[Rcpp-devel] Conflict between RInside and OpenCV

[Dirk Eddelbuettel]

On 23 April 2010 at 21:46, Xavi de Blas wrote:
| Hello
| 
| I'm trying to call R from my C++ OpenCV software and I have problems at runtime.
| 
| This is rinside_sample6.cpp adapted:
| 
| -----
| #include <RInside.h>
| #include "opencv/cv.h"
| 
| int main(int argc, char **argv) {
|         CvFont font = cvFont( 1 );  //This breaks all
| 
|         try {
|                 RInside R(argc, argv);
|                 R["txt"] = "Hello, world!\n";
|                 R.parseEvalQ("cat(txt)");
| 
|         } catch(std::exception& ex) {
|                 std::cerr << "Exception caught: " << ex.what() << std::endl;
|         } catch(...) {
|                 std::cerr << "Unknown exception caught" << std::endl;
|         }
| 
|         exit(0);
| }
| -----
| 
| Compiled like this:
| 
| g++ -I/usr/local/include/opencv -I/usr/share/R/include
| -I/usr/local/lib/R/site-library/Rcpp/lib
| -I/usr/local/lib/R/site-library/RInside/lib -g -O2 -Wall  -s
| rinside_sample6.cpp  -L/usr/lib/R/lib -lR -lblas -llapack
| -L/usr/local/lib/R/site-library/Rcpp/lib -lRcpp
| -Wl,-rpath,/usr/local/lib/R/site-library/Rcpp/lib
| -L/usr/local/lib/R/site-library/RInside/lib -lRInside
| -Wl,-rpath,/usr/local/lib/R/site-library/RInside/lib -L/usr/local/lib
| -lhighgui -Wl,-rpath,/usr/local/lib -o rinside_sample6
| 
| Compilation works, but on execution don't:
| 
| $ ./rinside_sample6
| Error in readRDS(mapfile) : unknown input format
| Error: could not find function "attach"
| Exception caught: not found : .AutoloadEnv
| 
| Without the try {} catch{}, message is:
| $ ./rinside_sample6
| Error in readRDS(mapfile) : unknown input format
| Error: could not find function "attach"
| terminate called after throwing an instance of 'Rcpp::Environment::not_found'
|   what():  not found : .AutoloadEnv
| Aborted
| 
| 
| But if this line is removed:
| 
| CvFont font = cvFont( 1 );
| 
| Compilation works, and execution also:
| 
| xavier at corall:~/Desktop$ ./rinside_sample6
| Hello, world!
| 
| Installed packages:
| ---------------------------
| Rcpp: 0.7.12
| RInside: 0.2.2
| r-base                                         2.10.1-2karmic0
| r-base-core                                    2.10.1-2karmic0
| r-base-dev                                     2.10.1-2karmic0
| r-base-html                                    2.10.1-2karmic0
| $ uname -a
| Linux corall 2.6.33-020633-generic #020633
| 
| My OpenCV installation seems to be 2.0.0
| 
| 
| Any idea? Thanks in advance!

No idea whatsoever. That seems very bizarre and implausible.  Do you have
anything in your ~/.Profile?

Also, is  

      -L/usr/local/lib -lhighgui

all you need to link with OpenCV?  [ BTW the -L/usr/local/lib is redundant. ]

Also, that seems to be rinsinse_sample0, not 6, no?

Dirk

-- 
  Regards, Dirk