2

OS:ubuntu I am able to install opencv-python from the command line. However,when I tried to install my self-built package with opencv-python dependencies, it failed to biuld:

Building wheels for collected packages: opencv-python
  Building wheel for opencv-python (PEP 517): started
  Building wheel for opencv-python (PEP 517): finished with status 'error'
  ERROR: Complete output from command /usr/local/bin/python /usr/local/lib/python3.6/site-packages/pip/_vendor/pep517/_in_process.py build_wheel /tmp/tmp7jntqv2r:
  ERROR: Not searching for unused variables given on the command line.
  CMake Error: CMake was unable to find a build program corresponding to "Ninja".  CMAKE_MAKE_PROGRAM is not set.  You probably need to select a different build tool.
  -- Configuring incomplete, errors occurred!
  See also "/tmp/pip-install-utbicth7/opencv-python/_cmake_test_compile/build/CMakeFiles/CMakeOutput.log".
  Not searching for unused variables given on the command line.
  CMake Error: CMake was unable to find a build program corresponding to "Unix Makefiles".  CMAKE_MAKE_PROGRAM is not set.  You probably need to select a different build tool.
  -- Configuring incomplete, errors occurred!
  See also "/tmp/pip-install-utbicth7/opencv-python/_cmake_test_compile/build/CMakeFiles/CMakeOutput.log".


-- Trying "Unix Makefiles" generator - failure
  --------------------------------------------------------------------------------
  
  ********************************************************************************
  scikit-build could not get a working generator for your system. Aborting build.
  
  Building Linux wheels for Python 3.6 requires a compiler (e.g gcc).
  It can be installed using debian package manager:
  
    sudo apt-get install build-essential
  
  To build compliant wheels, consider using the manylinux system described in PEP-513.
  Get it with "dockcross/manylinux-x64" docker image:
  
    https://github.com/dockcross/dockcross#readme
  
  For more details, please refer to scikit-build documentation:
  
    http://scikit-build.readthedocs.io/en/latest/generators.html#linux
  
  ********************************************************************************
  ----------------------------------------
  ERROR: Failed building wheel for opencv-python

I suspect issue is with scikit-build. I checked I have ninja, make/gcc all available. I set manually CMAKE_MAKE_PROGRAM=/usr/bin/make.

But still failed with same error. I

Improve this question
3
  • Did you install Ninja? Commented Aug 24, 2020 at 19:37
  • Thanks for quick comments Ahmet. yeah, I have ninja-build installed and I can run ninja from the terminal. Commented Aug 24, 2020 at 19:46
  • 1
    sudo apt-get install build-essential Commented Aug 24, 2020 at 19:51

3 Answers 3

Reset to default
7

You are missing dependencies. Please see this part of the error message you have provided above:

  Building Linux wheels for Python 3.6 requires a compiler (e.g gcc).
  It can be installed using debian package manager:
  
    sudo apt-get install build-essential

Therefore, please use apt-get to install the build tools required to build your package.

Improve this answer
Sign up to request clarification or add additional context in comments.

1 Comment

thanks for comments. build-essential was installed while having this problem :)
1

Finally figured out, when I installed locally I had a requirements with version 4.1.x and no issues. When I install with the dependencies, it fetches the latest version 4.4 and the issue is that 1) pip version is 19.1 and2) since 4.3 opencv, the wheels has been replaced.

Improve this answer

Comments

1

Run pip3 install -U pip before install opencv-python.

Improve this answer

Comments

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Start asking to get answers

Find the answer to your question by asking.

Ask question

Explore related questions

See similar questions with these tags.