[PyQt] Dynamic loading and pyqtdeplot and iOS

[Robert Kent]

Hi David,

Great minds think alike, I just actually took a step further by 
codesigning the module! Now I get a new error!

File ":/imp.py", line 243, in load_module
ImportError: 
dlopen(/var/mobile/Containers/Bundle/Application/E6DF5582-0426-4D83-815B-4862ABDACCB9/SpruceApp.app/numpy.core.multiarray.so, 
2): Symbol not found: _PyBool_Type
15B-4862ABDACCB9/SpruceApp.app/numpy.core.multiarray.so
   Expected in: flat namespace
  in 
/var/mobile/Containers/Bundle/Application/E6DF5582-0426-4D83-815B-4862ABDACCB9/SpruceApp.app/numpy.core.multiarray.so
Process 492 exited with status = 1 (0x00000001)

This looks like I failed to link something...

Anyway, I tried the static method and failed miserably, as in I managed 
to compile NumPy and make a libnumpy.a which I then linked against the 
application (via the LIBS variable in the .pro file), but python 
couldn't find (or didin't try to load/know about) the module. I would 
really appreciate a write up of this as I think this may very well be 
the answer for me too, thank you.

I'm doing this with NumPy 1.9.3 as well, also manually patched.

Thanks you very much indeed,

Rob

On 04/05/2016 17:11, David Morris wrote:
> Rob,
>
> While iOS does support dynamic modules as of version 8, that support 
> is extremely limited compared to most platforms.  I have not 
> experimented with it yet, however my understanding that dynamic 
> modules must be compiled as a framework (not just a shared library) 
> and must be properly signed, just like an app.
>
> For myself, I just compile NumPy as a static library compiled directly 
> into the executable.  I can write up a description of how I did this 
> if you are interested ....
>
> Out of curiosity, are you using the latest version of NumPy? (1.11)  
> What did it take to get it compiled for iOS?  I am running version 
> 1.9.3, but had to patch a few files.  I haven't looked into more 
> recent versions yet, but suspect patching is necessary still ... ?
>
> David
>
> On Wed, May 4, 2016 at 10:56 PM, Robert Kent <rob at gulon.co.uk 
> <mailto:rob at gulon.co.uk>> wrote:
>
>     So, here I go again!
>
>     Having successfully built my app and NumPy and (bits of) SciPy for
>     Android, I am now trying it on iOS... And having my usual struggle
>     with understanding how to build/load extension modules. I have
>     managed to compile NumPy for iOS and have the necessary .so files.
>     I add them to the bundle and then run the app and I get the
>     following traceback:
>
>     File ":/imp.py", line 243, in load_module
>     ImportError:
>     dlopen(/var/mobile/Containers/Bundle/Application/9AA43814-71DA-4544-993B-B783D83CB5B1/TestApp.app/numpy.core.multiarray.so
>     <http://numpy.core.multiarray.so>, 2): no suitable image found. 
>     Did find:
>     5B1/TestApp.app/numpy.core.multiarray.so
>     <http://numpy.core.multiarray.so>: mmap() error 1 at
>     address=0x0471E000, size=0x000DC000 segment=__TEXT in
>     Segment::map() mapping
>     /var/mobile/Containers/Bundle/Application/9AA43814-71DA-4544-993B-B783D83CB5B1/TestApp.
>     Process 475 exited with status = 1 (0x00000001)
>
>     I have no idea what this is telling me! It obviously finds image,
>     tries to load it and fails.
>
>     Has anyone had any success is building and loading extension
>     modules with pyqtdeploy for iOS or any ideas on where to go from
>     here. I'm guessing I've compiled something incorrectly but I have
>     no idea what/how.
>
>     All help gratefully received,
>
>     Rob
>     _______________________________________________
>     PyQt mailing list PyQt at riverbankcomputing.com
>     <mailto:PyQt at riverbankcomputing.com>
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>

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