error "OpenCV 4.x+ requires enabled C++11 support"

[liang-grape]

When I catkin_make,

the error "/usr/include/opencv4/opencv2/core/cvdef.h:690:4: error: #error "OpenCV 4.x+ requires enabled C++11 support" occurs. I have tried all ways I can search online, but I cannot solve the problem.

Could you give some advice?

Thank you

[fjlv520]

hello, I met the same issue, did u solve it?

[fjlv520]

Ok,I solve it. Modify the cvbridgeConfig.cmake file,change the SET_OPENCV_DIR to the path of opencv 3.x.x

[zeta0707]

Hi fjlv520,

I met same issue with Jetson Nano, image is Jetpack4.5.1.
OpenCV 4.1.1 is pre-installed here.
Do you install openCV3.x in parallel?

Thanks!

[fjlv520]

@zeta0707 Yes, I installed opencv3.4.1 additionally.

[zeta0707]

@fjlv520

I delete pre-installed opencv4.1.1, then installed opencv3.4.6 into /usr/local.
I also built successfully.

Thanks!

[iamrajee]

same issue!

[iamrajee]

I want to work with yolov4 with opencv4, leggedrobotics branch support opencv4 but not yolov4 and Tossy0423 branch support yolov4 but not opencv4.

[iamrajee]

@fjlv520

I delete pre-installed opencv4.1.1, then installed opencv3.4.6 into /usr/local. I also built successfully.

Thanks!

Could you eloborate the steps. I install the opencv 3.4.1 using pip, however I couldn't locate it in /usr/include. Additionally I couldn't even locate "SET_OPENCV_DIR". Instead I found the include path as below

Am I doing something wrong? (I'm on noetic)
I'm new to opencv, sorry for asking a silly doubt, Thanks for the help!

[fettahyildizz]

4.1 addi

Could you eloborate the steps, please? I am having the same issue.

[iamrajee]

@fettahyildizz I got it running by following the below steps. Just install OpenCV 3 and changed cvbridge opencv path.

[iamrajee]

@fettahyildizz
Here are the detailed steps:

Installing OpenCV 3.4.6 (along with previous '4.5.3')
https://learnopencv.com/install-opencv3-on-ubuntu/

cd /usr/include/

1. git clone https://github.com/opencv/opencv.git

2. cd opencv

3. git checkout 3.3.1

4. cd ..

5. git clone https://github.com/opencv/opencv_contrib.git

6. cd opencv_contrib

7. git checkout 3.3.1

8. cd ..

9. cd opencv

10. mkdir build

11. cd build

cmake -D CMAKE_BUILD_TYPE=RELEASE \
      -D CMAKE_INSTALL_PREFIX=/usr/local \
      -D INSTALL_C_EXAMPLES=ON \
      -D INSTALL_PYTHON_EXAMPLES=ON \
      -D WITH_TBB=ON \
      -D WITH_V4L=ON \
      -D WITH_QT=ON \
      -D WITH_OPENGL=ON \
      -D OPENCV_EXTRA_MODULES_PATH=../../opencv_contrib/modules \
      -D BUILD_EXAMPLES=ON ..

1. find out number of CPU cores in your machine

2. nproc

3. substitute 4 by output of nproc

4. make -j4
5. sudo make install
6. sudo sh -c 'echo "/usr/local/lib" >> /etc/ld.so.conf.d/opencv.conf'
7. sudo ldconfig

Now lets check if we can import previous version of opencv i.e 4.5.3

python3

import cv2
cv2.version
⇒ Should output '4.5.3', if not and give the below error

ImportError: ERROR: recursion is detected during loading of "cv2" binary extensions. Check OpenCV installation.

Then run this:
sudo pip3 install opencv-python --upgrade --force-reinstall

Now, Lets change opencv version in cv_bridge
cd /opt/ros/noetic/share/cv_bridge/cmake
code cv_bridgeConfig.cmake

[fettahyildizz]

@iamrajee wow you're a life saver. Thanks a lot for detailed explanations. I will try it on monday.

[fettahyildizz]

@iamrajee I will be using this package on Ros-Melodic therefore, I will run it on Python 2.7. I am going to change every "pip3" command to "pip" while following your steps.

[tandrewsnz]

A bit late but I found an easier fix was using
sudo apt -y --allow-downgrades install libopencv-dev=3.2.0+dfsg-4ubuntu0.1 to force downgrade my opencv version to 3.2 from 4.1. as mentioned here

[iamrajee]

Is there any way to get it work with OpenCV 4.x itself, like by adding -std=c++11 somewhere in CMakeLists.txt as suggest here(1, 2). I tried adding below lines, but none of them helped.

add_definitions(-std=c++11)
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_FLAGS "-std=c++11 ${CMAKE_CXX_FLAGS}")

What is the root problem here? Could somebody elaborate? Thank you!

[kyuhyong]

@iamrajee Did you solve the issue? I am having the same problem.
Installed opencv 3.4 on jetson nano.
Also running ros-melodic.

[kyuhyong]

After a while I revisited this issue and finally able to build and run on ROS noetic + CUDA 12.2 + opencv4+
You can checkout my forked version of darknet_ros as branch opencv4 and clone to your catkin workspace.
https://github.com/kyuhyong/yolov4-for-darknet_ros/tree/opencv4