В Thu, 21 Mar 2024 18:32:59 +0000 Annaig De-Walsche <annaig.de-wals...@inrae.fr> пишет:
> If ever I condition the use of OpenMD directives, users will indeed > be capable of installing the package, but they wont access to a > performant version of the code, as it necessitates the use of OpenMD. > Is there a method to explicitly express that the use of OpenMD is > highly encouraged? I think the most practical method would be to produce a packageStartupMessage() from the .onAttach function of your package if you detect that the package has been compiled without OpenMP support: https://cran.r-project.org/doc/manuals/R-exts.html#Load-hooks > In practical, how to know from R code if OpenMP is present or not? Your C code will have to detect it and provide this information to the R code. WRE 1.6.4 says: >> [C]heck carefully that you have followed the advice in the >> subsection on OpenMP support [WRE 1.2.1.1]. In particular, any use >> of OpenMP in C/C++ code will need to use >> >> #ifdef _OPENMP >> # include <omp.h> >> #endif <https://cran.r-project.org/doc/manuals/R-exts.html#Portable-C-and-C_002b_002b-code> Similarly, any time you use #pragma omp ... or call omp_set_num_threads(), it needs to be wrapped in #ifdef _OPENMP ... #endif. Additionally, it is important to make sure that during tests and examples, your OpenMP code doesn't use more than two threads: https://cran.r-project.org/web/packages/policies.html This is in place because CRAN checks are run in parallel, and a package that tries to helpfully use all of the processor cores would interfere with other packages being checked at the same time. > [[alternative HTML version deleted]] This mailing list removes HTML e-mails. If you compose your messages in HTML, we only get the plain text version automatically prepared by your mailer: https://stat.ethz.ch/pipermail/r-package-devel/2024q1/010595.html In order to preserve the content and the presentation of your messages, it's best to compose them in plain text. -- Très cordialement, Ivan ______________________________________________ R-package-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-package-devel
