Greetings, Quick context, I have been working on developing a set of packages to make GPU computing as simple as possible with R. I have a functional package that works very nicely with OpenCL based code (gpuR - https://github.com/cdeterman/gpuR) but I also am building a companion CUDA backend package (gpuRcuda - https://github.com/cdeterman/gpuRcuda) which is stripped down to a single function at the moment to work out the compiling issue described below.
The problem is, CUDA requires me to use the NVCC compiler. So I cannot just rely on the magic of Rcpp, I need to create a Makevars file. I have done so and I am very close but I cannot get the shared object file to be created with NVCC. The individual files compile with NVCC just fine, the build script just keeps switching back to g++ for the shared object file. A quick excerpt from my build script ''' /usr/local/cuda-7.0/bin/nvcc -arch=sm_30 -Xcompiler -fPIC -Xcudafe --diag_suppress=boolean_controlling_expr_is_constant -I/usr/share/R/include -I/usr/include -I/home/cdeterman/R/x86_64-pc-linux-gnu-library/3.2/RViennaCL/include -I"/home/cdeterman/R/x86_64-pc-linux-gnu-library/3.2/RcppEigen/include" viennacl_sgemm.cu -c # NOW IT SWITCHES TO G++? ccache g++-4.8 -shared -L/usr/lib/R/lib -Wl,-Bsymbolic-functions -Wl,-z,relro -o gpuRcuda.so RcppExports.o viennacl_cudaMatrix_sgemm.o -L/usr/lib/R/lib -lR ''' You can see my current Makevars file here ( https://github.com/cdeterman/gpuRcuda/blob/master/src/Makevars). I have read in the 'Writing R Extensions' manual that this is possible with the OBJECTS macro ( http://cran.r-project.org/doc/manuals/r-release/R-exts.html#Creating-shared-objects) however I cannot figure out how to use it properly (and haven't been able to find an example). I have looked at the other packages on CRAN that also use CUDA (such as WideLM which I tried to emulate) but I can't seem to figure out why R keeps defaulting the shared library creation to g++. Perhaps my shared object section of my Makevars is incorrect? Any insights would be sincerely appreciated, Charles [[alternative HTML version deleted]] ______________________________________________ R-package-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-package-devel
