Hi Ivan,
On 29 July 2025 at 13:33, Ivan Krylov via R-package-devel wrote: | On Mon, 28 Jul 2025 06:45:06 -0500 | Dirk Eddelbuettel <e...@debian.org> wrote: | | > And I just validated it: removing that last line from DESCRIPTION | > removes the compilation time NOTE. | | This must be the culprit. The 00install.out file [1] shows -flto=8 being | used, which GCC documentation [2] describes as "use 8 threads for LTO": | | >> If you specify the optional n [in -flto=n], the optimization and | >> code generation done at link time is executed in parallel using n | >> parallel jobs by utilizing an installed make program. The | >> environment variable MAKE may be used to override the program used. | | I think this was set in the Makeconf on the machine running the | "gcc-san" special checks; I don't see anything in the package that | would set 8 threads in particular. R itself, when configured with | --enable-lto, only sets -flto, not -flto=8. That's good sleuthing, as usual. But note that my machine has no -flto=$N for some N but rather '-flto=auto' which also results in the NOTE. So an extra check may be needed to not issue the nag if LTO is used? Dirk | -- | Best regards, | Ivan | | [1] | https://win-builder.r-project.org/incoming_pretest/boostmath_1.0.1_20250727_090857/specialChecks/gcc-san/package/00install.out | | [2] | https://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html#index-flto | | ______________________________________________ | R-package-devel@r-project.org mailing list | https://stat.ethz.ch/mailman/listinfo/r-package-devel -- dirk.eddelbuettel.com | @eddelbuettel | e...@debian.org ______________________________________________ R-package-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-package-devel
