[Rcpp-devel] Rcpp version of DATAPTR

[Dirk Eddelbuettel]

On 11 April 2012 at 15:32, Whit Armstrong wrote:
| Thanks, Dirk.
| 
| one more quick q.
| 
| Should I be doing something to prevent these warnings:
| 
| /usr/local/lib/R/site-library/RcppArmadillo/include/RcppArmadilloConfig.h:64:0:
| warning: "ARMA_DEFAULT_OSTREAM" redefined [enabled by default]
| /usr/local/lib/R/site-library/RcppArmadillo/include/armadillo_bits/config.hpp:73:0:
| note: this is the location of the previous definition
| 
| Or is this the intended effect of remapping std::cout to Rout?

That very much looks like either a very outdated version where Conrad's
definition is not #ifndef protected.  His (in config.hpp) should be

#if !defined(ARMA_DEFAULT_OSTREAM)
  #define ARMA_DEFAULT_OSTREAM std::cout
#endif

which it has been for a few releases.

Or you are including header files by force a second time, which we recommend
not to.  We recommend a single '#include <RcppArmadillo.h>' with which
everything is fine.   If you do include both, and in the wrong order, then
you are, as they say, on your own...

Dirk

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