CMake在构建OpenCV时找不到PythonLib

Question

so Im trying to cross-compile OpenCV for an arm device and while running cmake, I noticed in the output that the PythonLibs were not found. I have both Python2 and Python3 libs installed in my system.

Here is the output

-- Found PythonInterp: /usr/bin/python2.7 (found suitable version "2.7.12", minimum required is "2.7")

-- Could NOT find PythonLibs (missing: PYTHON_LIBRARIES PYTHON_INCLUDE_DIRS) (Required is exact version "2.7.12")

-- Found PythonInterp: /usr/bin/python3 (found suitable version "3.5.2", minimum required is "3.4")

-- Could NOT find PythonLibs (missing: PYTHON_LIBRARIES PYTHON_INCLUDE_DIRS) (Required is exact version "3.5.2")

Towards the end of the output, I also noticed this

Python 2:

Interpreter: /usr/bin/python2.7 (ver 2.7.12)

Python 3:

Interpreter: /usr/bin/python3 (ver 3.5.2)

Python (for build): /usr/bin/python2.7

From this I could conclude that the Python bindings were not built. If someone had any suggestion on how I can fix this, I would be happy to listen.

Answer 1

You are trying to compile something that is simple requesting the DEV packages, you have only the Python interpreters packages, in Raspberry PI you must have python-dev and python3-dev for example, if you are using Raspberry PI try to run:

sudo apt-get install -y python-dev python3-dev

Then you will pass this step, if there come another errors make new posts.

A good and simple tutorial on how to compile OpenCV for Raspberry PI you found here: https://www.pyimagesearch.com/2016/04/18/install-guide-raspberry-pi-3-raspbian-jessie-opencv-3/