Matthias, this has nothing to do with R, but rather your code. You have the wrong order of headers: the SWI headers mess up visibility macros, so you have to include them *after* Rcpp.h.
Cheers, Simon > On 9/10/2023, at 8:41 AM, Matthias Gondan <matthias-gon...@gmx.de> wrote: > > Dear developers and CRAN people, > > I get some linker warnings on the macOS build server, > > ld: warning: direct access in function '…' from file '…' to global weak > symbol '…' from file '…' means the weak symbol cannot be overridden at > runtime. This was likely caused by different translation units being compiled > with different visibility settings. > > Writing R Extensions (Section 6.16) says that visibility attributes are not > supported on macOS nor Windows. If I add $(CXX_VISIBILITY) to PKG_CXXFLAGS, > the warnings are still there, and I can see from the compiler log that the > flags do not have any effect on macOS. However, if I add -fvisibility=hidden > to PKG_CXXFLAGS, the warnings disappear (but I get a reminder from R CMD > check that -fvisibility=hidden is not portable). I am wondering if > $(CXX_VISIBILITY) could be supported on macOS. > > Best wishes, > > Matthias > > This is the build log of the package: > https://www.r-project.org/nosvn/R.check/r-release-macos-arm64/rswipl-00install.html > > > [[alternative HTML version deleted]] > > ______________________________________________ > R-package-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-package-devel > ______________________________________________ R-package-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-package-devel
