Relevant discussion. It appears all packages need to transition to B-D on libtiff5-dev.
-------- Original Message -------- Subject: Re: Why does libgeotiff-dev depend on libtiff5-dev ? Date: Sat, 15 Jun 2013 16:35:55 -0600 From: Gordon Haverland <ghave...@materialisations.com> Reply-To: ghave...@materialisations.com Organisation: Matter Realisations To: Alastair McKinstry <mckins...@debian.org> On June 15, 2013, you wrote: > Hi, > > I'm investigating > http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=711789 and > wondering whats going on: > > Grads fails to build due to a B-D conflict, > > grads (= 2:2.0.1-1) build-depends on one of: > - libgeotiff-dev (= 1.3.0+dfsg-3) > libgeotiff-dev (= 1.3.0+dfsg-3) depends on one of: > - libtiff5-dev (= 4.0.2-6) > libtiff4-dev (= 3.9.6-11) and libtiff5-dev (= 4.0.2-6) > conflict libgd-dev (= 2.1.0~rc2-1) depends on one of: > - libtiff4-dev (= 3.9.6-11) > libgd2-xpm-dev (= 2.1.0~rc2-1) depends on one of: > - libgd-dev (= 2.1.0~rc2-1) > grads (= 2:2.0.1-1) build-depends on one of: > - libgd2-xpm-dev (= 2.1.0~rc2-1) > - libgd-dev (= 2.1.0~rc2-1) > > > I'm unfamiliar with the history of libtiff4 / tiff5, but > libgd-dev depends on libtiff-dev ; can anyone answer: > (1) why does libgeotiff-dev depend on libtiff5-dev? > (2) why libtiff5-dev not provide the virtual libtiff-dev? > > Best regards > Alastair Greetings. I am not a developer or a Debian maintainer. I have built stuff before. A little while ago (weeks), there was a problem with TeXLive that if people ran into a problem with a package not installing (I think the package was tex-common) in unstable, that a user could either downgrade libkapthsea by one version, or upgrade to all of the 2013 TeXLive. In the discussion of that bug, was a reference to this libtiff-4/5 dichotomy. I believe the tie in to TeX is involving ghostscript. As near as I can tell, the cause for the libtiff-4/5 dichotomy, is libjpeg related. Aparently libjpeg is not being developed by Independent JPEG group any more. Maybe. Debian was using JPEG-8. Some person has apparently taken over the title of Independent JPEG Group, and has started development on a JPEG-9. Somebody forked JPEG-8, and produced a faster library that is supposed more useful. Some distirbutions of Linux are following the faster fork, and some are following this IJG thing which may or may not be a continuation of JPEG-8. And someone asked questions about OpenJPEG. It kinds of sounds like the Debian maintainer wants to go JPEG-9 from IJG, and apparently Fedora is following the faster fork. One branch is tied to libtiff-4, and the other to libtiff-5. And that is as far as I got in investigating. And I may be completely wrong. Gord
