** Description changed: [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 + * Install vtk6-dev and libpcl-dev from Xenial - * Apply this patch, build and install vtk6-dev, then rebuild PCL using - it. Then watch your previous build failure succeed. + * Use them to build this project: https://github.com/kyrofa/pcl-sru- + test (borrowed from the bug referenced above) . + + * You'll first note that it fails to build because it needs libproj-dev + installed. Apply the first patch (to vtk) in this SRU, rebuild and + install that version of vtk. + + * Build again, and you'll note that it fails to link to vtkproj4. This + is libproj that was vendored by vtk, but should not be used at all in + Xenial (it's actually building against the system libproj). This is + fixed by the second patch (to pcl) in this SRU, a no-change rebuild that + causes the cmake config to be regenerated to properly link to the system + libproj instead of the vtk-vendored libproj. Rebuild and install that + version of pcl. + + * Finally, the build should 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
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1573234 Title: unable to link: cannot find libvtkproj4 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pcl/+bug/1573234/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
