On 11 June 2020 at 19:13, Peter Crowther wrote: | It's done so that you can have multiple versions of the tools installed | side-by-side rather than being blindsided by upgrades breaking your | toolchain. This is rather the same justification that the Python community | uses for its similarly weird way of selecting from side-by-side Python | installations. | | As someone working to produce regulated environments (to ICH-GxP), this | makes sense to me. As someone who has to use both day-to-day, it's a royal | pain in the neck!
Well: edd@rob:~$ ls -ltr /usr/bin/g++-* /usr/bin/clang++-* lrwxrwxrwx 1 root root 27 May 3 2018 /usr/bin/clang++-4.0 -> ../lib/llvm-4.0/bin/clang++ lrwxrwxrwx 1 root root 25 Mar 19 03:50 /usr/bin/clang++-8 -> ../lib/llvm-8/bin/clang++ lrwxrwxrwx 1 root root 27 Mar 23 05:59 /usr/bin/clang++-6.0 -> ../lib/llvm-6.0/bin/clang++ lrwxrwxrwx 1 root root 25 Mar 23 05:59 /usr/bin/clang++-7 -> ../lib/llvm-7/bin/clang++ lrwxrwxrwx 1 root root 22 Mar 26 07:55 /usr/bin/g++-7 -> x86_64-linux-gnu-g++-7 lrwxrwxrwx 1 root root 25 Apr 1 10:23 /usr/bin/clang++-9 -> ../lib/llvm-9/bin/clang++ lrwxrwxrwx 1 root root 22 Apr 2 08:45 /usr/bin/g++-8 -> x86_64-linux-gnu-g++-8 lrwxrwxrwx 1 root root 22 Apr 9 05:38 /usr/bin/g++-9 -> x86_64-linux-gnu-g++-9 lrwxrwxrwx 1 root root 26 Apr 20 00:12 /usr/bin/clang++-10 -> ../lib/llvm-10/bin/clang++ edd@rob:~$ To use it I just switch a version variable in ~/.R/Makevars edd@rob:~$ grep VER .R/Makevars #VER=-4.9 VER= CC=$(CCACHE) gcc$(VER) CXX=$(CCACHE) g++$(VER) CXX11=$(CCACHE) g++$(VER) #-std=c++11 CXX14=$(CCACHE) g++$(VER) #-std=c++14 CXX17=$(CCACHE) g++$(VER) #-std=c++17 SHLIB_CXXLD=$(CCACHE) g++$(VER) edd@rob:~$ and and otherwise go with the default, currently g++-9.3. But hey, doesn't have "enterprise" in the name or "scientific" or ... But works. And is free. Dirk -- http://dirk.eddelbuettel.com | @eddelbuettel | e...@debian.org _______________________________________________ Rcpp-devel mailing list Rcpp-devel@lists.r-forge.r-project.org https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rcpp-devel
