[Pythonmac-SIG] Loading modules on MacOS
Ronald Oussoren
ronaldoussoren at mac.com
Sun Oct 30 15:29:39 CET 2005
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
>
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