[Pythonmac-SIG] Loading modules on MacOS

[Ronald Oussoren]

On 30-okt-2005, at 8:06, jurem at flextronics.si wrote:

> Hi all,
> I'm porting some software from Linux/Python to MacOS/Python. Core  
> modules
> are written in C++ and are loaded in Python as modules.
>
> On Linux those core modules are linked as shared libraries (.so).  
> It looks
> something like:
>
> core_module1.so <-- 'standalone' core module, does not link any  
> other lib
> high_module2.so <-- higher level module which is using core_module1.so
>
> Problem on MacOS is, that Python modules are bundles not shared  
> libraries,
> so I've made it like:
>
> core_module1.dylib <-- dynamic library (using -dynamiclib gcc option)
> core_module1.so    <-- bundle, created from .dylib
> high_module2.so    <-- bundle, which also links .dylib
>
> I'm symlinking core_module1.dylib to libcore_module1.dylib.
> Link options for both bundles are:
> -W1,-F. -bundle -framework Python -lstdc++ -L. -lcore_module1

Why not build libcore_module1.dylib as one would normally do (and I  
haven't done that yet, so can't help you there, -dynamiclib seems to  
be the right way). Then use distutils to build the extensions, that  
way the exentions get build how they should be.

>
> If I create only core_module1.so (as bundle, without dynamic  
> library) it
> loads properly, but if I do it this way Python 'hangs' when I try  
> to load
> module. I'm using dlcompat library (Mach-O wrapper) for loading  
> dynamic
> library (dlopen, dlysm, ...) and it should work fine.

What do you mean by 'hangs'? I suppose your script stops executing  
when it hits the import statement, but the quotes make me curious.

Ronald

>
> Python version is 2.3, GCC is 3.3 (if I try to compile it on Linux  
> with
> same versions works without problems)
>
> Does anyone have any idea, what could be wrong? I think this would  
> be the
> cleanest way to port this software, am I wrong?
>
> Thanks for any ideas/suggestions,
>
> regards, Jure
>
> _______________________________________________
> Pythonmac-SIG maillist  -  Pythonmac-SIG at python.org
> http://mail.python.org/mailman/listinfo/pythonmac-sig
>