On May 3, 2012 10:20 AM, "Andres Mejia" <amejia004@gmail.com> wrote:

>

> On May 3, 2012 9:30 AM, "Pino Toscano" <pino@debian.org> wrote:

> >

> > Alle giovedì 3 maggio 2012, Andres Mejia ha scritto:

> > > On Thu, May 3, 2012 at 3:44 AM, Pino Toscano <pino@debian.org> wrote:

> > > > Package: libav

> > > > Version: 6:0.8.1-7

> > > > Severity: important

> > > >

> > > > Hi,

> > > >

> > > > libav 6:0.8.1-7 reenables the use of opencv... which itself uses

> > > > libav libraries. This currently makes libav unbuildable on mipsel

> > > > and hurd-i386, and generically makes libav no more bootstrap'able

> > > > without having itself compiled already.

> > > > Could you please drop the opencv usage again, please?

> > > >

> > > What could be done instead is a binary only upload with opencv

> > > support disabled (i.e. use dpkg-buildpackage -B). Doing it on our

> > > end will not require changing the version. Once this package is

> > > uploaded, the release team can then be asked to do a binNMU for

> > > these archs, which will bring back opencv support since the archive

> > > will contain the regular *.debian.tar.gz changes that included

> > > opencv.

> > >

> > > I believe this is better than doing a full build on all archs without

> > > opencv, then doing another build with opencv.

> >

> > This mess (which is only a mess, not a clean solution) does not solve at

> > all the fact that you cannot do a clean build of libav without having

> > libav compiled already (for opencv).

> > I don't see this as a viable solution, especially if in the future the

> > epoch is raised bringing again conflicts between the old libav libraries

> > and the new one.

> >

> > --

> > Pino Toscano

>

> I'm not entirely certain how build circular dependency issues like this are resolved. Perhaps we should ask for help from the toolchain package maintainers or debian-devel.

>

> ~ Andres


Hello all,

I would like to know if there is a good (perhaps best) approach in resolving issues with packages with circular build dependencies.


Libav has various circular build dependencies including.


libav -> opencv -> libav

libav -> x264 -> libav

libav -> x264 -> gpac -> libav


I found some mention of this issue at [1]. This however doesn't offer any clear solution.


1. http://wiki.debian.org/DebianBootstrap


~ Andres