file in tarballs/*; do
    if [ `echo $file | grep OSX.*$sdkv` ]; then
      echo "verified at "$file
      sdk=$file
    fi
  done
  if [ ! $sdk ] ; then
    echo cant find SDK for OSX $sdkv in tarballs. exiting
    exit
  fi
}

if [ $SDK_VERSION ]; then
  echo 'SDK VERSION set in environment variable:' $SDK_VERSION
  test $SDK_VERSION = 10.4 && SDK_VERSION=10.4u
else
  guess_sdk_version
  SDK_VERSION=$guess_sdk_version_result
fi
verify_sdk_version $SDK_VERSION

# Minimum targeted OS X version
# Must be <= SDK_VERSION
# You can comment this variable out,
# if you want to use the compiler's default value
if [ -z "$OSX_VERSION_MIN" ]; then
  if [ $SDK_VERSION = 10.4u ]; then
    OSX_VERSION_MIN=10.4
  else
    OSX_VERSION_MIN=10.5
  fi
fi

# Don't change this
OSXCROSS_VERSION=0.8

TARBALL_DIR=$BASE_DIR/tarballs
BUILD_DIR=$BASE_DIR/build
TARGET_DIR=$BASE_DIR/target
PATCH_DIR=$BASE_DIR/patches
SDK_DIR=$TARGET_DIR/SDK

if [ -z "$OSX_VERSION_MIN" ]; then
  OSX_VERSION_MIN="default"
fi

case $SDK_VERSION in
  10.4*) TARGET=darwin8 ;;
  10.5*) TARGET=darwin9 ;;
  10.6*) TARGET=darwin10 ;;
  10.7*) TARGET=darwin11 ;;
  10.8*) TARGET=darwin12 ;;
  10.9*) TARGET=darwin13 ;;
  *) echo "Invalid SDK Version" && exit 1 ;;
esac

export TARGET

echo ""
echo "Building OSXCross toolchain, Version: $OSXCROSS_VERSION"
echo ""
echo "OS X SDK Version: $SDK_VERSION, Target: $TARGET"
echo "Minimum targeted OS X Version: $OSX_VERSION_MIN"
echo "Tarball Directory: $TARBALL_DIR"
echo "Build Directory: $BUILD_DIR"
echo "Install Directory: $TARGET_DIR"
echo "SDK Install Directory: $SDK_DIR"
echo ""
read -p "Press enter to start building"
echo ""

export PATH=$TARGET_DIR/bin:$PATH

mkdir -p $BUILD_DIR
mkdir -p $TARGET_DIR
mkdir -p $SDK_DIR

require $CC
require $CXX
require clang
require patch
require sed
require gunzip
require cpio

if [ "$PLATFORM" != "Darwin" ]; then
  require autogen
  require automake
  require libtool
fi

pushd $BUILD_DIR &>/dev/null

function remove_locks()
{
  rm -rf $BUILD_DIR/have_cctools*
}

source $BASE_DIR/tools/trap_exit.sh

# CCTOOLS
if [ "$PLATFORM" != "Darwin" ]; then

res=`check_cxx_stdlib`

if [ $res -ne 0 ]; then
  echo "Your C++ standard library is either broken or too old to build ld64-236.3"
  echo "Building ld64-134.9 instead"
  echo ""
  sleep 3
  LINKER_VERSION=134.9
else
  LINKER_VERSION=236.3
fi

CCTOOLS="cctools-855-ld64-$LINKER_VERSION"
CCTOOLS_TARBALL=`ls $TARBALL_DIR/$CCTOOLS*.tar.* | head -n1`
CCTOOLS_REVHASH=`echo "$CCTOOLS_TARBALL" head -n1 | tr '_' ' ' | tr '.' ' ' | awk '{print $3}'`

if [ ! -f "have_cctools_${CCTOOLS_REVHASH}_$TARGET" ]; then

rm -rf cctools*
rm -rf xar*
rm -rf bc*

extract $CCTOOLS_TARBALL 1

pushd cctools*/cctools &>/dev/null
pushd .. &>/dev/null
if [ $LINKER_VERSION != "134.9" ]; then
  # fix compiling ld64 with libc++
  patch -p0 < $PATCH_DIR/cctools-e3cbeaf.patch
  # check for __cxa_demangle in -lstdc++
  patch -p0 < $PATCH_DIR/cctools-499e470.patch
else
  # __cxa_demangle + 3.5 build fix
  patch -p0 < $PATCH_DIR/cctools-a78597e.patch
fi
if [ "$PLATFORM" == "Linux" ]; then
  patch -p0 < $PATCH_DIR/cctools-old-linux.patch
fi
# fix LD_LIBRARY_PATH
patch -p0 < $PATCH_DIR/cctools-f7a5930.patch
popd &>/dev/null
patch -p0 < $PATCH_DIR/cctools-ld64-1.patch
patch -p0 < $PATCH_DIR/cctools-ld64-2.patch
echo ""
./autogen.sh
./configure --prefix=$TARGET_DIR --target=x86_64-apple-$TARGET
$MAKE -j$JOBS
$MAKE install -j$JOBS
popd &>/dev/null

pushd $TARGET_DIR/bin &>/dev/null
CCTOOLS=`find . -name "x86_64-apple-darwin*"`
CCTOOLS=($CCTOOLS)
for CCTOOL in ${CCTOOLS[@]}; do
  CCTOOL_I386=`echo "$CCTOOL" | sed 's/x86_64/i386/g'`
  ln -sf $CCTOOL $CCTOOL_I386
done
popd &>/dev/null

fi
else
# Darwin
LINKER_VERSION="`get_ld_version`"
fi
# CCTOOLS END

# BC
set +e
which bc &>/dev/null
NEED_BC=$?
set -e

if [ $NEED_BC -ne 0 ]; then

extract $TARBALL_DIR/bc*.tar.bz2 2

pushd bc* &>/dev/null
CFLAGS="-w" ./configure --prefix=$TARGET_DIR --without-flex
$MAKE -j$JOBS
$MAKE install -j$JOBS
popd &>/dev/null

fi
# BC END

SDK=`ls $TARBALL_DIR/MacOSX$SDK_VERSION*`

# XAR
if [[ $SDK == *.pkg ]]; then

set +e
which xar &>/dev/null
NEED_XAR=$?
set -e

if [ $NEED_XAR -ne 0 ]; then

extract $TARBALL_DIR/xar*.tar.gz 2

pushd xar* &>/dev/null
test "`uname -s`" = "NetBSD" && patch -p0 -l < $PATCH_DIR/xar-netbsd.patch
CFLAGS+=" -w" ./configure --prefix=$TARGET_DIR
$MAKE -j$JOBS
$MAKE install -j$JOBS
popd &>/dev/null

fi
fi
# XAR END

if [ "$PLATFORM" != "Darwin" ]; then
if [ ! -f "have_cctools_$TARGET" ]; then

function check_cctools()
{
  [ -f "/$TARGET_DIR/bin/$1-apple-$TARGET-lipo" ] || exit 1
  [ -f "/$TARGET_DIR/bin/$1-apple-$TARGET-ld" ] || exit 1
  [ -f "/$TARGET_DIR/bin/$1-apple-$TARGET-nm" ] || exit 1
  [ -f "/$TARGET_DIR/bin/$1-apple-$TARGET-ar" ] || exit 1
  [ -f "/$TARGET_DIR/bin/$1-apple-$TARGET-ranlib" ] || exit 1
  [ -f "/$TARGET_DIR/bin/$1-apple-$TARGET-strip" ] || exit 1
}

check_cctools i386
check_cctools x86_64

touch "have_cctools_${CCTOOLS_REVHASH}_$TARGET"

echo ""

fi # HAVE_CCTOOLS
fi

set +e
ls $TARBALL_DIR/MacOSX$SDK_VERSION* &>/dev/null
while [ $? -ne 0 ]
do
  echo ""
  echo "Get the MacOSX$SDK_VERSION SDK and move it into $TARBALL_DIR"
  echo "(see README for SDK download links)"
  echo ""
  echo "You can press ctrl-c to break the build process,"
  echo "if you restart ./build.sh then we will continue from here"
  echo ""
  read -p "Press enter to continue"
  ls $TARBALL_DIR/MacOSX$SDK_VERSION* &>/dev/null
done
set -e

extract $SDK 1 1

rm -rf $SDK_DIR/MacOSX$SDK_VERSION* 2>/dev/null

if [ "`ls -l SDKs/*$SDK_VERSION* 2>/dev/null | wc -l | tr -d ' '`" != "0" ]; then
  mv -f SDKs/*$SDK_VERSION* $SDK_DIR
else
  mv -f *OSX*$SDK_VERSION*sdk* $SDK_DIR
fi

pushd $SDK_DIR/MacOSX$SDK_VERSION.sdk &>/dev/null
set +e
ln -s \
  $SDK_DIR/MacOSX$SDK_VERSION.sdk/System/Library/Frameworks/Kernel.framework/Versions/A/Headers/std*.h \
  usr/include 2>/dev/null
test ! -f "usr/include/float.h" && cp -f $BASE_DIR/oclang/quirks/float.h usr/include
set -e
popd &>/dev/null

popd &>/dev/null

OSXCROSS_CONF="$TARGET_DIR/bin/osxcross-conf"
OSXCROSS_ENV="$TARGET_DIR/bin/osxcross-env"

rm -f $OSXCROSS_CONF $OSXCROSS_ENV

echo "compiling wrapper ..."

export OSXCROSS_VERSION
export OSXCROSS_TARGET=$TARGET
export OSXCROSS_OSX_VERSION_MIN=$OSX_VERSION_MIN
export OSXCROSS_LINKER_VERSION=$LINKER_VERSION

if [ "$PLATFORM" != "Darwin" ]; then
  # libLTO.so
  export OSXCROSS_LIBLTO_PATH=`cat $BUILD_DIR/cctools*/cctools/tmp/ldpath 2>/dev/null`
  export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:$OSXCROSS_LIBLTO_PATH"
fi

$BASE_DIR/wrapper/build.sh 1>/dev/null

echo ""

if [ "$OSX_VERSION_MIN" != "default" ]; then
  if [ `echo "${SDK_VERSION/u/}<$OSX_VERSION_MIN" | bc -l` -eq 1 ]; then
    echo "OSX_VERSION_MIN must be <= SDK_VERSION"
    trap "" EXIT
    exit 1
  elif [ `echo "$OSX_VERSION_MIN<10.4" | bc -l` -eq 1  ]; then
    echo "OSX_VERSION_MIN must be >= 10.4"
    trap "" EXIT
    exit 1
  fi
fi

test_compiler o32-clang $BASE_DIR/oclang/test.c
test_compiler o64-clang $BASE_DIR/oclang/test.c

test_compiler o32-clang++ $BASE_DIR/oclang/test.cpp
test_compiler o64-clang++ $BASE_DIR/oclang/test.cpp

if [ `echo "${SDK_VERSION/u/}>=10.7" | bc -l` -eq 1 ]; then
  if [ ! -d "$SDK_DIR/MacOSX$SDK_VERSION.sdk/usr/include/c++/v1" ]; then
    echo ""
    echo -n "Given SDK does not contain libc++ headers "
    echo "(-stdlib=libc++ test may fail)"
    echo -n "You may want to re-package your SDK using "
    echo "'tools/gen_sdk_package.sh' on OS X"
  fi
  echo ""
  test_compiler_cxx11 o32-clang++ $BASE_DIR/oclang/test_libcxx.cpp
  test_compiler_cxx11 o64-clang++ $BASE_DIR/oclang/test_libcxx.cpp
fi

set +e
HAVE_CSH=0
which csh &>/dev/null
[ $? -eq 0 ] && HAVE_CSH=1

if [ $HAVE_CSH -eq 0 ]; then
  which tcsh &>/dev/null
  [ $? -eq 0 ] && HAVE_CSH=1
fi

CSHRC=""
[ $HAVE_CSH -eq 1 ] && CSHRC=", ~/.cshrc"
set -e

echo ""
echo "Now add"
echo ""
echo -e "\x1B[32m\`$OSXCROSS_ENV\`\x1B[0m"
echo ""
if [ $HAVE_CSH -eq 1 ]; then
echo "or in case of csh:"
echo ""
echo -e "\x1B[32msetenv PATH \`$OSXCROSS_ENV -v=PATH\`\x1B[0m"
echo -e "\x1B[32msetenv LD_LIBRARY_PATH \`$OSXCROSS_ENV -v=LD_LIBRARY_PATH\`\x1B[0m"
echo ""
fi
echo "to your ~/.bashrc${CSHRC} or ~/.profile (including the '\`')"
echo ""

echo "Done! Now you can use o32-clang(++) and o64-clang(++) like a normal compiler"
echo ""
echo "Example usage:"
echo ""
echo "Example 1: CC=o32-clang ./configure --host=i386-apple-$TARGET"
echo "Example 2: CC=i386-apple-$TARGET-clang ./configure --host=i386-apple-$TARGET"
echo "Example 3: o64-clang -Wall test.c -o test"
echo "Example 4: x86_64-apple-$TARGET-strip -x test"
echo ""