Dear Dirk, 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. -- 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
