#!/usr/bin/env bash

pushd "${0%/*}" &>/dev/null
eval `./osxcross-env`
eval `./osxcross-conf`
popd &>/dev/null

type=`basename $0`

if [[ $type == *o64* ]] || [[ $type == *x86_64* ]]; then
    ARCH1="x86_64"
    ARCH2=$ARCH1
else
    if [[ $type == *o32* ]] || [[ $type == *i386* ]]; then
        ARCH1="i386"
        ARCH2="i686"
    else
        echo "unknown arch"
        exit 1
    fi
fi

if [[ $type == *++* ]]; then
    COMPILER="clang++"
else
    COMPILER="clang"
fi

if [ $COMPILER == "clang++" ] && [[ $type == *libc++* ]]; then
    USE_LIBCXX=1
else
    USE_LIBCXX=0
fi

TARGET=$ARCH1-apple-$OSXCROSS_TARGET
OSX_VERSION_MIN=$OSXCROSS_OSX_VERSION_MIN

if [ $# -gt 0 ]; then
    for p in "$@"
    do
        if [[ "$p" == -mmacosx-version-min=* ]]; then
            OSXCROSS_OSX_VERSION_MIN="default"
            OSX_VERSION_MIN=`echo "$p" | tr '=' ' ' | awk '{print $2}'`
            continue
        fi
        if [ "$p" == "-stdlib=libc++" ]; then
            USE_LIBCXX=2
            continue
        fi
        if [ "$p" == "-v" ] || [ "$p" == "--version" ]; then
            if [ $# -eq 1 ]; then
                $COMPILER $OSXCROSS_TARGET_OPTION $TARGET $p
                exit $?
            fi
        fi
    done
else
    $COMPILER $OSXCROSS_TARGET_OPTION $TARGET
    exit $?
fi

if [ $OSXCROSS_OSX_VERSION_MIN != "default" ]; then
    OSX_VERSION_MIN_OPT="-mmacosx-version-min=$OSXCROSS_OSX_VERSION_MIN"
else
    OSX_VERSION_MIN_OPT=""
fi

export COMPILER_PATH="$OSXCROSS_CCTOOLS_PATH:$COMPILER_PATH"

STDINC=$OSXCROSS_SDK/usr/include

if [ -n "$BUILD_LIBCXX" ]; then
    if [ $BUILD_LIBCXX -eq 1 ]; then
        # TODO: Write a fake libc++ library (without any symbols)
        # once libstdc++ disappears from the SDK.
        # Newer versions of clang default to libc++ for >= 10.9,
        # so configuring libc++ fails because of the hardcoded
        # -lc++ ... (at least with cmake).

        OSXCROSS_OPT_ARGS="$OSXCROSS_OPT_ARGS -stdlib=libstdc++"
    fi

    USE_LIBCXX=0
else
    if [ $USE_LIBCXX -eq 0 ]; then
        MIN_TARGET_VERSION=`echo "$OSX_VERSION_MIN" | tr '.' ' ' | awk '{printf "%d %d", $1, $2}'`
        MIN_TARGET_VERSION_MAJOR=`echo $MIN_TARGET_VERSION | awk '{print $1}'`
        MIN_TARGET_VERSION_MINOR=`echo $MIN_TARGET_VERSION | awk '{print $2}'`

        if [ $MIN_TARGET_VERSION_MAJOR -ge 10 ] && [ $MIN_TARGET_VERSION_MINOR -ge 9 ]; then
            # default to libc++ on >= 10.9
            USE_LIBCXX=1
        fi
    fi
fi

if [ $USE_LIBCXX -ne 0 ]; then
    if [ ! -f "$OSXCROSS_SDK/../libcxx_$OSXCROSS_SDK_VERSION/lib/libc++.a" ]; then
        echo -e "\e[1mosxcross \e[31merror:\e[0m\e[1m you must build libc++ before you can use it (./build_libcxx.sh)\e[0m" 1>&2
        exit 1
    fi

    CXXINC="-nostdinc++ -cxx-isystem $OSXCROSS_SDK/../libcxx_$OSXCROSS_SDK_VERSION/include/c++/v1"

    if [ $USE_LIBCXX -eq 1 ]; then
        CXXINC="$CXXINC -stdlib=libc++"
    fi

    REGEX="\-o\s*[^ ]+\.gch"
    if [[ ! "$@" =~ $REGEX ]]; then
        if [[ $COMPILER == *clang++* ]]; then
            CXXINC="$CXXINC -Qunused-arguments -lc++abi"
        fi
        CXXINC="$CXXINC -L$OSXCROSS_SDK/../libcxx_$OSXCROSS_SDK_VERSION/lib"
    fi
else
    CXXINC="-cxx-isystem $OSXCROSS_SDK/usr/lib/gcc/i686-apple-$OSXCROSS_TARGET/4.2.1/include"
    CXXINC="$CXXINC -cxx-isystem $OSXCROSS_SDK/usr/include/c++/4.0.0 "
    CXXINC="$CXXINC -cxx-isystem $OSXCROSS_SDK/usr/include/c++/4.0.0/$ARCH2-apple-darwin9 "
fi

XMMINTRIN=`readlink "$STDINC/xmmintrin.h"`
if [ $? -eq 0 ] && [ ! -f "$XMMINTRIN" ]; then
    pushd "${0%/*}" &>/dev/null
    if [ -f "osxcross-fix-intrinsic-headers" ]; then
        echo -e "\e[1mosxcross:\e[0m\e[35m fixing intrinsic symlinks...\e[0m" 1>&2
        ./osxcross-fix-intrinsic-headers $OSXCROSS_SDK || { echo -e "\e[31mfailed.\e[0m" 1>&2 && exit 1; }
        echo -e "\e[1mdone.\e[0m" 1>&2
    else
        echo -e "\e[1mosxcross \e[31merror:\e[0m\e[1m dead intrinsic link found - please re-run ./build.sh\e[0m" 1>&2 
        exit 1
    fi
fi

$COMPILER \
    $OSXCROSS_TARGET_OPTION $TARGET -isysroot $OSXCROSS_SDK \
    $CXXINC $OSX_VERSION_MIN_OPT -mlinker-version=$OSXCROSS_LINKER_VERSION \
    $OSXCROSS_OPT_ARGS ${1+"$@"}

exit $?