OpenCv 2.4.9 on iOS background_segm.hpp #include not found

Question

I'm trying to bridge OpenCV c++ to my Swift application.

And I'm getting this error:

Users/admin/Desktop/MDAcne/MDAcne/MDAcne-Bridging-Header.h:14:9: note: in file included from /Users/admin/Desktop/MDAcne/MDAcne/MDAcne-Bridging-Header.h:14:
#import "cvVideoWrapper.h"
        ^
/Users/admin/Desktop/MDAcne/MDAcne/cvVideoWrapper.h:13:9: note: in file included from /Users/admin/Desktop/MDAcne/MDAcne/cvVideoWrapper.h:13:
#import "algo.hpp"
        ^
/Users/admin/Desktop/MDAcne/MDAcne/algo.hpp:11:10: note: in file included from /Users/admin/Desktop/MDAcne/MDAcne/algo.hpp:11:
#include <opencv2/video/background_segm.hpp>
         ^
/Users/admin/Desktop/MDAcne/Pods/OpenCV/opencv2.framework/Headers/video/background_segm.hpp:47:10: error: 'list' file not found
#include <list>
         ^
<unknown>:0: error: failed to import bridging header '/Users/admin/Desktop/MDAcne/MDAcne/MDAcne-Bridging-Header.h'

cvVideoWrapper.h and cvVideoWrapper.mm connect between the bridging header to algo.hpp which is the c++ file. algo.hpp includes those libraries:

#include <opencv2/video/background_segm.hpp>
#include <opencv2/video/tracking.hpp>

which contains #include <list> which is a C file that is causing the problem as I understand.

I saw in another question that this can be fixed by changing the .m files to .mm files. I've done this and I still get this error. In addition seems that in my case it's happening in the cvVideoWrapper.h file.

How can this be fixed?

score 1 · Answer 1 · edited May 23 '17 at 12:18

1

#include <list>

is a C++ header, so you need to build with the obj-c++ compiler. Depending on your build environment, using the .mm suffix is often sufficient to invoke the obj-c++ compiler.

How are you building this? And what file is including

/Users/admin/Desktop/MDAcne/MDAcne/MDAcne-Bridging-Header.h

That file also needs a .mm suffix...

Edit: as discussed below, the user was trying to include obj-c++ directly from swift. This will not work:

Can I mix Swift with C++? Like the Objective - C .mm files

Use an obj-c++ wrapper and don't include the c++ headers from swift; nothing on the direct include chain can reference c++. So, move the:

#include <list>

to the cvVideoWrapper.mm file. You may have to re-architect things a bit.

edited May 23 '17 at 12:18

Community

1
1

answered May 25 '16 at 08:45

Joey Yandle

141
4

I'm building with libstdc++ . And MDAcne-Bridging-Header.h imports "cvVideoWrapper.h" – Oded Harth May 25 '16 at 08:59
Yes, but what imports MDAcne-Bridging-Header.h? – Joey Yandle May 25 '16 at 09:01
If for example you have a MDAcne-Bridging-Header.m, that file also needs the .mm suffix. – Joey Yandle May 25 '16 at 09:02
The bridging header connects to the Objective C with the Swift code. I don't have MDAcne-Bridging-Header.m / MDAcne-Bridging-Header.mm file, only the header. – Oded Harth May 25 '16 at 09:05
You can't include obj-c++ directly from swift. See http://stackoverflow.com/questions/24042774/can-i-mix-swift-with-c-like-the-objective-c-mm-files – Joey Yandle May 25 '16 at 09:08

Ozgur Sahin · Answer 2 · 2017-04-29T09:43:46.023

0

In my case, the problem was in the PrefixHeader file. After removing this import my problem is solved.

edited Apr 29 '17 at 09:43

answered Apr 29 '17 at 09:07

Ozgur Sahin

1,305
16
24

OpenCv 2.4.9 on iOS background_segm.hpp #include not found

2 Answers2