Hello all. I'm developing a package for R holding a Gibbs sampler, which tends to have better performance when written in C than in R. During each iteration in the Gibbs sampler, I need the inverse of a symmetric matrix. For this, I wish to use lapack, as is concisely suggested in "Writing R extensions", since this will have better performance than I could ever write myself.
After some twiddling I have got my code to compile by including "R_ext/Lapack.h" and using "F77_CALL(dpotrf)", but unfortunately, I don't get this to link properly. I get this message: " testc.o:testc.c:(.text+0x255): undefined reference to `dpotrf_'" which seems logical to me as far as my understanding of C reaches, but I don't know how to resolve it. I'm quite sure I need some extra parameters in my makefile, but as I come from a world where all these complexities are happily abstracted away for me by an IDE, I have no actual clue on how to surmount this. However: when I'm done with all my code, I wish to build a package for publication on CRAN, so I want to be sure that not only I can build it on my system, but it will also work well when distributed to other computers (if I understand the package process well, source files are compiled and linked during installation of the package), so I would also like to know how to do this. It should not be relevant, but either way: I'm doing all this on a Windows 7 machine, though the package will probably be used on Linux-based servers eventually. Finally: I have found no comprehensive list of the functions available to an R package developer, nor, strangely, questions about that. Does such a thing exist, or are we up to hoping we find what we are looking for in the header files? If it does not exist already, I would surely be willing to work on it. Thanks for any input. Nick Sabbe -- ping: nick.sa...@ugent.be link: http://biomath.ugent.be wink: A1.056, Coupure Links 653, 9000 Gent ring: 09/264.59.36 -- Do Not Disapprove ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel