[Lazarus] Troll Tech and Inprise/Borland Collaborate on LinuxGUI

[Florian Klaempfl]

Curtis White wrote:
> 
> I am a little confused about this issue. Unless we are compiling and
> linking to the C++ source code, why it is necessary to support C++?
> Couldn't the QT header files just be converted to Pascal the same way the
> GTK header files were?  Once the code is compiled, it just makes calls to
> the binary objects at the binary level, right?  Or not?  And Pascal
> already supports most of the same things as C++ except multiple
> inheritance and maybe a couple of others. So I would think that the
> header files could be converted without too much trouble. There might be
> a few challenges to work through (like multiple inheritance), but I would
> think it wouldn't be all that hard.
> 
> Unless I am wrong about how all this stuff works at a lower level, I
> don't see any reason that the compiler should need to support C++. Can
> someone explain to me what I am missing here?

A lot, the low level stuff works completly different:
- Qt uses C++ classes but the FPC class modell isn't compatible with that
  one used by egcs (and that one used by egcs isn't compatible with
  that of gcc :()
- MI requires a lot of changes (syntactical and semantical)
- C++ uses a complete different exception handling model

> 
> How hard would it be to add that support to the compiler if it is needed?
> 

It IS hard but I'am working on it :)