Initialize all targets. Necessary before targets can be looked up
    via the :class:`Target` class.

def initialize_all_targets():
    """
    Initialize all targets. Necessary before targets can be looked up
    via the :class:`Target` class.
    """
    ffi.lib.LLVMPY_InitializeAllTargetInfos()
    ffi.lib.LLVMPY_InitializeAllTargets()
    ffi.lib.LLVMPY_InitializeAllTargetMCs()