On 4 September 2013 at 18:51, Simon Zehnder wrote:
| Dear Rcpp::Users, Rcpp::Devels,
|
| I am following the ongoing discussion 'How to use external C++ libraries in R
packages withRcpp' (Makevars are still one of my weaknesses) and I have a
related question.
|
| I am trying to use the C++ optimization library nlopt
(http://ab-initio.mit.edu/wiki/index.php/NLopt) in my package that is based on
RcppArmadillo. In a first step I installed nlopt in a subfolder of the 'src'
folder of my package structure (so I have '/src/nlopt-2.3'). Second, I included
the header file into my source file right below '#include <RcppArmadillo.h>'.
Then I set my Makevars file to:
|
| ## Use the R_HOME indirection to support installations of multiple R version
| NLOPT_VERSION = 2.3
|
| NLOPT_LIBS = -lm nlopt-${NLOPT_VERSION}/lib/libnlopt_cxx.a
|
| NLOPT_INCL = -I./nlopt-${NLOPT_VERSION}/include
|
| PKG_CPPFLAGS = ${NLOPT_INCL}
| PKG_CFLAGS = -pipe ${NLOPT_INCL}
| PKG_LIBS = `$(R_HOME)/bin/Rscript -e "Rcpp:::LdFlags()"` ${NLOPT_LIBS}
|
| Calling 'R CMD INSTALL packageName' compiles without errors but produces the
well-known error during loading the shared library:
|
| Error in dyn.load(file, DLLpath = DLLpath, ...) :
| unable to load shared object
'/Library/Frameworks/R.framework/Versions/3.0/Resources/library/finmix/libs/finmix.so':
|
dlopen(/Library/Frameworks/R.framework/Versions/3.0/Resources/library/finmix/libs/finmix.so,
6): Symbol not found: __ZNSt8__detail15_List_node_base11_M_transferEPS0_S1_
Briefly:
i) Please show the actual linking step.
ii) Mixing shared and static is a bit messy, but I have done it too I
think. You may want to try _an absolute path_ to the .a library,
and a different link position, eg place ${NLOPT_LIBS} first.
This is definitely doable.
Dirk
| I find the missing symbol (using 'nm -A libnlopt_cxx.a | grep "transfer"' on
the shell) in the static library of nlopt (libnlopt_cxx.a) to which I link in
the Makevars, but I do not know yet, how I have to modify the Makevars to
include also the static library of nlopt into the shared library of my package.
Does anyone have a suggestion how to do it?
|
|
| Best
|
| Simon
|
|
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--
Dirk Eddelbuettel | [email protected] | http://dirk.eddelbuettel.com
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