On 7 October 2012 at 12:50, Davor Cubranic wrote: | On 12-10-06 11:14 AM, Dirk Eddelbuettel wrote: | > But we need to hear from OS X users with different clang++ versions, and | > possibly clang++ users on other Linux setups --- particularly with clang++ | > 2.* and 3.1. | > | > The test is easy: just do 'R CMD INSTALL Rcpp_0.9.14.2.tar.gz' and it will | > either build and exceptions.cpp finds its headers, or not. I would | > appreciate tests and reports back here greatly ... and I don't really want to | > mess with five more uploads. | | But isnt' it going to use whatever C++ R was configured to use?
Yes. If no CC and CXX is set, you get what you had a R's compile time. But if you set CC and CXX to other values as eg per (here still commented out) edd@max:~$ tail -4 .R/Makevars #CXX=clang++ #CC=clang #CXXFLAGS=-Wall -O3 #CdFLAGS=-Wall -O3 edd@max:~$ then those are used. As clang/clang++ are in fact interoperable with gcc/g++, this is a good option (eg for better error messages). | Typically, that's the one it was built with, and for the "official" R | binary on OS X, that would be "CXX=gcc". Which, depending on the version | of the OS, will be either gcc or gcc-llvm. If so, wouldn't one need to R | from source with clang as the C++ compiler in order to test this? No, sorry for not making that clearer. If you have another compile (be it icc or clang++) you can just drop it (on systems where drop-in compatibility works such as Linux and AFAIK also OS X). The issue with clang++ "simply" is that it doesn't (yet?) ship its headers, and exceptions_defines.h can be in a subdirectory so we had #ifdef's for this. Martin came up with a much better direct test for "is header present" offered by clang. So test away if you have clang++ around, and don't worry if you don't. Dirk -- Dirk Eddelbuettel | e...@debian.org | http://dirk.eddelbuettel.com _______________________________________________ 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
