#!/usr/bin/env bash

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

export LIBRARY_PATH=""

DESC=gcc
source tools/tools.sh

`tools/osxcross_conf.sh`

# GCC version to build
# (<4.7 will not work properly with libc++)
GCC_VERSION=4.8.2

# GCC mirror
GCC_MIRROR="ftp://ftp.gwdg.de/pub/misc/gcc/releases"

set +e
require wget
set -e

pushd $OSXCROSS_BUILD_DIR &>/dev/null

function remove_locks()
{
    rm -rf $OSXCROSS_BUILD_DIR/have_gcc*
}

source $BASE_DIR/tools/trap_exit.sh

if [ ! -f "have_gcc_${GCC_VERSION}_${OSXCROSS_TARGET}" ]; then

pushd $OSXCROSS_TARBALL_DIR &>/dev/null
wget -c "$GCC_MIRROR/gcc-$GCC_VERSION/gcc-$GCC_VERSION.tar.bz2"
popd &>/dev/null

echo "cleaning up ..."
rm -rf gcc* 2>/dev/null

echo "extracting gcc ..."
tar xf "$OSXCROSS_TARBALL_DIR/gcc-$GCC_VERSION.tar.bz2"

pushd gcc*$GCC_VERSION* &>/dev/null

rm -f $OSXCROSS_TARGET_DIR/bin/*-gcc*
rm -f $OSXCROSS_TARGET_DIR/bin/*-g++*

mkdir -p build
pushd build &>/dev/null

if [ "`uname -s`" == "FreeBSD" ]; then
    export CPATH="/usr/local/include"
    export LDFLAGS="-L/usr/local/lib $LDFLAGS"
    MAKE=gmake
    IS_FREEBSD=1
else
    MAKE=make
    IS_FREEBSD=0
fi

require $MAKE

../configure \
    --target=x86_64-apple-$OSXCROSS_TARGET \
    --with-ld=$OSXCROSS_TARGET_DIR/bin/x86_64-apple-$OSXCROSS_TARGET-ld \
    --with-as=$OSXCROSS_TARGET_DIR/bin/x86_64-apple-$OSXCROSS_TARGET-as \
    --with-sysroot=$OSXCROSS_SDK \
    --disable-nls \
    --enable-languages=c,c++,objc,obj-c++ \
    --without-headers \
    --enable-multilib \
    --enable-lto \
    --enable-checking=release \
    --prefix=$OSXCROSS_TARGET_DIR

$MAKE -j$JOBS
$MAKE install -j$JOBS

popd &>/dev/null # build
popd &>/dev/null # gcc

touch "have_gcc_${GCC_VERSION}_${OSXCROSS_TARGET}"

fi # have gcc

popd &>/dev/null # build dir

WRAPPER=$OSXCROSS_TARGET_DIR/bin/x86_64-apple-${OSXCROSS_TARGET}-ogcc
cp ogcc/ogcc $WRAPPER

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

pushd $WRAPPER_DIR &>/dev/null

if [ ! -f i386-apple-$OSXCROSS_TARGET-base-gcc ]; then
    mv x86_64-apple-$OSXCROSS_TARGET-gcc x86_64-apple-$OSXCROSS_TARGET-base-gcc
    mv x86_64-apple-$OSXCROSS_TARGET-g++ x86_64-apple-$OSXCROSS_TARGET-base-g++

    ln -sf x86_64-apple-$OSXCROSS_TARGET-base-gcc i386-apple-$OSXCROSS_TARGET-base-gcc
    ln -sf x86_64-apple-$OSXCROSS_TARGET-base-g++ i386-apple-$OSXCROSS_TARGET-base-g++
fi

ln -sf $WRAPPER_SCRIPT o32-gcc
ln -sf $WRAPPER_SCRIPT o32-g++
ln -sf $WRAPPER_SCRIPT o32-g++-libc++

ln -sf $WRAPPER_SCRIPT o64-gcc
ln -sf $WRAPPER_SCRIPT o64-g++
ln -sf $WRAPPER_SCRIPT o64-g++-libc++

ln -sf $WRAPPER_SCRIPT i386-apple-$OSXCROSS_TARGET-gcc
ln -sf $WRAPPER_SCRIPT i386-apple-$OSXCROSS_TARGET-g++
ln -sf $WRAPPER_SCRIPT i386-apple-$OSXCROSS_TARGET-g++-libc++

ln -sf $WRAPPER_SCRIPT x86_64-apple-$OSXCROSS_TARGET-gcc
ln -sf $WRAPPER_SCRIPT x86_64-apple-$OSXCROSS_TARGET-g++
ln -sf $WRAPPER_SCRIPT x86_64-apple-$OSXCROSS_TARGET-g++-libc++

popd &>/dev/null # wrapper dir

echo ""

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

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

echo ""

echo "Done! Now you can use o32-gcc/o32-g++ and o64-gcc/o64-g++ as compiler"
echo ""
echo "Example usage:"
echo ""
echo "Example 1: CC=o32-gcc ./configure --host=i386-apple-$OSXCROSS_TARGET"
echo "Example 2: CC=i386-apple-$OSXCROSS_TARGET-gcc ./configure --host=i386-apple-$OSXCROSS_TARGET"
echo "Example 3: o64-gcc -Wall test.c -o test"
echo "Example 4: x86_64-apple-$OSXCROSS_TARGET-strip -x test"
echo ""