build google protobuf iOS version

ios-library.sh

export SDKVER="6.1"

configure_for_platform() {
    export PLATFORM=$1
    export ARCHITECTURE=$2
    echo "Platform is $PLATFORM"

    if [ "$PLATFORM" == "iPhoneSimulator" ]; then
	export ARCH=i686-apple-darwin10
    fi

    if [ "$PLATFORM" == "iPhoneOS" ]; then
	export ARCH=arm-apple-darwin10
    fi

    export DEVROOT=/Applications/Xcode.app/Contents/Developer/Platforms/$PLATFORM.platform/Developer
    export SDKROOT="$DEVROOT/SDKs/$PLATFORM$SDKVER.sdk"
    export PKG_CONFIG_PATH="$SDKROOT/usr/lib/pkgconfig:$DEVROOT/usr/lib/pkgconfig"
    export AS="xcrun as"
    export ASCPP="xcrun as"
    export AR="xcrun ar"
    export RANLIB="xcrun ranlib"
    export CC="xcrun gcc"
    export CXX="xcrun g++"
    export LD="xcrun ld"
    export STRIP="xcrun strip"
    export LIBRARY_PATH="$SDKROOT/usr/lib"

    export CPPFLAGS=""
    export CFLAGS="-arch $ARCHITECTURE -fmessage-length=0 -pipe -fpascal-strings -miphoneos-version-min=4.0 -isysroot=$SDKROOT -I$SDKROOT/usr/include -I$SDKROOT/usr/include/c++/4.2.1/"
    export CXXFLAGS="$CFLAGS"
    export LDFLAGS="-arch $ARCHITECTURE -isysroot='$SDKROOT' -L$SDKROOT/usr/lib/system -L$SDKROOT/usr/lib/"

    ./configure --host=$ARCH --with-protoc=protoc --enable-static --disable-shared
}

build_target() {
    PLATFORM=$1
    ARCHITECTURE=$2
    SRC_LIB=src/.libs/libprotobuf-lite.a
    SRC_LIB_ARCH=ios-build/libprotobuf-lite-$ARCHITECTURE.a

    if [ -f $SRC_LIB_ARCH ]; then
        return
    fi

    configure_for_platform $PLATFORM $ARCHITECTURE
    make clean
    make
    cp $SRC_LIB $SRC_LIB_ARCH
}

if [ -z 'which xcrun' ]; then
    echo "error: can't find xcrun, must install Xcode Command line tools"
    exit 1
fi

# check 'configure' is existed, if no 'configure' need to run 'autogen.sh'
if [ ! -f ./configure ]; then
    ./autogen.sh
fi

if [ ! -d ios-build ]; then
    mkdir ios-build
fi

# build for iPhoneSimulator
build_target iPhoneSimulator i386

# build for iPhoneOS armv7
build_target iPhoneOS armv7

# build for iPhoneOS armv7s
build_target iPhoneOS armv7s

#crate a fat library containing all achitectures in libprotobuf.a
xcrun -sdk iphoneos lipo \
    -arch armv7 ios-build/libprotobuf-lite-armv7.a \
    -arch armv7s ios-build/libprotobuf-lite-armv7s.a \
    -arch i386 ios-build/libprotobuf-lite-i386.a \
    -create -output ios-build/libprotobuf.a