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List:       kde-bugs-dist
Subject:    Bug#5814: KDE 2.0: kio doesn't compile on Tru64 UNIX
From:       Michael Matz <matzmich () cs ! tu-berlin ! de>
Date:       2000-07-01 3:36:24
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Hi,

On Fri, 30 Jun 2000, Rigoberto Corujo wrote:
> When I try to compile "kdelibs-1.91/kio" on Tru64 UNIX V5.0 I get the

Ahh, nice to see a DEC (ar compaq) guy, may be, we can resolve the issues
with cxx and shared libs :)

> following error message.
> 
> cxx: Error: kservicefactory.h, line 85: return type is not identical to
>           return type "KSycocaEntry *" of overridden virtual function
> function
>           "KSycocaFactory::createEntry(int)"
>   virtual KService * createEntry(int offset);

Your compiler doesn't understand covariant returns.

> I don't believe this is legal in C++.  I also tried a similar test
> using "g++" and got the same error.  I don't know how this would ever
> compile under any compiler.

It is legal C++. But covariant returns were not in some older definitions
of C++. I wonder, what version of g++ you tried, because egcs 1.1.2 and
gcc 2.95.2 accepts the above (and also produce working code out of it ;)

Hmm, I can't believe, that cxx does not understand covariant returns.


Ciao,
Michael.

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