Re: [Qemu-devel] [RFC] How to handle feature regressions in new QEMU releases

[Paolo Bonzini]

Il 16/07/2014 18:28, Stefan Weil ha scritto:
> Debian testing includes a brand new libiscsi, but it
> does not include libiscsi.pc, so pkg-config won't know that it is
> available and configure will disable libiscsi.

That's a packaging bug.

> I have a patch which
> fixes this, so QEMU for Debian testing could include libiscsi again.
>
> Is a feature regression like this one acceptable? Do we need additional
> testing (maybe run the build bots with --enable-xxx, so builds fail when
> xxx no longer works)?

As mentioned in the e49ab19fcaa617ad6cdfe1ac401327326b6a2552 commit 
message, this was intentional.  I was reluctant to do it, but ultimately 
Peter Lieven convinced me that it isn't just about using fancy new APIs; 
libiscsi was too buggy to be useful until release 1.8.0 (even 1.9.0 
requires a patch to avoid segfaults, and many more if you want to run it 
on ARM).

Paolo