On 27 November 2017 at 21:24, Tan, Senren wrote: | I have been developing an R package using Rcpp to call C++ functions that use the C subroutine library 'fftw3' that implements fast Fourier transform algorithm. Since I have the C library 'fftw3' installed on my laptop (running MacOS), when I checked my developed package using R CMD CHECK --as-cran, I could pass all the checks with no errors or warnings. | | However, when I submitted the package to CRAN, during the pre-test, I encountered an error. I was wondering whether this error came from the absence of the 'fftw3' C library on the checking machine? Or maybe I have made some mistakes in the Makevars.win file? | | I have done some search on how to use the external C library in R packages with Rcpp. | | Here is what I have provided in the Makevars.win file: | | PKG_CPPFLAGS = -I$(LIB_FFTW)/include | CXX = g++ | PKG_CXXFLAGS = -std=c++11 | PKG_LIBS = -L$(LIB_FFTW)/lib -lfftw3 | | Could you please advise me on what to do?
Look at what other packages do. _Many_ packages deploy Rcpp to connect to other external packages. That is how Rcpp started: to connect to QuantLib. I also have packages connecting to the GSL, helped with one connecting to nlopt, was involved with one connecting to PostgreSQL and probably several more I now forget. Jeroen has probably a dozen more too (xml2, curl, poppler, v8, rmariadb, ... come to mind). Look around some more. I also think CRAN already _has_ packages interfacing the FFTW. Plus, you can of course connec to external libraries without using Rcpp. Lots of other packages do that too. Also read Writing R Extensions more carefully as the case is covered. The "bad" news is that you may need to learn to work with autoconf to create configure, or re-invent it in shell how Jeroen does it, or rely on pkg-config as I often, or ... do whatever it takes to _detect_ when fttw3 is not present. Dirk -- http://dirk.eddelbuettel.com | @eddelbuettel | e...@debian.org ______________________________________________ R-package-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-package-devel
