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[Timo Aaltonen <tjaalton@xxxxxxxxxx>]

so it's actually a bug in the apt resolver, there's no point modifying
every package depending on libgl1-mesa-dev to add lts-packages as valid
candidates to fulfil the dep.

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https://bugs.launchpad.net/bugs/1424466

Title:
  Devel package not installable in 14.04.2 (mesa-lts-utopic

Status in apt package in Ubuntu:
  New
Status in mesa package in Ubuntu:
  Invalid
Status in apt source package in Trusty:
  New
Status in mesa source package in Trusty:
  Fix Released

Bug description:
  [Impact] 
   * Some -dev packages like ubuntu-sdk and libglew-dev cannot be installed when the lts-utopic stack is used.

  [Test Case]
   * Install the lts-utopic stack.
   * apt-get install ubuntu-sdk
   * Good: you get a whole list of packages to install.
   * Bad: apt-get install fails like pasted in the original bug report.
   * Also test the same without the lts-utopic stack, to make sure there are no regressions.

  [Regression Potential] 
   * Low, this has been done for precise before, and mesa packaging has to be updated for every LTS release. Unfortunately there are no alternatives. :(

  [Other Info]
   * There's probably an apt bug in here too. Nudging the resolver by specifying libgl1-mesa-dev-lts-utopic and libgles2-mesa-dev-lts-utopic works, but I didn't find a good way to express this in the depends, and that would have to be done for every package.

  [Original bug report]
  Not the first, likely not the last devel to not be installable in 14.04.2 or any mesa-lts-utopic install
  Another one is libglew-dev

   sudo apt-get install freeglut3-dev
  Reading package lists... Done
  Building dependency tree
  Reading state information... Done
  Some packages could not be installed. This may mean that you have
  requested an impossible situation or if you are using the unstable
  distribution that some required packages have not yet been created
  or been moved out of Incoming.
  The following information may help to resolve the situation:

  The following packages have unmet dependencies:
   libcheese-gtk23 : Depends: libclutter-gtk-1.0-0 (>= 0.91.8) but it is not going to be installed
                     Depends: libcogl15 (>= 1.15.8) but it is not going to be installed
   libcheese7 : Depends: libclutter-gst-2.0-0 (>= 0.10.0) but it is not going to be installed
                Depends: gstreamer1.0-clutter but it is not going to be installed
   libclutter-1.0-0 : Depends: libcogl-pango15 (>= 1.15.8) but it is not going to be installed
                      Depends: libcogl15 (>= 1.15.8) but it is not going to be installed

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: freeglut3-dev (not installed)
  ProcVersionSignature: Ubuntu 3.16.0-31.41~14.04.1-generic 3.16.7-ckt5
  Uname: Linux 3.16.0-31-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.7
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Sun Feb 22 18:03:30 2015
  InstallationDate: Installed on 2015-02-08 (14 days ago)
  InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150203.2)
  SourcePackage: freeglut
  UpgradeStatus: No upgrade log present (probably fresh install)

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