** Description changed:

- This issue has been reported and fixed in Debian:
+ [Impact]
  
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=819741
+  * 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)
  
- Currently any code that links to libraries provided by libpcl1.7 (which
- depends on vtk6) fails to link because it cannot find vtkproj4.
+  * This has been fixed in Debian
  
- An example of affected downstream code is available here:
- https://github.com/PointCloudLibrary/pcl/issues/1594
+  * The attached debdiff is simply an SRU of the upstream Debian fix
  
- Please sync with vtk6 version 6.2.0+dfsg1-11 so that downstream code can
- link to libraries provided by vtk6.
+ [Test Case]
+ 
+  * Build software that uses PCL (e.g. https://github.com/ros-
+ perception/perception_pcl) and watch it fail
+ 
+  * Apply this patch, and watch it succeed
+ 
+ [Where problems could occur]
+ 
+  * This patch seems tiny, but given that part of it is disabling a patch that 
is currently applied in Xenial (102_enable_system_proj4_lib.patch) it is larger 
than it first appears
+  
+  * I believe the change introduced is backward compatible, but it could use a 
double check from a more experienced eye

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

Title:
  unable to link: cannot find libvtkproj4

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