How to make a fat library for MonoTouch in XCode

1.  New Project in XCode ( i have version 4.3.3 )
2. In Architectures from project options set the fallowing: $(ARCHS_STANDARD_32_BIT) armv6
3. on the valid architectures set "armv6 armv7 i386" values
4. on the Build Phases tab, add the Run Script code:
   

   # Version 2.0 (updated for Xcode 4, with some fixes)
   # Changes:
   #    - Works with xcode 4, even when running xcode 3 projects (Workarounds for apple bugs)
   #    - Faster / better: only runs lipo once, instead of once per recursion
   #    - Added some debugging statemetns that can be switched on/off by changing the DEBUG_THIS_SCRIPT variable to "true"
   #    - Fixed some typos
   #
   # Purpose:
   #   Create a static library for iPhone from within XCode
   #   Because Apple staff DELIBERATELY broke Xcode to make this impossible from the GUI (Xcode 3.2.3 specifically states this in the Release notes!)
   #   ...no, I don't understand why they did this!
   #
   # Author: Adam Martin - http://twitter.com/redglassesapps
   # Based on: original script from Eonil (main changes: Eonil's script WILL NOT WORK in Xcode GUI - it WILL CRASH YOUR COMPUTER)
   #
   # More info: see this Stack Overflow question: http://stackoverflow.com/questions/3520977/build-fat-static-library-device-simulator-using-xcode-and-sdk-4
   
   #################[ Tests: helps workaround any future bugs in Xcode ]########
   #
   DEBUG_THIS_SCRIPT="false"
   
   if [ $DEBUG_THIS_SCRIPT = "true" ]
   then
   echo "########### TESTS #############"
   echo "Use the following variables when debugging this script; note that they may change on recursions"
   echo "BUILD_DIR = $BUILD_DIR"
   echo "BUILD_ROOT = $BUILD_ROOT"
   echo "CONFIGURATION_BUILD_DIR = $CONFIGURATION_BUILD_DIR"
   echo "BUILT_PRODUCTS_DIR = $BUILT_PRODUCTS_DIR"
   echo "CONFIGURATION_TEMP_DIR = $CONFIGURATION_TEMP_DIR"
   echo "TARGET_BUILD_DIR = $TARGET_BUILD_DIR"
   fi
   
   #####################[ part 1 ]##################
   # First, work out the BASESDK version number (NB: Apple ought to report this, but they hide it)
   #    (incidental: searching for substrings in sh is a nightmare! Sob)
   
   SDK_VERSION=$(echo ${SDK_NAME} | grep -o '.\{3\}$')
   
   # Next, work out if we're in SIM or DEVICE
   
   if [ ${PLATFORM_NAME} = "iphonesimulator" ]
   then
   OTHER_SDK_TO_BUILD=iphoneos${SDK_VERSION}
   else
   OTHER_SDK_TO_BUILD=iphonesimulator${SDK_VERSION}
   fi
   
   echo "XCode has selected SDK: ${PLATFORM_NAME} with version: ${SDK_VERSION} (although back-targetting: ${IPHONEOS_DEPLOYMENT_TARGET})"
   echo "...therefore, OTHER_SDK_TO_BUILD = ${OTHER_SDK_TO_BUILD}"
   #
   #####################[ end of part 1 ]##################
   
   #####################[ part 2 ]##################
   #
   # IF this is the original invocation, invoke WHATEVER other builds are required
   #
   # Xcode is already building ONE target...
   #
   # ...but this is a LIBRARY, so Apple is wrong to set it to build just one.
   # ...we need to build ALL targets
   # ...we MUST NOT re-build the target that is ALREADY being built: Xcode WILL CRASH YOUR COMPUTER if you try this (infinite recursion!)
   #
   #
   # So: build ONLY the missing platforms/configurations.
   
   if [ "true" == ${ALREADYINVOKED:-false} ]
   then
   echo "RECURSION: I am NOT the root invocation, so I'm NOT going to recurse"
   else
   # CRITICAL:
   # Prevent infinite recursion (Xcode sucks)
   export ALREADYINVOKED="true"
   
   echo "RECURSION: I am the root ... recursing all missing build targets NOW..."
   echo "RECURSION: ...about to invoke: xcodebuild -configuration \"${CONFIGURATION}\" -target \"${TARGET_NAME}\" -sdk \"${OTHER_SDK_TO_BUILD}\" ${ACTION} RUN_CLANG_STATIC_ANALYZER=NO"
   xcodebuild -configuration "${CONFIGURATION}" -target "${TARGET_NAME}" -sdk "${OTHER_SDK_TO_BUILD}" ${ACTION} RUN_CLANG_STATIC_ANALYZER=NO BUILD_DIR="${BUILD_DIR}" BUILD_ROOT="${BUILD_ROOT}"
   
   ACTION="build"
   
   #Merge all platform binaries as a fat binary for each configurations.
   
   # Calculate where the (multiple) built files are coming from:
   CURRENTCONFIG_DEVICE_DIR=${SYMROOT}/${CONFIGURATION}-iphoneos
   CURRENTCONFIG_SIMULATOR_DIR=${SYMROOT}/${CONFIGURATION}-iphonesimulator
   
   echo "Taking device build from: ${CURRENTCONFIG_DEVICE_DIR}"
   echo "Taking simulator build from: ${CURRENTCONFIG_SIMULATOR_DIR}"
   
   CREATING_UNIVERSAL_DIR=${SYMROOT}/${CONFIGURATION}-universal
   echo "...I will output a universal build to: ${CREATING_UNIVERSAL_DIR}"
   
   # ... remove the products of previous runs of this script
   #      NB: this directory is ONLY created by this script - it should be safe to delete!
   
   rm -rf "${CREATING_UNIVERSAL_DIR}"
   mkdir "${CREATING_UNIVERSAL_DIR}"
   
   #
   echo "lipo: for current configuration (${CONFIGURATION}) creating output file: ${CREATING_UNIVERSAL_DIR}/${EXECUTABLE_NAME}"
   lipo -create -output "${CREATING_UNIVERSAL_DIR}/${EXECUTABLE_NAME}" "${CURRENTCONFIG_DEVICE_DIR}/${EXECUTABLE_NAME}" "${CURRENTCONFIG_SIMULATOR_DIR}/${EXECUTABLE_NAME}"
   
   #########
   #
   # Added: StackOverflow suggestion to also copy "include" files
   #    (untested, but should work OK)
   #
   if [ -d "${CURRENTCONFIG_DEVICE_DIR}/usr/local/include" ]
   then
   mkdir -p "${CREATING_UNIVERSAL_DIR}/usr/local/include"
   # * needs to be outside the double quotes?
   cp "${CURRENTCONFIG_DEVICE_DIR}/usr/local/include/"* "${CREATING_UNIVERSAL_DIR}/usr/local/include"
   fi
   fi
   
   

   5. Generate for IPhone Simulator 

   6. Use the a file generated in ../Debug-Universal.