Build failed while builidng opencv recipe!!

dtvs — Tue, 16 Jan 2018 05:03:16 GMT

(Target machine: Wandboard quad version c, Host machine Ubuntu 14.04,and using Yocto Jethro branch)

I am trying to compile the sample opencv code.
I have created a recipe following the instruction yocto manual.

Initially I have added all the libraries related to openCv
by referring the below link.

www.engcore.com/2014/02/building-opencv-2-4-x-for-freescales-imx6-bsp-yocto
Then i gave bitbake core-image-x11.
I was able to build successfully.

(I verified the building of the cpp file by creating a simple .cpp file, It compiled correctly)

Next, I created a recipe and added the .cpp code related to opencv.Changed the recipe.bb file to compile .cpp file.

I am not able to compile the recipe .
Please let me know the steps followed are correct or not.

Below is the error.
In `main':
| helloworld.cpp:(.text+0x68): undefined reference to `cv::VideoCapture::VideoCapture()'

Any additional library i need to include in the .bb file while building receipe?

Below is the source code used for building!!!

#include <stdio.h>
#include <opencv2/opencv.hpp>
#include <iostream>
int main(int, char**) {    
cv::VideoCapture vcap;    
cv::Mat image;     // This works on a D-Link CDS-932L    
const std::string videoStreamAddress = "http://<username:password>@<ip_address>/video.cgi?.mjpg";     //open the video stream and make sure it's opened    
if(!vcap.open(videoStreamAddress)) {        
std::cout << "Error opening video stream or file" << std::endl;        
 return -1;    
 }     
 for(;;) 
 {        
 if(!vcap.read(image)) {            
 std::cout << "No frame" << std::endl;            
 cv::waitKey();        
 }        
 cv::imshow("Output Window", image);        
 if(cv::waitKey(1) >= 0) 
 break;    
 }   
}

Re: Build failed while builidng opencv recipe!!

igorpadykov — Tue, 16 Jan 2018 06:36:53 GMT

Hi harsh

for opencv one can follow guidelines provided on

OpenCV support for i.MX6 Capture Drivers

Also if this is specific for wandboard issue it may posted on

meta-fsl-arm mailing list, so that someone familiar with that board could try

to assist you.
https://lists.yoctoproject.org/listinfo/meta-freescale

Best regards
igor
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Build failed while builidng opencv recipe!!

Re: Build failed while builidng opencv recipe!!