[Qt4-preview-feedback] TONS of dllimport warnings when using MinGW + GCC 4.3

[Juergen Hunold]

Hi Sven !

On Friday 06 February 2009, Sven Grunewaldt wrote:
> Just for the fun of it I compiled the RC and the latest QtCreator
> with GCC 4.3 (http://www.tdragon.net/recentgcc/) and everything
> worked perfectly!

Nice to hear. Seems I got all my patches in ;-))

> Now, when I compile one of my applications, I get hundreds of
> warnings like these:
> E:/Entwicklung/Qt/Berichte-Ork/../../lib/qt-4.5.0-rc1/include/QtCore/
>../../src/corelib/tools/qbitarray.h:53: warning: 'uint qHash(const
> QBitArray&)' redeclared without dllimport attribute: previous
> dllimport ignored
>
> QtCreator sums them up to 209.
> This is quite a killer since I can't really find warnings that I
> produced with my code between all this stuff.

The same here.

> Is it at least possible to hide these specific warnings?

This is not a Qt  problem. This happens if you don't use "auto-import" 
but dllexport/dllimport directly. This happend in our own code, too, so 
I've disabled it again.

I believe this is
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34749

a known mingw-4.3.x problem.

Hope this helps !

Yours,

Jürgen
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