Re: [Qemu-devel] PATCH: fix usb-linux.c compile orror

[Robert Reif]

Anthony Liguori wrote:
> Vince Weaver wrote:
> > On Mon, 29 Sep 2008, Anthony Liguori wrote:
> > > Robert Reif wrote:
> > > > RH9 system (2.4.20-31.9smp).
> > >
> > > Huh.  I'm amazed it compiles with just that change on such an old 
> > > kernel.
> >
> > I have similar problems compiling on a SuSE 10.1 system which really 
> > isn't that old.  Since I only use linux-user I'd been too lazy to 
> > investigate the problem.
> >
> > Why should Qemu not build on older systems?  I'd imagine that linux 
> > 2.4 / 2.6 compatability would be easier to handle than linux /OSX 
> > /Windows compatability.
>
> I think we should support 2.4 kernels FWIW.  I'm just waiting for 
> someone to send a patch that adds a configure check instead of 
> breaking the build for newer kernels.
>
> I think the best way to do it would be to try and detect the right 
> header files for usb pass through in configure, and disable 
> usb-linux.c entirely if they aren't available.
>
> Regards,
>
> Anthony LIguori
>
> > Vince
The problem in this instance is that a structure that usb uses was 
copied from a linux header file so the c file wasn't dependent on linux 
headers.  Unfortunately the c file wasn't changed to use the new structure.