OpenCL platform ID is empty; fsycl-target: spir64_x86_64

[dosarudaniel]

When I am trying to compile this sample code (make test12) , with this coammand:

clang++ -O3 -DNDEBUG CMakeFiles/test12.dir/test12.cpp.o -o test12  -Wl,-rpath,/usr/local/lib /home/dadosaru/local/lib/libvecgeom.a /home/dadosaru/local/lib/libvecgeomcuda_static.a /home/dadosaru/local/lib/libvgdml.a -fsycl -fsycl-unnamed-lambda \
-fsycl-targets=spir64_x86_64-unknown-unknown-sycldevice,nvptx64-nvidia-cuda-sycldevice \
-Xsycl-target-backend=nvptx64-nvidia-cuda-sycldevice \
--cuda-gpu-arch=sm_61 \
-std=c++20 -stdlib=libstdc++ -Wno-unknown-cuda-version -D_ONEADEPT_ -DNDEBUG -DROOT_NO_INT128 -DG4HepEm_CUDA_BUILD -I/home/dadosaru/oneAdePT/../local/include /home/dadosaru/local/lib/libvecgeom.a -ldl -lrt -lpthread /usr/local/lib/libxerces-c.so

I get this error:

OpenCL platform ID is empty
OpenCL platform name is empty
Failed to find any of these OpenCL platforms:
  Intel(R) OpenCL
  Intel(R) CPU Runtime for OpenCL(TM) Applications
llvm-foreach: 
clang-13: error: x86_64 compiler command failed with exit code 1 (use -v to see invocation)

Is something wrong with my environment or is it a bug?

If I remove the spir64_x86_64-unknown-unknown-sycldevice from fsycl-targets it compile and link just fine.

[alexbatashev]

You're trying to build your image for x86_64 platform in AOT mode. This requires you to have a fully set up OpenCL CPU device (see Get Started Guide). The way it works is the compiler will produce a SPIR-V binary, and feed it to opencl-aot tool which will essentially call some OpenCL APIs to produce the x64 binary executable, which can later be consumed by OpenCL runtime directly. If you want to simply build platform-agnostic SPIR-V, you should use spir64-unknown-unknown-sycldevice target.

[dosarudaniel]

Thanks!
I've followed these steps as you suggested to Install the low level runtime and it worked.