[Python-Dev] next vs darwin

Jack Jansen jack@oratrix.com
Fri, 1 Feb 2002 15:52:11 +0100

On Friday, February 1, 2002, at 12:09 , Martin v. Loewis wrote:

> Jack Jansen <Jack.Jansen@oratrix.nl> writes:
>> With the define on it loads all extension modules into the application
>> namespace. Some people want this (despite the problems sketched above)
>> because they have modules that refer to external symbols defined in
>> modules that have been loaded earlier (and I assume there's magic that
>> ensures their modules are loaded in the right order).
> On Unix, this is a runtime option via sys.setdlopenflags (RTLD_GLOBAL
> turns on import into application namespace). Do you think you could
> emulate this API?

Shouldn't be a problem. I had never heard of sys.setdlopenflags(), 
otherwise I would have done so already.
>> I prefer the new (OSX 10.1) preferred Apple way of linking plugins
>> (which is also the common way to do so on all other non-unix
>> platforms) where the plugin has to be linked against the application
>> and dynamic libraries it is going to be plugged into, so none of
>> this dynamic behaviour goes on.
> I'm not sure linking with a libpython.so is desirable, I'm quite fond
> of the approach to let the executable export symbols to the
> extensions. If that is possible on OS X, I'd encourage you to follow
> such a strategy (in unix gcc/ld, this is enabled through
> -Wl,--export-dynamic).

Indeed, you link against the embedder (be it .so, framework or 
application) in a special way that say "this is going to be the host 
- Jack Jansen        <Jack.Jansen@oratrix.com>        
http://www.cwi.nl/~jack -
- If I can't dance I don't want to be part of your revolution -- Emma 
Goldman -