* using log directory 'd:/Rcompile/CRANpkg/local/4.0gcc8/OpenCL.Rcheck'
* using R version 4.0.0 RC (2020-04-17 r78247)
* using platform: x86_64-w64-mingw32 (64-bit)
* using session charset: ISO8859-1
* checking for file 'OpenCL/DESCRIPTION' ... OK
* this is package 'OpenCL' version '0.2-1'
* checking package namespace information ... OK
* checking package dependencies ... OK
* checking if this is a source package ... OK
* checking if there is a namespace ... OK
* checking for hidden files and directories ... OK
* checking for portable file names ... OK
* checking whether package 'OpenCL' can be installed ... ERROR
Installation failed.
See 'd:/Rcompile/CRANpkg/local/4.0gcc8/OpenCL.Rcheck/00install.out' for details.
* DONE
The installation logfile:
* installing *source* package 'OpenCL' ...
** package 'OpenCL' successfully unpacked and MD5 sums checked
** using staged installation

ERROR: OCL not set!

You will need a working OpenCL SDK with headers
and libraries for both i386 and x64

Set OCL to the root of the SDK

You can also set individial variables OCLINC,
OCL32LIB and OCL64LIB. If they are not set,
the default layout will be assumed.

ERROR: configuration failed for package 'OpenCL'
* removing 'd:/Rcompile/CRANpkg/lib/4.0gcc8/OpenCL'