[Rcpp-devel] How to use external C++ libraries in R packages withRcpp.

[guxiaobo1982]

I tried this

## Use the R_HOME indirection to support installations of multiple R version
PKG_CPPFLAGS=-I/opt/boost_1_54_0/include -I../inst/include 
PKG_LIBS=-L/opt/boost_1_54_0/lib -lboost_regex `$(R_HOME)/bin/Rscript -e "Rcpp:::LdFlags()"`

and this:

 

## Use the R_HOME indirection to support installations of multiple R version
PKG_CPPFLAGS=-I/opt/boost_1_54_0/include -I../inst/include 
PKG_LIBS = -L/opt/boost_1_54_0/lib -lboost_regex `$(R_HOME)/bin/Rscript -e "Rcpp:::LdFlags()"`

 

Still got 

 

** testing if installed package can be loaded
Error in dyn.load(file, DLLpath = DLLpath, ...) : 
  unable to load shared object '/home/amber/R/x86_64-redhat-linux-gnu-library/3.0/cpptest/libs/cpptest.so':
  /home/amber/R/x86_64-redhat-linux-gnu-library/3.0/cpptest/libs/cpptest.so: undefined symbol: _ZTIN4Rcpp7RObjectE
Error: loading failed
Execution halted
ERROR: loading failed
* removing ‘/home/amber/R/x86_64-redhat-linux-gnu-library/3.0/cpptest’
* restoring previous ‘/home/amber/R/x86_64-redhat-linux-gnu-library/3.0/cpptest’

Exited with status 1.


 
 




------------------ Original ------------------
From:  "Dirk Eddelbuettel"<edd at debian.org>;
Date:  Sep 4, 2013
To:  "guxiaobo1982"<guxiaobo1982 at qq.com>; 
Cc:  "Dirk Eddelbuettel"<edd at debian.org>; "rcpp-devel"<rcpp-devel at lists.r-forge.r-project.org>; 
Subject:  Re: [Rcpp-devel] How to use external C++ libraries in R packages withRcpp.




On 4 September 2013 at 18:21, guxiaobo1982 wrote:
| Hi Dirk,
|  
| Thanks for you help, here is wha I got in a test package:
|  
| 1.Rcpp.package.skeleton("cpptest")

Good start!

| 2. Add the following line to Makevars
|  
| PKG_CPPFLAGS=-I/opt/boost_1_54_0/include -I../inst/include PKG_LIBS = -L/opt/
| boost_1_54_0/lib -lboost_regex `$(R_HOME)/bin/Rscript -e "Rcpp:::LdFlags()"`

Those have to be __two distinct lines__ not one glued together. Try

PKG_CPPFLAGS=-I/opt/boost_1_54_0/include -I../inst/include 
PKG_LIBS = -L/opt/boost_1_54_0/lib -lboost_regex `$(R_HOME)/bin/Rscript -e "Rcpp:::LdFlags()"`

ie one assignment each to two variables PKG_CPPFLAGS and PKG_LIBS.

| 3. Change  rcpp_hello_world.cpp to this:

Looks good, and should work.  Boost Regex use is a nice small example.

Dirk

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