[Rcpp-devel] Problem with undefined symbols when building RcppArmadillo

Hi Katherine,

Thanks for posting here.

On 27 February 2012 at 17:23, Comanor, Katherine wrote:
| Hello Dirk,
| 
| I went through the thread at:
http://www.digipedia.pl/usenet/thread/14655/781/
| as I seem to be running into the same problem, but wasn't able to
determine a
| possible solution.
| 
| Basically, I'm trying to build R's RcppArmadillo, and although the
build does
| succeed, it has undefined symbols in the binary library file
RcppAramdillo.so
| which causes R's Forecast library, which depends on RcppArmadillo, not
to build

On OS X with g++ 4.2.1, I suspect?

| as a result of these undefined symbols.  I'm trying to build Forecast
3.16
| using RcppArmadillo 0.2.34 and Rcpp 0.9.9.
| 
| Here are the undefined symbols dealing with "version":
| 
| nm RcppArmadillo.so| grep -i version
| 000000000001022e t _GLOBAL__I_armadillo_version
|                  U _ZN4arma12arma_version5majorE
|                  U _ZN4arma12arma_version5minorE
|                  U _ZN4arma12arma_version5patchE

It is a known issue that confused us a little--and we don;t really run
this
platform--but thankfully Gershon Bialer sent us a patch. From ChangeLog:

 2011-12-29  Dirk Eddelbuettel  <edd at debian.org>

 	  * src/RcppArmadillo.cpp: Force instantiation of arma version vars
  which helps with older OS X compiler, as suggested by Gershon Bialer

and this is now in RcppArmadillo 0.2.35.  Please try that, which itself
will
need Rcpp 0.9.10.

Let us know how it goes.

Cheers, Dirk


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