Le mardi 09 septembre 2014 à 15:17 +0200, Helmut Grohne a écrit : > > Given that transitions are now frozen for Jessie, and given that the > > freeze is less than 2 months ahead, I think that this is too big a > > change to be implemented now, for several reasons: it involves multiple > > packages (blas, lapack, atlas, openblas); it needs coordinated changes > > in those packages, which means that they must all transition to testing > > at the same time; the change is tricky because it involves lots of code > > in maintainer scripts, with possible problems on upgrade paths; I will > > have almost no time in October for Debian. > > I agree that any way to solve this issue involves severe changes, which > may be unsuitable for jessie. But for jessie we do not have to > Multi-Arch blas. It suffices to make it Multi-Arch safe. > > > If you come up soon with working patches for these 4 packages, I will do > > my best to review and upload them. Otherwise I don't think that this > > move is realistic before the freeze. > > Let me propose another funky workaround for jessie: > > Introduce a new, empty arch:any package (whose sole purpose is to > exist). Do not mark it as Multi-Arch anything (this is crucial and why > you cannot reuse things like libc6 or dpkg for this). Then have all blas > implementations depend on this package. > > Any blas implementation being installed will pull in the new package for > the architecture. Any other blas implementation will only be installable > for the same architecture now. > > Even though, this goes through NEW and has to touch at least four > packages, it does not cause a transition. It also does not cause the > update-alternatives handling to change. What do you think?
Thanks for suggesting this alternative solution, which I think is a good compromise for jessie. It is a bit ugly, but I don't see any other way of forbidding M-A co-installability of two different packages. Hopefully the ftpmasters won't oppose this. I'll try to implement this soon. -- .''`. Sébastien Villemot : :' : Debian Developer `. `' http://www.dynare.org/sebastien `- GPG Key: 4096R/381A7594
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