Opencv_contrib: error: ‘nullptr’ was not declared in this scope

[FlorenceCa]

Hi, when I build OpenCV with the module contrib I got the following mistake : error: ‘nullptr’ was not declared in this scope (see below for details).

If someone has and idea that would be very helpful.
Thanks

[ 79%] Generating test_precomp.hpp.gch/opencv_test_cvv_RELEASE.gch
In file included from /net/rmc-lx0075/home_local/OpenCV_Contrib/opencv_contrib-master/modules/cvv/include/opencv2/cvv.hpp:19:0,
                 from /home_local/OpenCV_Contrib/opencv-3.1.0/build/modules/cvv/test_precomp.hpp:15:
/net/rmc-lx0075/home_local/OpenCV_Contrib/opencv_contrib-master/modules/cvv/include/opencv2/cvv/call_meta_data.hpp: In constructor ‘cvv::impl::CallMetaData::CallMetaData()’:
/net/rmc-lx0075/home_local/OpenCV_Contrib/opencv_contrib-master/modules/cvv/include/opencv2/cvv/call_meta_data.hpp:27:13: error: ‘nullptr’ was not declared in this scope
      : file(nullptr), line(0), function(nullptr), isKnown(false)
             ^
In file included from /net/rmc-lx0075/home_local/OpenCV_Contrib/opencv_contrib-master/modules/cvv/include/opencv2/cvv.hpp:21:0,
                 from /home_local/OpenCV_Contrib/opencv-3.1.0/build/modules/cvv/test_precomp.hpp:15:
/net/rmc-lx0075/home_local/OpenCV_Contrib/opencv_contrib-master/modules/cvv/include/opencv2/cvv/dmatch.hpp: At global scope:
/net/rmc-lx0075/home_local/OpenCV_Contrib/opencv_contrib-master/modules/cvv/include/opencv2/cvv/dmatch.hpp:83:47: error: ‘nullptr’ was not declared in this scope
                                const char * = nullptr, const char * = nullptr,
                                               ^
/net/rmc-lx0075/home_local/OpenCV_Contrib/opencv_contrib-master/modules/cvv/include/opencv2/cvv/dmatch.hpp:83:71: error: ‘nullptr’ was not declared in this scope
                                const char * = nullptr, const char * = nullptr,
                                                                       ^
In file included from /net/rmc-lx0075/home_local/OpenCV_Contrib/opencv_contrib-master/modules/cvv/include/opencv2/cvv.hpp:22:0,
                 from /home_local/OpenCV_Contrib/opencv-3.1.0/build/modules/cvv/test_precomp.hpp:15:
/net/rmc-lx0075/home_local/OpenCV_Contrib/opencv_contrib-master/modules/cvv/include/opencv2/cvv/filter.hpp:61:47: error: ‘nullptr’ was not declared in this scope
                                const char * = nullptr, const char * = nullptr)
                                               ^
/net/rmc-lx0075/home_local/OpenCV_Contrib/opencv_contrib-master/modules/cvv/include/opencv2/cvv/filter.hpp:61:71: error: ‘nullptr’ was not declared in this scope
                                const char * = nullptr, const char * = nullptr)
                                                                       ^
In file included from /net/rmc-lx0075/home_local/OpenCV_Contrib/opencv_contrib-master/modules/cvv/include/opencv2/cvv.hpp:24:0,
                 from /home_local/OpenCV_Contrib/opencv-3.1.0/build/modules/cvv/test_precomp.hpp:15:
/net/rmc-lx0075/home_local/OpenCV_Contrib/opencv_contrib-master/modules/cvv/include/opencv2/cvv/show_image.hpp:62:45: error: ‘nullptr’ was not declared in this scope
                              const char * = nullptr, const char * = nullptr)
                                             ^
/net/rmc-lx0075/home_local/OpenCV_Contrib/opencv_contrib-master/modules/cvv/include/opencv2/cvv/show_image.hpp:62:69: error: ‘nullptr’ was not declared in this scope
                              const char * = nullptr, const char * = nullptr)
                                                                     ^
modules/cvv/CMakeFiles/pch_Generate_opencv_test_cvv.dir/build.make:62: recipe for target 'modules/cvv/test_precomp.hpp.gch/opencv_test_cvv_RELEASE.gch' failed
make[2]: *** [modules/cvv/test_precomp.hpp.gch/opencv_test_cvv_RELEASE.gch] Error 1
CMakeFiles/Makefile2:11757: recipe for target 'modules/cvv/CMakeFiles/pch_Generate_opencv_test_cvv.dir/all' failed
make[1]: *** [modules/cvv/CMakeFiles/pch_Generate_opencv_test_cvv.dir/all] Error 2
Makefile:149: recipe for target 'all' failed
make: *** [all] Error 2

[berak]

would you be so kind and replace the screenshot with a text version of your errors ?

[FlorenceCa]

Done ! (but it is ugly, I don´t know how to make it more readable...)

[Dikay900]

its ok like this dont worry.
If you want to continue your build you can disable the cvv module with cmake for now.

[FlorenceCa]

How can I do that ?
With this -DCVV_DEBUG_MODE=OFF ?

[Dikay900]

should be
-DBUILD_opencv_cvv=OFF
unfortunately i cannot confirm this since i dont have access to cmake right now but try it

[FlorenceCa]

I just try and I have the same problem

[alalek]

It is case sensitive, use -DBUILD_opencv_cvv=OFF

[FlorenceCa]

Hi again,
Thank you for the answers, but I just tried once more, and I have the same issue, but I have the feeling that cvv module is not disable (during the make I still haveScanning dependencies of target opencv_cvv )

[ttsesm]

I get this error as well. Disabling cvv for the moment seems to work.

[FlorenceCa]

But how did you disable cvv ? with -DBUILD_OPENCV_CVV=OFF ? Because I did this and it doesn´t change anything, like cvv was not disabled at all...

[ttsesm]

@FlorenceCa yes, but as @alalek pointed out it is case sensitive. Therefore, it is not _-DBUILD_OPENCV_CVV=OFF_ but -DBUILD_opencv_cvv=OFF

[Dikay900]

changed my post accordingly in case someone else is stumbling over this thread

[FlorenceCa]

Oh ok now the installation works !!!
Thanks a lot !

[ttsesm]

I think you should reopen this issue since, this solution is a workaround but not an actual solution ;-). cvv module still has the problem, so until someone fixes that I think that it needs to be open.

[ttsesm]

:+1:

[mshabunin]

Please, check whether the fix from #671 works for you.

[FlorenceCa]

Yes it works !
Thank you very much.