# Re: gr-fosphor : New RTSA-like visualization block for GNURadio using GPU acceleration

**URL:** <https://www.ruby-forum.com/t/re-gr-fosphor-new-rtsa-like-visualization-block-for-gnuradio-using-gpu-acceleration/237212>\
**Category:** GNU Radio\
**Created:** [October 30, 2013, 3:23am UTC](https://www.ruby-forum.com/t/re-gr-fosphor-new-rtsa-like-visualization-block-for-gnuradio-using-gpu-acceleration/237212 "2013-10-30T03:23:51Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Detlef\_R](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/58f4c7/32.png) [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\
**Post date:** [October 30, 2013, 3:23am UTC](https://www.ruby-forum.com/t/re-gr-fosphor-new-rtsa-like-visualization-block-for-gnuradio-using-gpu-acceleration/237212/1 "2013-10-30T03:23:51Z")

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Any ideas as to why cmake is not finding the CL libraries on my  
machine; Fedora 19 x64?

Could NOT find OpenCL (missing: OPENCL\_LIBRARIES)  
CMake Error at CMakeLists.txt:104 (message):  
OpenCL required to compile gr-fosphor

I have added the following environment  
variables with no luck:

export OPENCL\_INCLUDE\_DIR=/usr/include/CL  
export OPEN\_CPP\_INCLUDE\_DIR=/usr/include/CL  
export OPENCL\_LIBRARY=/usr/lib64/nvidia

It looks like everything is there:

ls /usr/include/CL/  
cl\_d3d10.h cl\_dx9\_media\_sharing.h cl\_gl\_ext.h cl.h cl\_platform.h  
cl\_d3d11.h cl\_ext.h cl\_gl.h cl.hpp opencl.h

ls /usr/lib64/nvidia/  
libcuda.so.1 libnvidia-ifr.so.325.15  
libcuda.so.325.15 libnvidia-ml.so.1  
libGL.so.1 libnvidia-ml.so.325.15  
libGL.so.325.15 libnvidia-opencl.so.1  
libnvcuvid.so.1 libnvidia-opencl.so.325.15  
libnvcuvid.so.325.15 libnvidia-tls.so.1  
libnvidia-cfg.so.1 libnvidia-tls.so.325.15  
libnvidia-cfg.so.325.15 libnvidia-vgxcfg.so  
libnvidia-compiler.so.1 libnvidia-vgxcfg.so.1  
libnvidia-compiler.so.325.15 libnvidia-vgxcfg.so.325.15  
libnvidia-encode.so.1 libOpenCL.so.1  
libnvidia-encode.so.325.15 libOpenCL.so.1.0.0  
libnvidia-glcore.so.1 tls  
libnvidia-glcore.so.325.15 xorg  
libnvidia-ifr.so.1

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<div class="post-metadata">

**Author:** ![madengr](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/ec9cab/32.png) [@madengr](https://www.ruby-forum.com/u/madengr)\
**Post date:** [October 30, 2013, 3:34am UTC](https://www.ruby-forum.com/t/re-gr-fosphor-new-rtsa-like-visualization-block-for-gnuradio-using-gpu-acceleration/237212/2 "2013-10-30T03:34:57Z")

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On 10/29/2013 07:22 PM, Louis B. wrote:

> export OPENCL\_INCLUDE\_DIR=/usr/include/CL  
> export OPEN\_CPP\_INCLUDE\_DIR=/usr/include/CL  
> export OPENCL\_LIBRARY=/usr/lib64/nvidia

Try passing in the full path to libOpenCL.so to cmake:

-DOPENCL\_LIBRARY=/path/to/libOpenCL.so

-josh