В Fri, 22 Aug 2025 16:05:31 +0200 quirin stier <quirin_st...@gmx.de> пишет:
> Hi everyone, > > building an R package following the work of Simon Urbanek > (https://github.com/s-u/OpenCL and > https://cran.r-project.org/web/packages/OpenCL/index.html) still > yields the error from CRAN about environmental variables required for > linking. In theory, copying the OpenCL approach should have been enough (most Windows users would get the binaries from CRAN and not worry about environment variables), except (as you point out) OpenCL is not currently built on Win-Builder for R-release and R-devel (only R-oldrel works). I think you need to ask Uwe Ligges to help set up the OpenCL SDK for R-release and R-devel the same way it's set up for R-oldrel. But there might be a better solution: > Could you please tell me more about the procedure (or possible > formalities with CRAN) how to submit an R package using OpenCL > headers? Since a free software (Apache-2.0) OpenCL SDK exists [1], it could be made part of Rtools, which is the recommended approach for non-trivial third-party dependencies [2]. It's already packaged in MSYS2 [3], but not in MXE. I think the best way forward is to write an MXE Makefile [4] to produce a package with the OpenCL headers, the import library, and the ICD loader. There is one complication: unlike most third-party dependencies in Rtools, OpenCL must be dynamically linked. This probably means packaging OpenCL.dll and putting it on the %PATH% (so that R packages can be built and loaded even on systems without a real OpenCL ICD). Hopefully this won't cause any conflicts with the system OpenCL.dll (all it needs to do is export a standard set of functions and look for ICDs in standard locations). Someone even started that work back in 2017 [5], but didn't complete it. Try contacting the people who worked the GitHub pull request, see if they need any help. When MXE accepts the patch, or if you get stuck, ask Tomas Kalibera about including the two packages in Rtools. -- Best regards, Ivan [1] https://github.com/KhronosGroup/OpenCL-ICD-Loader https://github.com/KhronosGroup/OpenCL-Headers [2] https://cran.r-project.org/web/packages/external_libs.html#Windows [3] https://packages.msys2.org/base/mingw-w64-opencl-headers https://packages.msys2.org/base/mingw-w64-opencl-icd [4] https://mxe.cc/#creating-packages [5] https://github.com/mxe/mxe/pull/1938 ______________________________________________ R-package-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-package-devel
