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[Christoph Spiel <cspiel@xxxxxxxxxx>]

WRT your original errors.  They point to outdated OpenCL header files.
Ask your sysadmin to get the most recent versions from
    http://www.khronos.org/opencl/
and install them in the appropriate place.

Next thing on her agenda is to update the OpenCL libraries to their
latest versions.  Again, the older versions tend to be much buggier
than recent ones.

The complete OpenCL environment (headers, drivers, libraries, etc.)
must work perfectly before you can expect Enblend to even try to
utilize the GPU.

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https://bugs.launchpad.net/bugs/1305794

Title:
  OpenCL enabled build fails

Status in Enblend:
  New

Bug description:
  My newly built enblend binary printed a lot of those lines:
  enblend: info: no OpenCL support compiled into Enblend

  So I looked into how to compile enblend with OpenCL support.
  I've found this cmake switch:
  -DENABLE_OPENCL:BOOL=ON

  and this package in my repos:
  nvidia-opencl-dev

  Next I got an error from make package right at the beginning:
  /bin/sh: 1: cannot create /home/kaefert/src/enblend/enblend.build_1044/src/kernels/distance_transform_fh.icl: Directory nonexistent

  So I created the directory manually, and now my compiling fails after 44% with a lot of lines like those:
  opencl.cc:(.text._ZN3ocl12LazyFunctionINS_16SourceFilePolicyEE5buildERKSs[_ZN3ocl12LazyFunctionINS_16SourceFilePolicyEE5buildERKSs]+0x1d6): undefined reference to `clReleaseDevice'
  opencl.cc:(.text._ZN3ocl12LazyFunctionINS_16SourceFilePolicyEE5buildERKSs[_ZN3ocl12LazyFunctionINS_16SourceFilePolicyEE5buildERKSs]+0x2d9): undefined reference to `clRetainDevice'

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