[Rcpp-devel] Unable to load shared object

[Dirk Eddelbuettel]

On 12 July 2013 at 21:35, Jules Archer wrote:
| Krzysztof,
| 
| Thank you very much for your helpful reply.
| 
| Along with your suggestions, I was finally able to track down the problem. As
| it turned out, I was (incorrectly) re-defining PKG_LIBS instead of adding to
| the already existing 
| PKG_LIBS = `$(R_HOME)/bin/Rscript -e "Rcpp:::LdFlags()"` in the Makevars file.
| With this fix, the binary package build is successful.

Yup, that'll do it.  And again, there are many Rcpp-based packages linking to
external libraries so there is always a stanza to copy from.
 
| Thanks again to you and Dirk for your help!

Glad it works for you. Looking forward to your package.

Dirk
 
| -------------------------------------------------------------------------------
| From: Krzysztof Sakrejda <krzysztof.sakrejda at gmail.com>
| To: Jules Archer <jules.archer at ymail.com>
| Cc: Dirk Eddelbuettel <edd at debian.org>;
| "rcpp-devel at lists.r-forge.r-project.org"
| <rcpp-devel at lists.r-forge.r-project.org>
| Sent: Wednesday, July 10, 2013 11:36 AM
| Subject: Re: [Rcpp-devel] Unable to load shared object
| 
| On Wed, Jul 10, 2013 at 2:18 PM, Jules Archer <jules.archer at ymail.com> wrote:
| 
| > | However, when I try to compile as an R package, I keep getting the
| > following
| > | error:
| > |
| > | ** building package indices
| > | ** testing if installed package can be loaded
| > | Error in dyn.load(file, DLLpath = DLLpath, ...) :
| > |  unable to load shared object '/usr/local/lib/R/site-library/mathGL/libs/
| > | mathGL.so':
| > |  /usr/local/lib/R/site-library/mathGL/libs/mathGL.so: undefined symbol:
| > | _ZTIN4Rcpp14not_compatibleE
| 
| I don't have an immediate answer, but calling c++filt gets you:
| 
| ~ $ c++filt _ZTIN4Rcpp14not_compatibleE
| typeinfo for Rcpp::not_compatible
| 
| I get more helpful error messages when I add "-Wl,-z,defs" to the gcc
| flags when building the library.  With those flags, the error comes up
| at compilation.  The proximate cause of the error is that it can't
| find the Rcpp::not_compatible exception class... the next clue you
| need is probably to look at the lines of output where your library is
| actually being compiled to see how Rcpp is being included, that's the
| part that's failing. Sorry if this is all obvious, I can't tell from
| your post where you're at with the Rcpp/C++ combo.
| 
| Hope that helps,
| 
| Krzysztof
| 
| 
| --
| 
| Krzysztof Sakrejda
| 
| Organismic and Evolutionary Biology
| University of Massachusetts, Amherst
| 319 Morrill Science Center South
| 611 N. Pleasant Street
| Amherst, MA 01003
| 
| work #: 413-325-6555
| email: sakrejda at cns.umass.edu
| -----------------------------------------------
| 
| 

-- 
Dirk Eddelbuettel | edd at debian.org | http://dirk.eddelbuettel.com