[fedora-virt] a few comment about the current virt pacakges

Daniel P. Berrange berrange at redhat.com
Sun May 24 12:49:09 UTC 2009

On Fri, May 22, 2009 at 09:41:01PM +0200, Farkas Levente wrote:
> Daniel P. Berrange wrote:
> > On Fri, May 22, 2009 at 02:04:28PM +0200, Farkas Levente wrote:
> >> Daniel P. Berrange wrote:
> >>> On Fri, May 22, 2009 at 01:23:06PM +0200, Farkas Levente wrote:
> >>>> Daniel P. Berrange wrote:
> >>>>> On Fri, May 22, 2009 at 11:23:01AM +0200, Farkas Levente wrote:
> >>>>>> - libvirt BR qemu. why? which require all qemu package which require
> >>>>>> openbios-ppc, vgabios, bochs-bios-data, etherboot-*. so this is a
> >>>>>> dependency hell. imho it'd be useful to clean up!
> >>>>> The build process wants QEMU so its a BR. There is no dependancy hell
> >>>>> here unless you're using the wrong tools. mock trivially pull in the 
> >>>>> chain of deps as needed during build, so there's nothing to 'clean up'.
> >>>> i can't build (since i don't have ppc) but i need it for qemu-system-ppc
> >>>> which is needed by qemu which is needed by libvirt:-(
> >>>> are you sure all of these req and br are required?
> >>> You're not making any sense here. You don't need a ppc host, to build
> >>> qemu-system-ppc. All host architectures can build all QEMU targets,
> >>> you're not restricted to matching host & qemu target, with the exception
> >>> of KVM.
> >> i wrote above i can't build openbios-ppc which required by qemu etc...so
> >> i can't build libvirt:-(
> > 
> > Then just disable the qemu-system-ppc bits in QEMU. It really isn't hard 
> > to remove the ppc sub-RPM and change the target-list  for the QEMU build 
> > to turn off ppc.
> this means even on a primary platform ix86 these packages can't be
> rebuild without modification.
> wouldn't be easier to put back openbios-ppc, vgabios, bochs-bios-data,
> etherboot into qemu?

These packages were split out from QEMU because, they were duplicating 
functionality in Bochs & QEMU packages. It was also not clear that they 
were in compliance with the license, because there was no corresponding
source to the pre-built binary being shipped. You fundamentally can't
build many of these packages on all archs. This last reason is the real
key bit. openbios-ppc can only be built from source on a PPC host, so
we need to build on PPC, and then include that built binary on a 2nd
build on all other archs. The only practical way todo this is if the
BIOS is separate from QEMU, otherwise you end up havig to rebuild far
too much stuff each time. 

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