linking other C++ libraries
On Thu, 26 Feb 2004, Sundar Dorai-Raj wrote:
Samuel Kemp wrote:
Hi,
I have written a little C++ program, which uses a third party library
called ANN (approximate nearest neighbours)....
#include "/home/sekemp/ann_0.2/include/ANN/ANN.h"
I have tried R CMD SHLIB ann.h myProgram.cc, although this compiles when
I load it into R I get the following message..
dyn.load("/home/sekemp/ann_0.2/ann.so")
Error in dyn.load(x, as.logical(local), as.logical(now)) :
unable to load shared library "/home/sekemp/ann_0.2/GammaTest.so":
/home/sekemp/ann_0.2/GammaTest.so: undefined symbol:
_ZN10ANNkd_treeC1EPPdiii12ANNsplitRule
I get the same error when I dyn.load the myProgram.so aswell.
There is nothing wrong with the ann library as I have used it directly
in C++ using the compiler-linker thingy....
g++ myProgram.cc -I/home/sekemp/ann_0.2/include
-L/home/sekemp/ann_0.2/lib -lANN
Does anyone have any ideas?
Looks like C++ name mangling. Did you wrap your code in extern "C" {}?
Yes, but there is a missing library with the mangled symbol (which contains `ANN'). It needs to be R CMD SHLIB ann.h myProgram.cc -L/home/sekemp/ann_0.2/lib -lANN I believe, if the .h file really is to be compiled ....
Brian D. Ripley, ripley at stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595