How to compile program with opencv and qt for Yocto linux image?

Question

Using Yocto i am able to generate my Linux image and its root file system having libraries for both qt and opencv.

In order to compile QT program there is an SDK poky-eglibc-i686-meta-toolchain-qt5-cortexa15hf-vfp-neon-toolchain-1.6.1.sh .

For compiling Opencv i have another SDK: poky-eglibc-i686-core-image-weston-cortexa15hf-vfp-neon-toolchain-1.6.1.sh.

QT SDK doesnot have any libraries and header files for opencv which is making difficult to compile a program both with Opencv and QT.

I am successfully able to compile Qt programs and opencv programs using separate SDK.

Is there any SDK which can compile a program with both QT and Opencv? Or how should i generate one?

Anders · Accepted Answer · 2017-06-14 13:27:22Z

3

My preference is to create an image based SDK, ie an SDK that will match your image. This is done by running:

bitbake <your-image> -c populate_sdk

If your image includes a Qt5 application and OpenCV, both of those will automatically be installed into your new SDK. You should have the following line in your image recipe:

inherit populate_sdk_qt5

An alternative is to create your own SDK-recipe, by eg copying meta-toolchain-qt5 to your own layer and renaming it. Then add:

 TOOLCHAIN_TARGET_TASK_append = " opencv"

That should add opencv to your generic Qt5 SDK.

Again, my recommendation is to use the image based approach.

edited Jun 14, 2017 at 13:27

answered Jun 14, 2017 at 5:19

Anders

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2 Comments

Tomas Novotny Over a year ago

I'm also using image based approach. My image also contains inherit populate_sdk_qt5. This will pull some nativesdk qt tools and it will create qt.conf sdk file. I'm not sure if these things are somehow pulled in because of dependencies.

sumit Over a year ago

@TomasNovotny Thank you for your reply. i did the same thing inherit populate_sdk_qt5 and after that bitbake <your-image> -c populate_sdk. It worked.

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