* Nils Holland  [Lundi 18 Juin 2001 02:24 pm ]  :

  > On Monday 18 June 2001 19:56, Mathieu Chouinard wrote:
  > > Hi,
  > > Does anybody have compiled KDE 2.2alpha2 with GCC 3.0?
  > > Mathieu
  >
  > No, but as far as I am informed, GCC 3 is not able to properly compil=
e
  > "real world code" like KDE at the moment. I wonder if the GCC 3 versi=
on
  > that will eventually be released will be able to do this. Originally,=
 the
  > GCC folks wanted to get 3.0 out of the door in the first half of this
  > year, but from what I have heard from various people (and from what I
  > have read on their website in their release-criteria), I think they'r=
e
  > not quite there yet...
gcc 3.0 and especially g++ 3.0 is much better than 2.95 regarding the sta=
ndards
however there will be some problems porting existing apps to 3.0
I especially forsee one problem
the c++ style headers vs c style header
in 2.95 you could use both without problems because it was not following =
the standards
now you have to be careful

if you have to choose one style and both using both
if you want to use the c++ style
#include <iostream> // for example
then you will have to use the namespace std::
otherwise this code won't compile
cout << "Hello World!" << endl;
the correct version  is=20
std::cout << "Hello World!" << std::endl;

Ok it is more verbose however namespace are a powerful, while simple conc=
ept, which allows you=20
to write libraries and codes without thinking about naming conflicts


now if you use the c style header
#include <iostream.h>
you can have both  notations[with std:: and without std::]
but it means that you can mix up styles which is not good in general

I tend to prefer the c++ style for correctness and consistency. there is =
no excuse for=20
lazy code.

moreover G++ 3.0 has a new inliner which operates at a earlier stage whic=
h will allow
better optimization for inline functions. I know some c++ techniques that=
 could really benefit
from such a change, however I am not sure that it will improve tremendous=
ly a GUI.

regards
C.
--=20
| Christophe Prud'homme, http://augustine.mit.edu/~prudhomm
| ICQ UIN: 24560867 Alias: Jesunix
|
| Travailler dur n'a jamais tu=E9 personne, mais pourquoi prendre le risq=
ue ?
| -- Edgar Bergen
 
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