Re: PyCXX problem (update)

[Barry S. <ba...@ba...>]

On Mar 15, 2007, at 13:41, Gregor Mirai wrote:

> Hello,

There is a PyCXX mailing list that we can use for this. I've CC'ed to  
get
this useful info onto the list.

>
> I have traced the problem down to the GCC compiler.
>
> For instance using more than one shared object file from python  
> works ok when
> they are compiled on Solaris machine.
>
> The cause of the problem (when compiling with GCC) are multiple  
> exception
> typeinfos that have different addresses which does not match well  
> when python
> tries to catch exceptions. In effect python doesn't catch them and the
> program terminates.
>
> It seems this is a well known bug, that will be fixed in upcoming  
> version 4.2.
> of GCC compiler.
>
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19664

That's nasty.

>
> I am not sure if there is any workaround for this issue. The  
> intermediate
> solution would be to catch all exceptions in python extension  
> libraries and
> return some sort of exception info to the caller.

THe code does catch all exceptions and return to python. I guess that  
the compiler
bug is preventing C++ exceptions from working. And that means that  
the translation
from C++ to Python exceptions is broken.

Barry