Please help with CL_LINK_PROGRAM_FAILURE error with clLinkProgram of library

OpenCL
7

I actually succeeded now in creating a library of my noise-generation code to be used in a kernel. I learned now something about OpenCL Nvidia driver that isn’t obvious from the error messages.

  1. my NVIDIA GeForce GTX 1050 doesn’t support the OpenCL intermediate language. So I couldn’t use clCreateProgramWithIL. Version OpenCL 3.0 CUDA 11.4.112 and Profile: FULL_PROFILE but no IL support.
  2. I have to include all sources in the library as one big string. Then OpenCL can compile and link them as a library.
  3. The header files are just cl_program objects that are not compiled. That means that for each header file you want to add you must just do clCreateProgramWithSource and not clBuildProgram or clCompileProgram.
  4. Code can’t be double. That means that you need to make sure that function/definitions in your library are not copied in your final kernel code. I had a random numbers generator code both in my lib and in my kernel included and this doesn’t work.

But finally it works. Now I can compile beforehand my noise generator functions in a OpenCL library and use it in any kernel I like. Sadly the GTX 1050 doesn’t support IL so I have to compile the library every time I start the application.

For curious people my code is here

https://github.com/devent/anl-opencl/blob/develop/anlopencl/src/test/cpp/OpenCLContext.cpp#L252