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Enable AMD OpenCL for OpenCV 2.4.5 .

asked 2013-04-15 03:54:51 -0600

jiapei100 gravatar image

updated 2013-04-15 04:00:24 -0600

Hi, all:

Long time no see. ^_^


  1. Ubuntu 12.10

  2. OpenCV 2.4.5

  3. AMDAPP: AMD-APP-SDK-v2.8-lnx32

  4. Video Card: AMD 6870

I'm trying to play OpenCL with OpenCV 2.4.5. I defaultly installed AMDAPP under /opt/AMDAPP

And while I do a out-of-folder build for OpenCV, I set

  1. OPENCL_ROOT_DIR /opt/AMDAPP/include (this seems to be correct)
  2. OpenCL_DIR OpenCL_DIR-NOTFOUND (always showing NOTFOUND)

I tried to let

  • OpenCL_DIR = /opt/AMDAPP/include
  • OpenCL_DIR = /opt/AMDAPP etc. but nothing worked ever.

My question is: what is OpenCL_DIR if I use a AMD video card and related packages, instead of a NVidia one? Besides AMDAPP, is there anything else that I need to install for OpenCL?

Thank you..

Best Regards Pei

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Have you tried if it works without setting this variable? Probably you don't need it at all...

Guanta gravatar imageGuanta ( 2013-04-15 06:45:59 -0600 )edit

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answered 2013-04-25 17:03:35 -0600

charpentier franck gravatar image

updated 2013-04-27 02:28:32 -0600

OpenCL_DIR appear in opencv-2.4.5/<directory_of_cmake>/CMakeCache.txt I modified the file opencv-2.4.5/cmake/OpenCVDetectOpenCL.make at line 7 by removing the optional QUIET. An now I have the message:

CMake Warning at cmake/OpenCVDetectOpenCL.cmake:7 (find_package):
  By not providing "FindOpenCL.cmake" in CMAKE_MODULE_PATH this project has
  asked CMake to find a package configuration file provided by "OpenCL", but
  CMake did not find one.

  Could not find a package configuration file provided by "OpenCL" with any
  of the following names:


  Add the installation prefix of "OpenCL" to CMAKE_PREFIX_PATH or set
  "OpenCL_DIR" to a directory containing one of the above files.  If "OpenCL"
  provides a separate development package or SDK, be sure it has been

There no package for OpenCL of AMD. The OpenCL_DIR variable is not used for OpenCV with AMD OpenCL.

As against the required variable AMDAPPSDKROOT

Add at /etc/environement


disconnect and reconnect your user and delete old cmake compilation with make clean

let me know

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Asked: 2013-04-15 03:54:51 -0600

Seen: 1,159 times

Last updated: Apr 27 '13