[Qt-interest] duplicate symbol

["Alexander Carôt"]

Thanks to Paul and Tiago !

allright, I will think it over and see where the actual problem is. In fact my app has become pretty complex over the years so that it might take a while. Once it is fixed or further questions come up I will get back.

Thanks again,
best

-- A l e x


-------- Original-Nachricht --------
> Datum: Fri, 1 Oct 2010 10:35:42 +0200 (CEST)
> Von: paulf at free.fr
> An: qt-interest at trolltech.com
> Betreff: Re: [Qt-interest] duplicate symbol

> Hi
> 
> More precisely, it is defined in more than one compilation unit. Normally,
> a compilation unit is the .cpp file plus all of the headers that it
> includes. So in addition to the possibility that the symbol is multiply defined
> in .cpp files, it could also be defined just once in a header that is itself
> included in more than one .cpp file. The result is that the symbol is
> multiply defined in more than one compilation unit.
> 
> Golden rule:
> headers -> declarations
> .cpp    -> definitions
> 
> (with exceptions for inline functions (use sparingly) and templates)
> 
> A+
> Paul
> 
> 
> ----- Original Message -----
> From: "Thiago Macieira" <thiago at kde.org>
> To: qt-interest at trolltech.com
> Sent: Friday, 1 October, 2010 10:27:11 GMT +01:00 Amsterdam / Berlin /
> Bern / Rome / Stockholm / Vienna
> Subject: Re: [Qt-interest] duplicate symbol
> 
> Em Sexta-feira 01 Outubro 2010, às 09:27:55, Alexander Carôt escreveu:
> > > On Friday 1. October 2010 09.00.15 Alexander Carôt wrote:
> > > > ld: duplicate symbol myWidget::event(QEvent*) in soundjack.o and
> main.o
> > > > 
> > > > How can I fix this ?
> > > 
> > > You declared the same function in both .cpp. Remove from one.
> > 
> > I just did that but then I noticed that the problem is obviously not
> > related to the event loop: I totally deleted the function and then got
> the
> > same error in context with the constructor:
> > 
> > ld: duplicate symbol myWidget::myWidget()in soundjack.o and main.o
> > 
> > Do you have any further hint or is more info required ?
> 
> It's the same hint: the symbol is defined in more than one .cpp.
> 
> Note that all the #includes count as part of the .cpp.
> 
> -- 
> Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org
>   Senior Product Manager - Nokia, Qt Development Frameworks
>       PGP/GPG: 0x6EF45358; fingerprint:
>       E067 918B B660 DBD1 105C  966C 33F5 F005 6EF4 5358
> 
> Qt Developer Days 2010  -  Munich Oct 11-13  -  San Francisco Nov 1-3
> For more information and to register: http://qt.nokia.com/qtdevdays2010
> 
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-- 
http://www.carot.de
http://www.triologue.de
Email : Alexander at Carot.de
Tel.: +49 (0)177 5719797



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