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I got the results described above somewhere at midnight, and went to sleep with the good feeling of a job well-done.
j8 Building OpenCV for Other Python Versions If everything looks good, we’re ready to build: $ cmake -build. DPYTHON3_NUMPY_INCLUDE_DIRS=~/.local/lib/python3.8/site-packages/numpy/core/include \Ĭheck cmake’s output to make sure it lists the python3 module – it should be in the list of modules to be built. $ cmake -DPYTHON3_EXECUTABLE=$(pyenv which python3) \ Voilà, now let’s create a build directory and run cmake: $ mkdir opencv_build Users/xperience/.local/lib/python3.9/site-packages/numpy/core/include I/Users/xperience/.pyenv/versions/3.9.5/include/python3.9Īnd the last is our numpy include directory, which we get like so: $ python3 -c "import numpy print(numpy.get_include())" … and our Python installation provides an utility named python-config, that knows everything about libraries and include directories: $ python3-config -includes Users/xperience/.pyenv/versions/3.9.5/bin/python3
Pyenv itself can tell us where the binary is for Python, that’s one down: $ pyenv which python3 This presents a problem: Where can we find these paths, assuming we have a non-system python? (Don’t forget that if you’re doing this locally the paths can be different than those shown below.) Now, we should provide these 3 options to cmake to get python3 module built:
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First, we’ll set the active version of Python to 3.9.5, make sure pip is up to date, and then install the python packages needed for the build: $ pyenv local 3.9.5 I installed python 3.9 from pyenv – as easy as: $ pyenv install 3.9.5 After that, I started doing the build – not the Python package, initially, but OpenCV itself with the Python bindings. Starting in the evening, I opened my laptop, connected via ssh to the M1 machine, checked that all the tools were ready and cloned the OpenCV repository. Using the above tools, we have all we need to set up our requirements and move on to building. Using this Ansible collection that allows you to install any GUI application from Apple store we will set up XCode which is, of course, Apple’s recommended IDE. That said, having a compiler isn’t enough, we need an IDE. Let’s not forget we still may need some GUI applications – yes, this machine is for CI, but imagine that at some point you’d like to debug some functionality. Ansible is one of the most used tools in this area, and has a good track record, so we’ll go with it. On top of that, automation requires some glue between different tools to configure them, provide the needed setup, and report issues in standing up new machines.
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The free Homebrew is great third-party package manager for macOS which we’ll use for this purpose.
PYTHON MAC M1 CHIP SOFTWARE
Since we’re talking about automation, we need to be able to install software from the command-line to efficiently manage dependencies. My tool of choice when it comes to managing python interpreters on one machine is pyenv (yes, we know there are others). Since we want to support multiple Python versions, chances are we’ll have more machines in the future, so we’ll want to automate the environment setup. However, for our continuous integration machine, we need to do a few additional steps. I started with the official tutorial on building the current version of OpenCV for macOS.
PYTHON MAC M1 CHIP HOW TO
How to set up macOS for OpenCV development Grigory Serebryakov is OpenCV AI Chief Development Officer.
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