#!/usr/bin/env bash

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

source tools/tools.sh

# SDK version to use
SDK_VERSION=10.8

# Minimum targeted OS X version
# Must be <= SDK_VERSION
# You can comment this variable out,
# if you want to use the compilers default value
OSX_VERSION_MIN=10.5

# ld version
LINKER_VERSION=134.9

# Don't change this
OSXCROSS_VERSION=0.5

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

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

set +e
require $CC
require $CXX
require clang
require make
require sed
require patch
require gunzip
require cpio
require autogen
require automake
require libtool
set -e

CLANG_TARGET_OPTION=`./oclang/check_target_option.sh`

pushd $BUILD_DIR &>/dev/null

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

source $BASE_DIR/tools/trap_exit.sh

if [ "`ls $TARBALL_DIR/cctools*.tar.* | wc -l | tr -d ' '`" != "1" ]; then
    echo ""
    echo "There should only be one cctools*.tar.* archive in the tarballs directory"
    echo ""
    exit 1
fi

CCTOOLS_REVHASH=`ls $TARBALL_DIR/cctools*.tar.* | \
                 tr '_' ' ' | tr '.' ' ' | \
                 awk '{print $3}'`

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

rm -rf cctools*
rm -rf xar*

tar xJfv $TARBALL_DIR/cctools*.tar.xz
tar xzfv $TARBALL_DIR/xar*.tar.gz

pushd cctools*/cctools &>/dev/null
patch -p0 < $PATCH_DIR/cctools-ld64-1.patch
patch -p0 < $PATCH_DIR/cctools-ld64-2.patch
patch -p0 < $PATCH_DIR/cctools-ld64-3.patch
./autogen.sh
echo ""
echo "if you see automake warnings, ignore them"
echo "automake 1.14+ is supposed to print a lot of warnings"
echo ""
./configure --prefix=$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 # have cctools

if [ ! -f "have_xar_$TARGET" ]; then
if [ -n "$FORCE_XAR_BUILD" ] || [ `echo "$SDK_VERSION<=10.5" | bc -l` -eq 1 ]; then

pushd xar* &>/dev/null
set +e
sed -i 's/-Wall/-w/g' configure
set -e
./configure --prefix=$TARGET_DIR
make -j$JOBS
make install -j$JOBS
popd &>/dev/null

fi # SDK <= 10.5
fi # have xar

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"

fi # HAVE_CCTOOLS

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

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

echo "extracting $SDK_FILENAME ..."

case $SDK in
    *.pkg)
        which xar &>/dev/null || { echo "please build with: FORCE_XAR_BUILD=1 ./build.sh" && exit 1; }
        xar -xf $SDK
        cat Payload | gunzip -dc | cpio -i 2>/dev/null
        ;;
    *.tar.xz)
        tar xJf $SDK
        ;;
    *.tar.gz)
        tar xzf $SDK
        ;;
esac

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

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
$BASE_DIR/oclang/find_intrinsic_headers.sh $SDK_DIR/MacOSX$SDK_VERSION.sdk
set -e
popd &>/dev/null

popd &>/dev/null

cp -f oclang/dsymutil $TARGET_DIR/bin

WRAPPER=$TARGET_DIR/bin/x86_64-apple-$TARGET-oclang
cp -f oclang/oclang $WRAPPER

WRAPPER_SCRIPT=`basename $WRAPPER`
WRAPPER_DIR=`dirname $WRAPPER`

pushd $WRAPPER_DIR &>/dev/null

ln -sf $WRAPPER_SCRIPT o32-clang
ln -sf $WRAPPER_SCRIPT o32-clang++
ln -sf $WRAPPER_SCRIPT o32-clang++-libc++

ln -sf $WRAPPER_SCRIPT o64-clang
ln -sf $WRAPPER_SCRIPT o64-clang++
ln -sf $WRAPPER_SCRIPT o64-clang++-libc++

ln -sf $WRAPPER_SCRIPT i386-apple-$TARGET-clang
ln -sf $WRAPPER_SCRIPT i386-apple-$TARGET-clang++
ln -sf $WRAPPER_SCRIPT i386-apple-$TARGET-clang++-libc++

ln -sf $WRAPPER_SCRIPT x86_64-apple-$TARGET-clang
ln -sf $WRAPPER_SCRIPT x86_64-apple-$TARGET-clang++
ln -sf $WRAPPER_SCRIPT x86_64-apple-$TARGET-clang++-libc++

popd &>/dev/null

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

rm -f $OSXCROSS_CONF $ENV_CONF

echo "#!/usr/bin/env bash"                                                                > $OSXCROSS_CONF
echo ""                                                                                  >> $OSXCROSS_CONF
echo "pushd \"\${0%/*}\" &>/dev/null"                                                    >> $OSXCROSS_CONF
echo ""                                                                                  >> $OSXCROSS_CONF
echo "DIR=\`pwd\`"                                                                       >> $OSXCROSS_CONF
echo "OSXCROSS_ROOT=\$DIR/../.."                                                         >> $OSXCROSS_CONF
echo ""                                                                                  >> $OSXCROSS_CONF
echo "echo \"export OSXCROSS_VERSION=$OSXCROSS_VERSION\""                                >> $OSXCROSS_CONF
echo "echo \"export OSXCROSS_OSX_VERSION_MIN=$OSX_VERSION_MIN\""                         >> $OSXCROSS_CONF
echo "echo \"export OSXCROSS_TARGET=$TARGET\""                                           >> $OSXCROSS_CONF
echo "echo \"export OSXCROSS_SDK_VERSION=$SDK_VERSION\""                                 >> $OSXCROSS_CONF
echo "echo \"export OSXCROSS_SDK=\$DIR/../`basename $SDK_DIR`/MacOSX$SDK_VERSION.sdk\""  >> $OSXCROSS_CONF
echo "echo \"export OSXCROSS_TARBALL_DIR=\$OSXCROSS_ROOT/`basename $TARBALL_DIR`\""      >> $OSXCROSS_CONF
echo "echo \"export OSXCROSS_PATCH_DIR=\$OSXCROSS_ROOT/`basename $PATCH_DIR`\""          >> $OSXCROSS_CONF
echo "echo \"export OSXCROSS_TARGET_DIR=\$OSXCROSS_ROOT/`basename $TARGET_DIR`\""        >> $OSXCROSS_CONF
echo "echo \"export OSXCROSS_BUILD_DIR=\$OSXCROSS_ROOT/`basename $BUILD_DIR`\""          >> $OSXCROSS_CONF
echo "echo \"export OSXCROSS_CCTOOLS_PATH=\$DIR\""                                       >> $OSXCROSS_CONF
echo "echo \"export OSXCROSS_TARGET_OPTION=$CLANG_TARGET_OPTION\""                       >> $OSXCROSS_CONF
echo "echo \"export OSXCROSS_LINKER_VERSION=$LINKER_VERSION\""                           >> $OSXCROSS_CONF
echo ""                                                                                  >> $OSXCROSS_CONF
echo "popd &>/dev/null"                                                                  >> $OSXCROSS_CONF
echo ""                                                                                  >> $OSXCROSS_CONF

if [ -f $BUILD_DIR/cctools*/cctools/tmp/ldpath ]; then
    LIB_PATH=:`cat $BUILD_DIR/cctools*/cctools/tmp/ldpath`
else
    LIB_PATH=""
fi

echo "#!/bin/sh"                                                                    > $OSXCROSS_ENV
echo ""                                                                            >> $OSXCROSS_ENV
echo "BDIR=\`readlink -f \\\`dirname \$0\\\`\`"                                    >> $OSXCROSS_ENV
echo ""                                                                            >> $OSXCROSS_ENV
echo "echo \"export PATH=\$PATH:\$BDIR\""                                          >> $OSXCROSS_ENV
echo "echo \"export LD_LIBRARY_PATH=\$LD_LIBRARY_PATH:\$BDIR/../lib${LIB_PATH}"\"  >> $OSXCROSS_ENV

chmod +x $OSXCROSS_CONF $OSXCROSS_ENV

export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:`cat $BUILD_DIR/cctools*/cctools/tmp/ldpath`" # libLTO.so

echo ""

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

echo ""
echo "Now add"
echo ""
echo -e "\e[32m\`$OSXCROSS_ENV\`\e[0m"
echo ""
echo "to your ~/.bashrc 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 ""