#!/bin/sh

#

# Build a fat binary for iOS

# Based on fatbuild.sh and code from the Ignifuga Game Engine

# Number of CPUs (for make -j)

NCPU=`sysctl -n hw.ncpu`

if test x$NJOB = x; then

    NJOB=$NCPU

fi

# SDK path

XCODE_PATH=`xcode-select --print-path`

if [ -z "$XCODE_PATH" ]; then

    echo "Could not find XCode location (use xcode-select -switch to set the correct path)"

    exit 1

fi

prepare_environment() {

    ARCH=$1

    if test x$SDK_VERSION = x; then

      export SDK_VERSION=`xcodebuild -showsdks | grep iphoneos | sed "s|.*iphoneos||"`

      if [ -z "$XCODE_PATH" ]; then

          echo "Could not find a valid iOS SDK"

          exit 1

      fi  

    fi

    case $ARCH in

        armv6)

            DEV_PATH="$XCODE_PATH/Platforms/iPhoneOS.platform/Developer"

            SDK_PATH="$DEV_PATH/SDKs/iPhoneOS$SDK_VERSION.sdk"

            ;;

        armv7)

            DEV_PATH="$XCODE_PATH/Platforms/iPhoneOS.platform/Developer"

            SDK_PATH="$DEV_PATH/SDKs/iPhoneOS$SDK_VERSION.sdk"

            ;;

        i386)

            DEV_PATH="$XCODE_PATH/Platforms/iPhoneSimulator.platform/Developer"

            SDK_PATH="$DEV_PATH/SDKs/iPhoneSimulator$SDK_VERSION.sdk"

            ;;

        *)

            echo "Unknown Architecture $ARCH"

            exit 1

            ;;

    esac

    if [ ! -d "$SDK_PATH" ]; then

        echo "Could not find iOS SDK at $SDK_PATH"

        exit 1

    fi

    if test x$MIN_OS_VERSION = x; then

        export MIN_OS_VERSION="3.0"

    fi

    # Environment flags

    CFLAGS="-g -O2 -pipe -no-cpp-precomp -isysroot $SDK_PATH \

            -miphoneos-version-min=$MIN_OS_VERSION -I$SDK_PATH/usr/include/"

    LDFLAGS="-L$SDK_PATH/usr/lib/ -isysroot $SDK_PATH \

             -miphoneos-version-min=$MIN_OS_VERSION -static-libgcc"

    export CXXFLAGS="$CFLAGS"

    export CXXCPP="$DEV_PATH/usr/bin/llvm-cpp-4.2"

    export CPP="$CXXCPP"

    export CXX="$DEV_PATH/usr/bin/llvm-g++-4.2"

    export CC="$DEV_PATH/usr/bin/llvm-gcc-4.2"

    export LD="$DEV_PATH/usr/bin/ld"

    export AR="$DEV_PATH/usr/bin/ar"

    export AS="$DEV_PATH/usr/bin/ls"

    export NM="$DEV_PATH/usr/bin/nm"

    export RANLIB="$DEV_PATH/usr/bin/ranlib"

    export STRIP="$DEV_PATH/usr/bin/strip"

    # We dynamically load X11, so using the system X11 headers is fine.

    CONFIG_FLAGS="--disable-shared --enable-static"

    case $ARCH in

        armv6)

            export CONFIG_FLAGS="$CONFIG_FLAGS --host=armv6-apple-darwin"

            export CFLAGS="$CFLAGS -arch armv6"

            export LDFLAGS="$LDFLAGS -arch armv6"

            ;;

        armv7)

            export CONFIG_FLAGS="$CONFIG_FLAGS --host=armv7-apple-darwin"

            export CFLAGS="$CFLAGS -arch armv7"

            export LDFLAGS="$LDFLAGS -arch armv7"

            ;;

        i386)

            export CONFIG_FLAGS="$CONFIG_FLAGS --host=i386-apple-darwin"

            export CFLAGS="$CFLAGS -arch i386"

            export LDFLAGS="$LDFLAGS -arch i386"

            ;;

        *)

            echo "Unknown Architecture $ARCH"

            exit 1

            ;;

    esac

}

prepare_environment "armv6"

echo "Building with iOS SDK v$SDK_VERSION for iOS >= $MIN_OS_VERSION"

#

# Find the configure script

#

srcdir=`dirname $0`/..

srcdir=`cd $srcdir && pwd`

auxdir=$srcdir/build-scripts

cd $srcdir

#

# Figure out which phase to build:

# all,

# configure, configure-armv6, configure-armv7, configure-i386

# make, make-armv6, make-armv7, make-i386, merge

# clean

if test x"$1" = x; then

    phase=all

else

    phase="$1"

fi

case $phase in

    all)

        configure_armv6="yes"

        configure_armv7="yes"

        configure_i386="yes"

        make_armv6="yes"

        make_armv7="yes"

        make_i386="yes"

        merge="yes"

        ;;

    configure)

        configure_armv6="yes"

        configure_armv7="yes"

        configure_i386="yes"

        ;;

    configure-armv6)

        configure_armv6="yes"

        ;;

    configure-armv7)

        configure_armv7="yes"

        ;;

    configure-i386)

        configure_i386="yes"

        ;;

    make)

        make_armv6="yes"

        make_armv7="yes"

        make_i386="yes"

        merge="yes"

        ;;

    make-armv6)

        make_armv6="yes"

        ;;

    make-armv7)

        make_armv7="yes"

        ;;

    make-i386)

        make_i386="yes"

        ;;

    merge)

        merge="yes"

        ;;

    clean)

        clean_armv6="yes"

        clean_armv7="yes"

        clean_i386="yes"

        ;;

    clean-armv6)

        clean_armv6="yes"

        ;;

    clean-armv7)

        clean_armv7="yes"

        ;;

    clean-i386)

        clean_i386="yes"

        ;;

    *)

        echo "Usage: $0 [all|configure[-armv6|-armv7|-i386]|make[-armv6|-armv7|-i386]|merge|clean[-armv6|-armv7|-i386]]"

        exit 1

        ;;

esac

#

# Create the build directories

#

for dir in build build/armv6 build/armv7 build/i386; do

    if test -d $dir; then

        :

    else

        mkdir $dir || exit 1

    fi

done

#

# Build the armv6 binary

#

prepare_environment "armv6"

if test x$configure_armv6 = xyes; then

    (cd build/armv6 && \

     sh ../../configure $CONFIG_FLAGS CC="$CC" CXX="$CXX" CFLAGS="$CFLAGS" LDFLAGS="$LDFLAGS") || exit 2

     # configure is not yet fully ready for iOS, some manual patching is required

     cp include/* build/armv6/include

     cp include/SDL_config_iphoneos.h build/armv6/include/SDL_config.h || exit 2

     sed -i "" -e "s|^EXTRA_CFLAGS.*|EXTRA_CFLAGS=-I./include|g" build/armv6/Makefile || exit 2

     sed -i "" -e "s|^EXTRA_LDFLAGS.*|EXTRA_LDFLAGS=-lm|g" build/armv6/Makefile || exit 2

fi

if test x$make_armv6 = xyes; then

    (cd build/armv6 && make -j$NJOB) || exit 3

fi

#

# Build the armv7 binary

#

prepare_environment "armv7"

if test x$configure_armv7 = xyes; then

    (cd build/armv7 && \

     sh ../../configure $CONFIG_FLAGS CC="$CC" CXX="$CXX" CFLAGS="$CFLAGS" LDFLAGS="$LDFLAGS") || exit 2

     # configure is not yet fully ready for iOS, some manual patching is required

     cp include/* build/armv7/include

     cp include/SDL_config_iphoneos.h build/armv7/include/SDL_config.h || exit 2

     sed -i "" -e "s|^EXTRA_CFLAGS.*|EXTRA_CFLAGS=-I./include|g" build/armv7/Makefile || exit 2

     sed -i "" -e "s|^EXTRA_LDFLAGS.*|EXTRA_LDFLAGS=-lm|g" build/armv7/Makefile || exit 2

fi

if test x$make_armv7 = xyes; then

    (cd build/armv7 && make -j$NJOB) || exit 3

fi

#

# Build the i386 binary

#

prepare_environment "i386"

if test x$configure_i386 = xyes; then

    (cd build/i386 && \

     sh ../../configure $CONFIG_FLAGS CC="$CC" CXX="$CXX" CFLAGS="$CFLAGS" LDFLAGS="$LDFLAGS") || exit 2

     # configure is not yet fully ready for iOS, some manual patching is required

     cp include/* build/i386/include

     cp include/SDL_config_iphoneos.h build/i386/include/SDL_config.h || exit 2

     sed -i "" -e "s|^EXTRA_CFLAGS.*|EXTRA_CFLAGS=-I./include|g" build/i386/Makefile || exit 2

     sed -i "" -e "s|^EXTRA_LDFLAGS.*|EXTRA_LDFLAGS=-lm|g" build/i386/Makefile || exit 2

fi

if test x$make_i386 = xyes; then

    (cd build/i386 && make -j$NJOB) || exit 3

fi

#

# Combine into fat binary

#

if test x$merge = xyes; then

    output=ios/lib

    sh $auxdir/mkinstalldirs build/$output

    cd build

    target=`find . -mindepth 4 -maxdepth 4 -type f -name '*.dylib' | head -1 | sed 's|.*/||'`

    (lipo -create -o $output/libSDL2.a armv6/build/.libs/libSDL2.a armv7/build/.libs/libSDL2.a i386/build/.libs/libSDL2.a &&

     lipo -create -o $output/libSDL2main.a armv6/build/libSDL2main.a armv7/build/libSDL2main.a i386/build/libSDL2main.a &&

     cp -r armv6/include ios

     echo "Build complete!" &&

     echo "Files can be found under the build/ios directory.") || exit 4

    cd ..

fi

#

# Clean up

#

do_clean()

{

    echo $*

    $* || exit 6

}

if test x$clean_armv6 = xyes; then

    do_clean rm -r build/armv6

fi

if test x$clean_armv7 = xyes; then

    do_clean rm -r build/armv7

fi

if test x$clean_i386 = xyes; then

    do_clean rm -r build/i386

fi