Build with open-source DPC++-LLVM (clang++) broken due to compiler removal of sycl/detail/pi.hpp

[gajanan-choudhary]

Summary

The open-source Intel LLVM compiler recently removed the header file sycl/detail/pi.hpp (among others) in their PR#14145. As a result, building oneMKL Interfaces with latest nightly builds of the compiler is broken. Issue is reproducible with latest nightly drops at this link, but not reproducible (builds fine) with some slightly older drops, e.g. nightly-07-22.

Details

• Compiler version:

  clang version 19.0.0git (https://github.com/intel/llvm.git 44c34c14326a189f719fbbe3393a8ee4a790f1c2)
  

• CMake output log:

  -- CMAKE_BUILD_TYPE: Release
  -- TARGET_DOMAINS: blas
  -- Looking for dpc++
  -- Configuring done
  -- Generating done
  -- Build files have been written to: /export/users/gchoudha/oneMKL-interfaces/build
  Consolidate compiler generated dependencies of target onemkl_blas
  [ 10%] Built target onemkl_blas
  Consolidate compiler generated dependencies of target onemkl_blas_cublas_obj
  [ 20%] Building CXX object bin/blas/backends/cublas/CMakeFiles/onemkl_blas_cublas_obj.dir/cublas_level1.cpp.o
  In file included from /export/users/gchoudha/oneMKL-interfaces/src/blas/backends/cublas/cublas_level1.cpp:20:
  In file included from /export/users/gchoudha/oneMKL-interfaces/src/blas/backends/cublas/cublas_task.hpp:34:
  /export/users/gchoudha/oneMKL-interfaces/src/blas/backends/cublas/cublas_scope_handle.hpp:31:10: fatal error: 'sycl/detail/pi.hpp' file not found
     31 | #include <sycl/detail/pi.hpp>
        |          ^~~~~~~~~~~~~~~~~~~~
  1 error generated.