[Portland] Project Portland, RuDI and the Generic desktop adapter

[nf2]

nf2 wrote:

> Lars Knoll wrote:
>
>>
>> The other problem is interoperability between different major 
>> versions of the same library (Qt3 vs Qt4, Gtk2 vs a future Gtk3). 
>> These usually define similar sets of symbols which could lead to 
>> larger problems when loading them into the same address space.
>>
>>  
>>
> Good point. But is this really true?
>
> Let's say application A links to two libraries (lib1 and lib2 which in 
> the background link to Qt3 and Qt4).
>
> A->lib1->Qt3
> A->lib2->Qt4
>
> I would think that the symbols would never conflict unless A includes 
> the header files from Qt3 and Qt4 at the same time and links them 
> directly.
>
> But i just don't know...
>
> I think that's very interesting, also for other projects like cross 
> desktop components...
>

Just tried it with a little test-case. I think you are right. Bad news 
for an in-process approach. :-(

Btw.: What about symbol versioning? Would it help here?

Norbert