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From: Michael Schreckenbauer <grimlog@gmx.de>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] Re: Plasma-runtime compilation problems
Date: Thu, 11 Aug 2011 00:04:30 +0200
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Hi,

Am Mittwoch, 10. August 2011, 14:40:31 schrieb walt:
> On 08/09/2011 08:34 PM, Jeff Cranmer wrote:
> > Hi all,
> > 
> > I'm trying to upgrade kde from 4.4 to 4.6, and I've run into a problem.
> > 
> > Plasma-runtime-4.6.3 is failing.  The error appears to be
> > redefinition of 'struct QMetaTypeID<Plasma::Service*>'
> 
> I don't use kde so I can't be specific, but usually a redefinition is
> just a warning -- unless the package is compiled with the -Wall flag or
> equivalent.

No, this is plain wrong. Redefinition of a struct is an error in C and C++

~$cat foo.c
struct foo {
        int i;
};

struct foo {
        char* v;
};

~$gcc foo.c -o foo
foo.c:5:8: error: redefinition of 'struct foo'
foo.c:1:8: note: originally defined here

-Wall enables some more warnings and has nothing to do with errors at all.
-Werror is the switch that turns warnings into errors.

Regards,
Michael