Hi,
Im using windows7, R2.12, Rtools2.12 and all the latest packages of inline,
rcpp, etc. Over the last few weeks I have managed to get loads of the examples
working, and all makes sense and is pretty clear. I had a couple of
questions/comments:
1. RTools: On windows, I understand that Rcpp and R depend in a critical way
upon RTools. I have recently been rewriting some parallelized C++ code that
uses omp.h and the RcppAramdillo plugin. Im also a fan of running code snippits
using inline, etc. RTools does not provide full suport for omp (no real
surprise given the "minimum"GW distribution). So I had to add libpthreads, etc,
to my RTools installation (libgomp is already included) and use "cppargs=
-fopenmp" and "libargs = -lgomp -lpthread" when using "cfunction" from inline.
All works fine though. Is it *only* the core R build process that determines
what RTools toolchain contains? Could this change with more usage of Rcpp (on
windows)? Duncan Murdoch who maintains RTools pointed me in the right
direction, to find this solution.
2. As far as I can tell the "cxxfunction" does not allow the passing of
*additional* PKG_CPPFLAGS and PKG_LIBS args explictly (these are set from "env
<- settings$env" with "do.call(Sys.setenv, env)" if a plugin is used). Is there
a cleaner way of passing compiler options/flags when using cxxfunction +
plugin? I do appreciate that plugins circumvent the need for such compiler
options, etc, and so I guess this is somewhat of a pathological example. Right
now, I'm using my own hacked version of cxxfunction to pass the additional
flags (in 1.) to get parallel code to compile (on windows).
3. Rcpp::sugar. I have been trying to replicate this R snippet using sugar, but
have not had much luck:
R> sapply(rep(3,100), runif)
This returns a column major matrix of size 3x10.
I tried (column assigment):
int N = as<int>(nn); //N=3
NumericMatrix hrcc;
for(int k=0; k<100; k++){
hrcc(_,k) = sapply(N, runif);}
But the compiler complains about runif being overloaded and not resolved. I
have checked for examples and docs and looked at the sugar unit tests also. Am
I doing something stupid? Do I need to specify runif more carefully? Am I using
or assiging NumericMatrix incorrectly?
Many thanks, chris
_______________________________________________
Rcpp-devel mailing list
[email protected]
https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rcpp-devel
