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[Python-Dev] debug and release python

[Python-Dev] debug and release pythonKristján Valur Jónsson kristjan at ccpgames.com
Tue Jun 15 14:48:39 CEST 2010
What I mean is that a third party software vendor supplies a foobarapp.pyd and a foobarapp_d.pyd dlls that link to python2x.dll and python2x_d.dll respectively.  But the latter will have been compiled to match a certain settings of the objimpl.h header, which may not match whatever is being used to build the local python2x_d.dll.  And thus, you get strange and hard to debug linker errors when trying to load external libraries.

When developing superapp.exe, which uses a custom build of python2x, perhaps even embedded, python2x_d.dll is used extensively both during the development process and the testing process.  This is why foobarapp_d.pyd is necessary and why it is supplied by any sensible vendor providing opaque python extensions.  But the current objimpl.h api makes it a matter of developer choice whether that foobarapp_d.pyd will successfully link with your python2x_d.dll or not.

IMHO, it is not good practice to expose an API that changes depending on preprocessor settings like this.

K

> -----Original Message-----
> From: "Martin v. Löwis" [mailto:martin at v.loewis.de]
> Sent: 14. júní 2010 22:13
> To: Kristján Valur Jónsson
> Cc: python-dev at python.org
> Subject: Re: [Python-Dev] debug and release python
> 
> > Some external software comes with proprietary .pyd bindings.
> 
> Can you please explain what a "proprietary .pyd binding" is?
> 
> Do you mean they come with extension modules? If so, there is no chance
> of using them in debug mode, anyway, right? So what specifically is the
> problem?
> 
> Regards,
> Martin

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