Thank you Dirk and Kevin, that was very helpful and
> sudo apt install libc++-dev libc++abi-dev did the job! Great, this was very important to me. Thanks again Jens On 13.09.20 02:55, Kevin Ushey wrote: > My understanding is that many Linux OSes package the clang compiler, the > libc++ standard library, and the headers used by the libc++ standard > library separately. To install those headers, you likely need (e.g. on > Ubuntu): > > sudo apt install libc++-dev libc++abi-dev > > to be able to build and compile programs against libc++. > > This also comes with the caveat that mixing programs built against > different standard library implementations is in general a bad idea, so > you may see issues if you mix libraries compiled with libstdc++ and > libc++ in the same R session. (This can come up with R packages that > link to other libraries installed on the system, which will typically be > built with and linked against the "default" system compiler + standard > library implementations.) I'm not sure if this will be an issue in > practice with what you're doing, but it's worth being aware of. > > Best, > Kevin > > On Sat, Sep 12, 2020 at 5:50 AM Dirk Eddelbuettel <e...@debian.org > <mailto:e...@debian.org>> wrote: > > > Hi Jens, > > On 11 September 2020 at 21:00, Dr. Jens Oehlschlägel wrote: > | I can compile a package under clang++ with -stdlib=libstdc++, but > with -stdlib=libc++ I get > | > | " > | In file included from > > /home/jo/R/x86_64-pc-linux-gnu-library/4.0/Rcpp/include/Rcpp/r/headers.h:67: > | > > /home/jo/R/x86_64-pc-linux-gnu-library/4.0/Rcpp/include/Rcpp/platform/compiler.h:100:10: > fatal error: 'cmath' file not found > | #include <cmath> > | ^~~~~~~ > | 1 error generated. > | " > | > | Is there any howto for using Rcpp with -stdlib=libc++ ? > > That has zero to do with Rcpp. You are lacking a C++ library header > when > switching the C++ standard library along with clang. Nothing that > Rcpp ships, > or governs, or selects. > > I am forgetting the fine details here (and someone may hopefully fill in > fuller details) but in short, "that is just the way it is". I think we > simply pivot back to the g++ standard C++ library even when using > clang++. > > Cheers from Chicago, Dirk > > | Greetings from Munich > | > | Jens Oehlschlägel > | > | > | P.S. > | > | Package Makevars > | CXX_STD = CXX17 > | PKG_CXXFLAGS=-O3 -march=native -pthread > | PKG_LIBS=-latomic -pthread > | > | ~.R/Makevars > | CXX17 = clang++ -stdlib=libc++ > | CXX17FLAGS = -fstack-protector-strong -D_FORTIFY_SOURCE=2 -g $(LTO) > | CXX17STD = -std=c++17 > | > | > packageVersion("Rcpp") > | [1] ‘1.0.5’ > | > | > version > | _ > | platform x86_64-pc-linux-gnu > | arch x86_64 > | os linux-gnu > | system x86_64, linux-gnu > | status > | major 4 > | minor 0.2 > | year 2020 > | month 06 > | day 22 > | svn rev 78730 > | language R > | version.string R version 4.0.2 (2020-06-22) > | nickname Taking Off Again > | > | ______________________________________________ > | R-package-devel@r-project.org > <mailto:R-package-devel@r-project.org> mailing list > | https://stat.ethz.ch/mailman/listinfo/r-package-devel > > -- > https://dirk.eddelbuettel.com | @eddelbuettel | e...@debian.org > <mailto:e...@debian.org> > > ______________________________________________ > R-package-devel@r-project.org <mailto: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
