[Bug 1573234] Re: unable to link: cannot find libvtkproj4

[Łukasz Zemczak]

Hello Jackie, or anyone else affected,

Accepted vtk6 into xenial-proposed. The package will build now and be
available at
https://launchpad.net/ubuntu/+source/vtk6/6.2.0+dfsg1-10ubuntu0.1 in a
few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.  Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, what testing has been
performed on the package and change the tag from verification-needed-
xenial to verification-done-xenial. If it does not fix the bug for you,
please add a comment stating that, and change the tag to verification-
failed-xenial. In either case, without details of your testing we will
not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance for helping!

N.B. The updated package will be released to -updates after the bug(s)
fixed by this package have been verified and the package has been in
-proposed for a minimum of 7 days.

** Changed in: vtk6 (Ubuntu Xenial)
       Status: In Progress => Fix Committed

** Tags added: verification-needed verification-needed-xenial

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https://bugs.launchpad.net/bugs/1573234

Title:
  unable to link: cannot find libvtkproj4

Status in pcl package in Ubuntu:
  New
Status in vtk6 package in Ubuntu:
  Fix Released
Status in pcl source package in Xenial:
  Confirmed
Status in vtk6 source package in Xenial:
  Fix Committed

Bug description:
  [Impact]

   * Any code that links to libraries provided by libpcl1.7 (which
  depends on vtk6) fails to link because it cannot find vtkproj4 (see
  https://github.com/PointCloudLibrary/pcl/issues/1594 for example)

   * This has been fixed in Debian, but in a way that breaks ABI

   * See this change through all the way by adding libproj-dev as a
  dependency to libvtk6-dev, and rebuild pcl such that it uses the
  system libproj instead of the vtk-vendored libproj

   * IMPORTANT: This fix is a two-patch fix, one for vtk6 (adding the
  missing dependency) and one for pcl (a no-change rebuild using the
  earlier patch for vtk6). As a result, they cannot be uploaded into
  -proposed at the same time. vtk6 must happen first, and pcl only once
  vtk6 has been built.

  [Test Case]

   * Build software that uses PCL (e.g. https://github.com/ros-
  perception/perception_pcl) and watch it fail

   * Apply this patch, build and install vtk6-dev, then rebuild PCL
  using it. Then watch your previous build failure succeed.

  [Where problems could occur]

   * This patch doesn't change ABI or API, but does add a dependency

   * Problems could potentially occur if clients worked around this
  issue by hacking their projects to link to vtkproj, but known users
  (ROS) have vendored Debian's fix into their repos as opposed to
  working around the bug, thus regressions seem unlikely

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