isEmpty(QT_ARCH) {
    # The iPhoneOS and iPhoneSimulator targets share the same toolchain,
    # so when configure runs the arch tests it passes the correct sysroot,
    # but we fail to pick up the architecture since we're not passing -arch
    # yet. Xcode does not seem to have a way to run the shared toolchain
    # in a way that will automatically  do this (for example xcrun -sdk).
    contains(QMAKE_MAC_SDK, iphoneos.*): QT_ARCH = armv7
    else: QT_ARCH = i386 # Simulator
} else {
    # Fix up the QT_ARCH to be more specific
    equals(QT_ARCH, arm) {
        # Samsung S5PC100, Apple A4, A5, A5X
        QT_ARCH = armv7

        # FIXME: How do we support armv7s when Qt can't do universal builds?
    }
}

!equals(MAKEFILE_GENERATOR, XCODE) {
    arch_flag = -arch $$QT_ARCH
    QMAKE_CFLAGS           += $$arch_flag
    QMAKE_CXXFLAGS         += $$arch_flag
    QMAKE_OBJECTIVE_CFLAGS += $$arch_flag
    QMAKE_LFLAGS           += $$arch_flag
}