[Rcpp-devel] Conflict between RInside and OpenCV

| 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

Hello Dirk

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

Nothing special

Also, is

? ? ?-L/usr/local/lib -lhighgui

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

I  normally use this:

g++ `pkg-config --cflags opencv` kneeAngle.cpp -o kneeAngle
`pkg-config --libs opencv`

that means:

-L/usr/local/lib -lcxcore -lcv -lhighgui -lcvaux -lml

but for this small sample, there's enought with lhighgui

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

Yes sorry, i confused trying to send minimal code possible. Is sample 0

Maybe I update Ubuntu system, reinstall OpenCV.... but just prefer to
wait if there are some ideas

I've been all the day trying different compile options and reducing
code, and I feel so unhappy. Thanks for your fast response

| Hello Dirk
| 
| 
| > No idea whatsoever. That seems very bizarre and implausible. ?Do you have
| > anything in your ~/.Profile?
| 
| Nothing special

It is either that file, or an existing .RData you are loading by virtue of
initializing R.

I can run your example without a problem on an Ubuntu 9.10 box using
libhighgui-dev and all it dependents.  

I used RInside from SVN, but that shouldn't matter.  On the machine where I
tested this Rcpp is reasonably current but less recent than 0.7.12.

| >
| > Also, is
| >
| > ? ? ?-L/usr/local/lib -lhighgui
| >
| > all you need to link with OpenCV? ?[ BTW the -L/usr/local/lib is redundant. ]
| 
| 
| I  normally use this:
| 
| g++ `pkg-config --cflags opencv` kneeAngle.cpp -o kneeAngle
| `pkg-config --libs opencv`
| 
| that means:
| 
| -L/usr/local/lib -lcxcore -lcv -lhighgui -lcvaux -lml
| 
| but for this small sample, there's enought with lhighgui

Agreed. 

I just inserted -lhighgui right after -llapack, and it links and runs.  So no
bug here with RInside.

| > Also, that seems to be rinsinse_sample0, not 6, no?
| 
| 
| Yes sorry, i confused trying to send minimal code possible. Is sample 0
| 
| Maybe I update Ubuntu system, reinstall OpenCV.... but just prefer to
| wait if there are some ideas
| 
| I've been all the day trying different compile options and reducing
| code, and I feel so unhappy. Thanks for your fast response

You created a side-effect. Only you can figure out what you did or what you
have in .RData or .Rprofile or related files.  

There is no problem with your simple test file.

Regards, Dirk

Hello again

I deleted .RData and .Rprofile and problem persists.

In order to have OpenCV right-working with last ffmpeg i have so much
versions and compilations and maybe there's a problem difficult to
reproduce.

Can you please post your compilation line?

I'm glad that it's working for you

Thanks



2010/4/23 Dirk Eddelbuettel <edd at debian.org>:

On 23 April 2010 at 22:25, Xavi de Blas wrote:
| Hello Dirk
|
|
| > No idea whatsoever. That seems very bizarre and implausible. ?Do you have
| > anything in your ~/.Profile?
|
| Nothing special

It is either that file, or an existing .RData you are loading by virtue of
initializing R.

I can run your example without a problem on an Ubuntu 9.10 box using
libhighgui-dev and all it dependents.

I used RInside from SVN, but that shouldn't matter. ?On the machine where I
tested this Rcpp is reasonably current but less recent than 0.7.12.

| >
| > Also, is
| >
| > ? ? ?-L/usr/local/lib -lhighgui
| >
| > all you need to link with OpenCV? ?[ BTW the -L/usr/local/lib is redundant. ]
|
|
| I ?normally use this:
|
| g++ `pkg-config --cflags opencv` kneeAngle.cpp -o kneeAngle
| `pkg-config --libs opencv`
|
| that means:
|
| -L/usr/local/lib -lcxcore -lcv -lhighgui -lcvaux -lml
|
| but for this small sample, there's enought with lhighgui

Agreed.

I just inserted -lhighgui right after -llapack, and it links and runs. ?So no
bug here with RInside.

| > Also, that seems to be rinsinse_sample0, not 6, no?
|
|
| Yes sorry, i confused trying to send minimal code possible. Is sample 0
|
| Maybe I update Ubuntu system, reinstall OpenCV.... but just prefer to
| wait if there are some ideas
|
| I've been all the day trying different compile options and reducing
| code, and I feel so unhappy. Thanks for your fast response

You created a side-effect. Only you can figure out what you did or what you
have in .RData or .Rprofile or related files.

There is no problem with your simple test file.

--
?Regards, Dirk