[Rcpp-devel] loading failed

[Fabio Tordini]

Hi all,
I have a C++ application I developed, with its headers (.hpp) and 
related .cpp files. Within this project I use a templated header-only 
library for efficient parallel computing using pthreads, as well as the 
GSL library.
My intent is to use this application within a R package, and I use 
RStudio under GNU Linux to create an Rcpp package.

I created a c++ function with '[[Rcpp::export]]' attribute that includes 
headers of my project and wraps a sort of entry point to the 
application. Something like:

#include "cppApp.hpp"

// [[Rcpp::export]]
int wrapApp(Args...) {
     // set up parameters
     runParallelCppApp(Params...);
     return 0;
}

I carefully edited the DESCRIPTION file with lines

LinkingTo: Rcpp, RcppGSL
SystemRequirements: C++11

While the Makevars file contains:

PKG_CPPFLAGS = -DPRINTLOG -I"../inst/include" -pthread
PKG_LIBS = -lcurl -lpthread `$(R_HOME)/bin/Rscript -e \
"Rcpp:::LdFlags()"` $(R_HOME)/bin/Rscript -e "RcppGSL:::LdFlags()"`
CXX_STD = CXX11

Everything compiles fine, but then it fails when loading the package:

** testing if installed package can be loaded
Error in dyn.load(file, DLLpath = DLLpath, ...) :
   unable to load shared object 
'/home/fabio/R/x86_64-pc-linux-gnu-library/3.0/NgrapH/libs/NgrapH.so':
   /home/fabio/R/x86_64-pc-linux-gnu-library/3.0/NgrapH/libs/NgrapH.so: 
undefined symbol: _ZN6Finder10parseFilesESsSsSs
Error: loading failed

What could possibly be the problem?


Thanks in advance,
Fabio