[PyQt] Problem catching exception from SIP-wrapped function

[Phil Thompson]

On Tue, 22 Sep 2009 20:28:09 +0200, Arve Knudsen <arve.knudsen at gmail.com>
wrote:
> On Tue, Sep 22, 2009 at 7:27 PM, Phil Thompson
> <phil at riverbankcomputing.com>wrote:
> 
>> On Tue, 22 Sep 2009 19:17:12 +0200, Arve Knudsen
<arve.knudsen at gmail.com>
>> wrote:
>> > On Tue, Sep 22, 2009 at 6:28 PM, Phil Thompson
>> > <phil at riverbankcomputing.com>wrote:
>> >
>> >> On Mon, 21 Sep 2009 18:40:35 +0200, Arve Knudsen
>> <arve.knudsen at gmail.com>
>> >> wrote:
>> >> > Hi
>> >> >
>> >> > I have run into this problem where a C++ exception is not correctly
>> >> > translated into Python on Linux (it works under VC++ on Windows).
>> >> > The
>> >> > exception is apparently not caught as it should, but looking at the
>> >> > SIP-generated sourcecode I cannot see why (there is a try/catch
>> >> > block
>> >> > for
>> >> > the exception). Any ideas as to what might be going wrong here? I
>> >> > have
>> >> > tried
>> >> > std::exception instead of my custom exception, and this gets
>> translated
>> >> > correctly to Python.
>> >> >
>> >> > Attached I have a simple library 'raiser', which is wrapped by the
>> >> > Python
>> >> > module 'raiser'. In order to build it, first build a shared library
>> >> > from
>> >> > 'raiser.cpp', then run 'configure.py' and make.
>> >>
>> >> Works fine for me on Linux with the current SIP snapshot. I did
change
>> >> your
>> >> code first to make everything in-line so it wasn't necessary to build
>> >> a
>> >> separate library.
>> >
>> >
>> > By inlining you remove the problem of interest, which is to propagate
>> > an
>> > exception from one library to another. It also works for me when
>> inlining,
>> > so try my original version please.
>>
>> That implies it's a build system issue. Can you send me the Makefile you
>> are using to build the library so that I know I'm exactly reproducing
>> what
>>  you are doing.
> 
> 
> For this particular case, you can do the simplest thing possible: g++
> -shared -o libraiser.so raiser.cpp.

And add -fPIC presumably.

You need to add "export_all=True" when creating the Makefile in your
configure.py.

Phil