Re: [Qemu-devel] [RFC PATCH] Allow building without graphics support

[Scott Wood]

On 12/13/2012 09:16:58 AM, Gerd Hoffmann wrote:
>   Hi,
>
> >> A pretty central data structure in qemu (DisplayState /
> >> DisplaySurface) carries a pixman image, not some module which can
> >> easily be made optional.  Just look at the tons of #ifdef'ery you
> >> have to do to get this going.
> >
> > His point is that anything related to DisplayState should be
> > optional.
>
> We can try, but sprinkling #ifdefs all over the place isn't the way to
> go.  Separate any Display* stuff, say to display.[ch].  Include
> display.h only when needed.  Then not compiling the object files
> will do the trick, and maybe one or two #ifdefs in vl.c.
>
> At least in theory.  In practice it probably needs some more cleanups  
> so
> it actually works.

That's fine.  This patch was more of a quick hack to show that it's  
possible, and to start a conversation about whether a cleaner approach  
would be accepted if the effort were spent on it.

> And the "not compiling" part brings us back to the "easy way to strip
> down qemu" part.  I'd love to have something (kconfig?) which allows  
> to
> pick which device emulations, block formats, ... I wanna include into  
> qemu.

Yes, kconfig would be very nice.

-Scott