[PyQt] Dynamic loading and pyqtdeplot and iOS

[Robert Kent]

Linking against my libpython3.4.a gets me a step further and a more 
exciting error!

Fatal Python error: PyThreadState_Get: no current thread
Process 500 stopped
* thread #1: tid = 0x11bcb, 0x24e04c84 
libsystem_kernel.dylib`__pthread_kill + 8, queue = 
'com.apple.main-thread', stop reason = signal SIGABRT
     frame #0: 0x24e04c84 libsystem_kernel.dylib`__pthread_kill + 8
libsystem_kernel.dylib`__pthread_kill:
->  0x24e04c84 <+8>:  blo 0x24e04c9c                ; <+32>
     0x24e04c88 <+12>: ldr    r12, [pc, #0x4]           ; <+24>
     0x24e04c8c <+16>: ldr    r12, [pc, r12]
     0x24e04c90 <+20>: b 0x24e04c98                ; <+28>

Any thoughts on this one Phil?! It doesnt actually kill the application, 
it just hangs at the launch screen!

Cheers, Rob

On 04/05/2016 17:17, Robert Kent wrote:
> 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
>>     _______________________________________________
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>>     <mailto:PyQt at riverbankcomputing.com>
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>>
>>
>
>
>
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