[Python-Dev] next vs darwin (original) (raw)

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 (RTLDGLOBAL 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 application".