[Qgis-user] Mac OS X: QGIS 1.0 Preview 2 Crashes

[William Kyngesburye]

On Nov 14, 2008, at 5:03 PM, Martin Dobias wrote:

>> So now the question is (and something I've wondered about) - just  
>> how does
>> this python support work?  Does it execute the python program (as  
>> found in
>> the user's PATH)?  Does it depend on linking to the python library  
>> to find
>> some python start/init symbol?
>
> We're using only direct API function calls to python C library, python
> executable is _not_ being run.
>
> To get libqgispython working properly, it's loaded from QGIS
> application with following Qt's load hints:

Ugh.  So, libqgispython is loaded more like a library, and it expects  
the python library to be loaded somehow - by the compiler linking -  
which is what we need to avoid.

I wonder if Qgis can load the python library in the same way it loads  
libqgispython, so that the python symbols are available to  
libqgispython when it's loaded?  Then it could load whichever python  
is "default", whatever that may mean, or have a Qgis preference (like  
setting the GRASS location) to let the user choose a Python to use.

Otherwise, whatever is done to make all the PyQt and Qgis python  
extensions "proper" won't matter, since libqgispython will be stuck  
with whichever python it was compiled with.

-----
William Kyngesburye <kyngchaos*at*kyngchaos*dot*com>
http://www.kyngchaos.com/

"This is a question about the past, is it? ... How can I tell that the  
past isn't a fiction designed to account for the discrepancy between  
my immediate physical sensations and my state of mind?"

- The Ruler of the Universe