Hi Dirk and Romain,
Aparrently libR is not loaded by rpy2, at least not in a way such that Rcpp
can access it. I have solved the problem by adding -lR to the linker flags
when building Rcpp. Since for normal use of Rcpp from R this does not make a
difference, would you mind adding this to the Makevars file in a future
version of Rcpp? Or does this lead to problems in case R is build without
libR.so?
Best regards,
Jonas
---------- Forwarded message ----------
From: Jonas Rauch <jonas.ra...@googlemail.com>
Date: Fri, Aug 12, 2011 at 10:36 AM
Subject: Rcpp and rpy2
To: rcpp-devel <rcpp-de...@r-forge.wu-wien.ac.at>
Is Rcpp compatible with rpy2?
I would like to call a very complex R function from python. My function
depends on code implemented with Rcpp. When I try to load Rcpp from python
via
import rpy2.robjects as robjects
robjects.r('library(Rcpp)')
I get the following:
Error in dyn.load(file, DLLpath = DLLpath, ...) :
unable to load shared object
'/home/jonas/R/x86_64-unknown-linux-gnu-library/2.13/Rcpp/libs/Rcpp.so':
/home/jonas/R/x86_64-unknown-linux-gnu-library/2.13/Rcpp/libs/Rcpp.so:
undefined symbol: R_ClassSymbol
Error: package/namespace load failed for 'Rcpp'
Traceback (most recent call last):
File "RcppTest.py", line 2, in <module>
robjects.r('library(Rcpp)')
File
"/usr/local/lib/python2.7/dist-packages/rpy2-2.2.2dev_20110811-py2.7-linux-x86_64.egg/rpy2/robjects/__init__.py",
line 225, in __call__
res = self.eval(p)
File
"/usr/local/lib/python2.7/dist-packages/rpy2-2.2.2dev_20110811-py2.7-linux-x86_64.egg/rpy2/robjects/functions.py",
line 82, in __call__
return super(SignatureTranslatedFunction, self).__call__(*args,
**kwargs)
File
"/usr/local/lib/python2.7/dist-packages/rpy2-2.2.2dev_20110811-py2.7-linux-x86_64.egg/rpy2/robjects/functions.py",
line 34, in __call__
res = super(Function, self).__call__(*new_args, **new_kwargs)
rpy2.rinterface.RRuntimeError: Error: package/namespace load failed for
'Rcpp'
>From what I understand R_ClassSymbol is supplied by libR.so, which should by
loaded by rpy2 anyway in order to work at all, or am I totally wrong here?
Running python 2.7.1, rpy2-2.2.2, R 2.13.0
I would appreciate any help.
Regards,
Jonas
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