Endian trouble loading Typelib with gi.repository import

[Matt <mwtaylor gmail com>]

Hi,

I'm having some issues with using pygobject on a big-endian architecture 
(mips router), for example:

>>> from gi.repository import GLib
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<frozen importlib._bootstrap>", line 2237, in _find_and_load
  File "<frozen importlib._bootstrap>", line 2226, in 
_find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 1191, in _load_unlocked
  File "<frozen importlib._bootstrap>", line 1161, in 
_load_backward_compatible
  File "/usr/lib/python3.4/site-packages/gi/importer.py", line 67, in 
load_module
    dynamic_module._load()
  File "/usr/lib/python3.4/site-packages/gi/module.py", line 294, in _load
    self._introspection_module = get_introspection_module(self._namespace)
  File "/usr/lib/python3.4/site-packages/gi/module.py", line 273, in 
get_introspection_module
    module = IntrospectionModule(namespace, version)
  File "/usr/lib/python3.4/site-packages/gi/module.py", line 122, in 
__init__
    repository.require(namespace, version)
gi.RepositoryError: Failed to load typelib file 
'/usr/lib/girepository-1.0/GLib-2.0.typelib' for namespace 'GLib': 
Typelib size 1957626368 does not match 175988

This is clearly something related to the endianness when checking the 
typelib size: struct.unpack('<I', struct.pack('>I', 1957626368))  ==  
(175988,)
175988 is the correct filesize.

Can anyone help me out with what the issue might be here? (I'm using 
pygobject version 3.14.0, gobject-introspection 1.42.0, glib2 2.43.4, 
all cross-compiled for the architecture).

Many thanks,
Matt