Hello, I am a maintainer on the LightGBM project, focused on that project's R package. The R package is not available on CRAN yet (we are working on it), so for now our users must build it from source.
The package includes compilation of a C++ library, and we link to R.dll / R.so to use R-provided functions like Rprintf. With the release of R4.0 and Rtools40, we recently received reports from our users that they are unable to build our package on Windows systems with R 4.0 and Rtools 4.0 (https://github.com/microsoft/LightGBM/issues/3064). After some investigation, I've learned that the following changes in Rtools40 (relative to Rtools35) broke our installation process: - *gendef.exe* was removed - *mingw32-make.exe* was removed - paths like "mingw_64/bin" were changed to "mingw64/bin" I do not expect that our off-CRAN installation process is supported. I understand that by maintaining our own process, we are taking on the burden of keeping up with new releases of R and Rtools. My question is this...is there public documentation about why the changes I mentioned above were made? I have not found any mention of them in the following places, and am not sure where else to look. - https://cran.r-project.org/bin/windows/Rtools/ - https://github.com/r-windows/docs/blob/master/faq.md#readme - https://jeroen.github.io/rstudio2019 Thank you very much for your time and consideration, -James Lamb [[alternative HTML version deleted]] ______________________________________________ R-package-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-package-devel
