Unable to build CVZ as 'opencv2/opencv.hpp' cannot be found

Question

Unable to build CVZ as 'opencv2/opencv.hpp' cannot be found

Closed this issue 9 years ago · 22 comments

I have installed opencv3.0.0 as instructed in the WYSIWYD readme. The opencv installation goes fine, but when I try to build WYSIWYD there will be the following error:
error C1083: Cannot open include file: 'opencv/opencv.hpp': No such file or directory

This is found in the projects cvxFiber, cvzCore, cvzHierarchyXmlBuilder and cvzStackExample. However in cvzVisualHierarchy, there were several other errors, mostly syntax, which is also strange.

I have already checked that the opencv_dir points to the newly built opencv3. Also, I have tried to shift the file opencv.hpp file manually into the opencv lib folder but that did not work either.

Has anyone any idea how this can be resolved?

Answer 1 · 2016-06-28T12:51:38.000Z

Try removing your build folder, and try again from scratch.
Please post the output of cat CMakeCache.txt | grep OpenCV

Answer 2 · 2016-06-28T13:00:52.000Z

I have removed the build folder and rebuilt it...several times. To the same result. And I'm using windows, so I'm not sure which file cat CMakeCache.txt | grep OpenCV should yield, but I have attached the CMakeCache.txt in opencv/build.
CMakeCache.txt

Answer 3 · 2016-06-28T13:03:16.000Z

I meant the CMakeCache.txt in wysiwyd/main/build .. (and removing the wysiwyd/main/build folder, not the opencv/build folder).
As it's Windows, I won't be able to help. Maybe @pattacini or @maxime-petit can have a look.

Answer 4 · 2016-06-28T13:04:50.000Z

This is the CMakeCache.txt in wysiwyd/main/build.

Answer 5 · 2016-06-28T13:25:26.000Z

I assume that this is due to not having OpenCV in the include_directories and target_link_libraries in the modules you mentioned, although they indirectly include opencv/opencv.hpp (they include cvz/gui/all.h which includes GuiNN.h which includes cvz/core/CvzNN.h which includes opencv2/opencv.hpp.

Can you remove #include <opencv2/opencv.hpp> from cvz/core/CvzNN.h and see whether it compiles?
Can you try adding ${OpenCV_INCLUDE_DIRS} and ${OpenCV_LIBRARIES} respectively in the CMakeLists.txt files of the modules you refer to, and see whether this solves the issue?

Answer 6 · 2016-06-28T13:58:11.000Z

It still doesn't work; I have attached one of the CMakeLists.txt (from cvzHierarchyXmlBuilder) for reference as to how I added the ${OpenCV_INCLUDE_DIRS} and ${OpenCV_LIBRARIES}.

CMakeLists.txt

Answer 7 · 2016-06-28T14:06:09.000Z

There is no reference to OpenCV in your CMakeLists.txt at all ..
Did you try solution 1)?
If this doesn't help, I'm afraid @pattacini or @maxime-petit have to kick in, as I have no clue about compiling on Windows.

Answer 8 · 2016-06-28T14:10:50.000Z

I added it into the include_directories of the CMakeLists.txt. Solution 1) did not help either :/ it's all very strange because I did manage to build it before. I thought it would be something that I changed, so I pulled the entire wysiwyd folder from github and tried to recompile from there but it still didn't work.

Answer 9 · 2016-06-28T14:23:15.000Z

Do you have the opencv.hpp file in C:/Users/sock/robotology/opencv/build/opencv2 ?

Answer 10 · 2016-06-28T14:35:12.000Z

No, it is in C:/Users/sock/robotology/opencv/include/opencv2. I did manually put it in build/opencv2 but that did not help either.

Answer 11 · 2016-06-28T14:43:22.000Z

Can you upload the (modified) CMakeLists.txt you are using? The uploaded version above is just the standard version without any modifications.

Answer 12 · 2016-06-28T14:53:05.000Z

Oups yes sorry :D C:/Users/sock/robotology/opencv/include/opencv2 is fine

Can you check also if you have another opencv directory installed? And check your variable environment (OpenCV_DIR and PATH).

I don't have opencv3 installed on my windows machines but I will take a look

Answer 13 · 2016-06-28T15:08:13.000Z

In my PATH I have included the directory C:\Users\sock\robotology\opencv\build\bin\Release, the OpenCV_DIR is C:\Users\sock\robotology\opencv\build. The uploaded CMakeLists.txt differs from the standard version in the include_directories portion where I had added the ${OpenCV_INCLUDE_DIRS} and ${OpenCV_LIBRARIES}.

Answer 14 · 2016-06-28T15:51:01.000Z

Hi guys,

Same as @Tobias-Fischer , I am not very skilled in Windows compilation :/
As a light contribution however:
@max says that "C:/Users/sock/robotology/opencv/include/opencv2 is fine" for cmake to find opencv.hpp. But from what I know the only path we provide to cmake is the build directory, so how could it find include/opencv2?

Answer 15 · 2016-06-28T16:25:16.000Z

Hmmm, sorry, I can't help in this case .. Out of ideas for remote Windows debugging ..

Answer 16 · 2016-06-28T16:32:50.000Z

There shouldn't be any difference in this case between Windows and Linux, as we're using cmake just for that purpose 😉 It must be a problem due to how opencv has been installed and/or how cvz might be in sync with latest opencv releases.

I cannot go through the compilation of cvz given that I don't have GTK2, which is a required dependency. I've got also a concern about cvz: it's a project per se which we don't use as far as I know and therefore I'd really suggest to hive it off from wysiwyd and provide it from a dedicated repository. Is there any plan to use it within wysiwyd?

I'm leaving to Leipzig and cannot help until next Tuesday.
However, I'm pretty confident you'll have sorted it out by then: it's just a matter of compiling code 😄

Getting shot of GTK2 might also help...

Answer 17 · 2016-06-28T16:40:00.000Z

@sockchinglow By the way, what's the output of git log -1? As a quick fix, you can set WYSIWYD_USE_GTK2 to OFF, it's only used by the cvz stuff.
@pattacini Happy to remove cvz as long as the guys at UPF are happy as well @jypuigbo @clement-moulin-frier - I agree it's a waste of time trying to get a module compiled we don't use.

Answer 18 · 2016-06-28T16:45:23.000Z

@Tobias-Fischer I think WYSIWYD_USE_GTK2 is an output variable, thus not used as input and therefore toggling it to OFF won't have any effect: it'll be overwritten with ON when checking for the availability of GTK2.

To disable cvz compilation @sockchinglow should comment out these lines:

Answer 19 · 2016-06-28T16:51:35.000Z

@sockchinglow can you compile just iol2opc to verify that the remaining modules are ok with your installation of opencv-3.0.0?

It that's the case, then it's very likely that cvz must be upgraded.
If iol2opc fails to compile, then your installation of opencv-3.0.0 could be wrong somehow.

Answer 20 · 2016-06-28T16:53:29.000Z

@pattacini
WYSIWYD_HAS_GTK2 is the output variable, as far as I know WYSIWYD_USE_GTK2 has the desired effect of being able to switch compilation off although the library is present.

Answer 21 · 2016-06-28T16:56:51.000Z

@Tobias-Fischer you're right, although I've bad memories of playing with those cmake vars.

Answer 22 · 2016-06-29T14:35:45.000Z

I managed to build the wysiwyd project after removing the cvz module! In addition to commenting the lines that @pattacini mentioned, I also "turned off" the variables WYSIWYD_USE_GTK2 and, just in case, ICUB_USE_GTK2.

Thanks for your help @Tobias-Fischer @pattacini @maxime-petit @clement-moulin-frier! Since we don't use the cvz module, I guess even though we still don't know what the issue is we can consider this issue resolved.