[Rcpp-devel] Why would sourceCpp using both clang and gcc?

[Thell Fowler]

Thanks Dirk; that's the ticket.


On Fri, Nov 30, 2012 at 6:40 PM, Dirk Eddelbuettel <edd at debian.org> wrote:

>
> On 30 November 2012 at 17:16, Thell Fowler wrote:
> | Ubuntu precise with clang 3.3 and gcc 4.6.3 with R 2.15.2 and Rcpp
> 0.10.1 when
> | calling sourceCpp gives output I'm not quite understanding...
> |
> | >
> sourceCpp("~/src/TestPackageDepends2/inst/examples/CallFunction.cpp",verbose=
> | T, rebuild=T)
> |
> | Generated Rcpp module declaration:
> | --------------------------------------------------------
> |
> | #include <Rcpp.h>
> | RCPP_MODULE(sourceCpp_12634) {
> |     Rcpp::function("callFunction", &callFunction, Rcpp::List::create());
> | }
> |
> | Building shared library
> | --------------------------------------------------------
> |
> | DIR: /tmp/RtmpWMdYuo/sourcecpp_6275273d958b
> |
> | /usr/lib/R/bin/R CMD SHLIB -o 'sourceCpp_12634.so' --preclean
> | 'CallFunction.cpp'
> | "clang++" -I/usr/share/R/include -DNDEBUG
>  -I"/home/thell/R/library/Rcpp/
> | include" -I"/home/thell/R/library/TestPackageDepends/include"   -fpic
>  -O3
> | -pipe  -g  -c CallFunction.cpp -o CallFunction.o
> | g++ -shared -o sourceCpp_12634.so CallFunction.o
> -L/home/thell/R/library/Rcpp/
> | lib -lRcpp -Wl,-rpath,/home/thell/R/library/Rcpp/lib -L/usr/lib/R/lib -lR
> |
> |
> | What would make clang _not_ get used for both phases?  My Makevars shows
> |
> | CC="clang"
> | CXX="clang++"
> | CPP="clang-cpp"
>
> Because the last step is the _linking_ step and perusing the source (been
> there, done that) leads to setting this at the end of my ~/.R/Makevars :
>
>   VER=4.6
>   CC=ccache gcc-$(VER)
>   CXX=ccache g++-$(VER)
>   SHLIB_CXXLD=g++-$(VER)      ## <-    this one
>   FC=ccache gfortran
>   F77=ccache gfortran
>   MAKE=make -j8
>
>   #CXX=clang++
>   #CC=clang
>   #CXXFLAGS=-Wall -O3
>
>
> By the way, you can also drop the quotes.
>
> Dirk
>
> --
> Dirk Eddelbuettel | edd at debian.org | http://dirk.eddelbuettel.com
>



-- 
Sincerely,
Thell
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