Re: Make ocaml-best-compilers non-virtual
On Thu, Nov 03, 2016 at 12:28:00PM +0000, Ximin Luo wrote:
> Ximin Luo:
> > Johannes Schauer:
> >> Hi,
> >>
> >> Quoting Ralf Treinen (2016-11-02 08:56:32)
> >>> On Mon, Oct 31, 2016 at 09:13:19AM +0100, Johannes Schauer wrote:
> >>>> Quoting Ximin Luo (2016-10-31 08:35:00)
> >>>>> However, if I simply add "ocaml-best-compilers (>= 4.03.0)" into
> >>>>> Build-Depends I still get an error like:
> >>>>>
> >>>>> dpkg-checkbuilddeps: error: Unmet build dependencies: ocaml-best-compilers (>= 4.03.0)
> >>>>>
> >>>>> so it looks like we can't do this for virtual packages. (Yes, I do have
> >>>>> 4.03.0 installed For Sure Totally).
> >>>>
> >>>> yes, see policy §7.5:
> >>>>
> >>>> "If a relationship field has a version number attached, only real packages will
> >>>> be considered to see whether the relationship is satisfied"
> >>>
> >>> Policy is lagging behind reality in this respect, but it is not the only
> >>> place where policy is not up to date. We have versionend provides since
> >>> quite some time, and we have versionend dependencies on virtual packages
> >>> in the archive (on python-cffi-backend-api-min, for instance).
> >>
> >> indeed. So while you cannot do "ocaml-best-compilers (>= 4.03.0)" and expect it
> >> to resolve to a package which just
> >>
> >> Provides: ocaml-best-compilers
> >>
> >> It will work for a package which states:
> >>
> >> Provides: ocaml-best-compilers (= 4.03.0)
> >>
> >> Notice, that only the "=" relationship can (so far) be used in the Provides
> >> field. So the following might work in debian/control:
> >>
> >> Provides: ocaml-best-compilers (= ${binary:Version})
[..]
> This is several hours after 4.03.0-5 was built and uploaded into FTP. Are you guys sure that aspcud/apt-cudf can support versioned virtual Build-Depends?
It works with dose-builddebcheck, so I assume it also works with
apt-cudf, but I couldn't check it.
Note that the two successes of building ocamlbuild where using older
versions of ocaml, namely
4.03.0-4 on hurd
4.03.0-3 on x32
I think we had this discussion earlier: why do you need a
build-dependency of ocamlbuild on ocaml-best-compilers? I thought
that you said in the earlier discussion that you don't need it.
-Ralf.
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