matplotlib recipe

[tcaduser]

Resolves issue #712 and issue #857

Successfully builds matplotlib and its dependency kiwisolver. Leverages existing recipes for numpy, freetype, etc.

Takes care of all known duplicate symbol issues. Meets pep8 requirements.

To build:

python3 -mvenv venv
source venv/bin/activate
cd kivy-ios
pip install -e .
toolchain build matplotlib

screenshot when integrated with my application:

[tcaduser]

FWIW, that screenshot is from my iphone, and not a simulator.

[tcaduser]

thank you

[AndreMiras]

Awesome stuff, thanks for the PR and for addressing some of the comments and CI issues already.
Great progress overall.
CI is failing with:

2023-09-09T19:46:09.5904620Z [DEBUG   ] error: command '/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/kivy_ios-2023.8.24-py3.11.egg/kivy_ios/tools/cpplink' failed: No such file or directory

refs https://github.com/kivy/kivy-ios/actions/runs/6131086632/job/16643997732?pr=858
If I had to guess I would say cpplink should be added to the MANIFEST.in.

I've also gave some ideas to help with cpplink readability, let me know what you think

[AndreMiras]

LGTM, thanks for addressing.
Will merge after the build_updated_recipes build turns green

[tcaduser]

Looks like I needed to include some template files in the Manifest. These were brought over from p4a.

[AndreMiras]

Great that you saw it too, thanks for addressing already.
Here's the error for records.

2023-09-09T22:05:49.5544410Z FileNotFoundError: [Errno 2] No such file or directory: '/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/kivy_ios-2023.8.24-py3.11.egg/kivy_ios/recipes/matplotlib/setup.cfg.template'

I'll be away from keyboard until tomorrow UTC to review/merge.
Good luck for the build 🤞

[tcaduser]

I think I found the last issue in getting the right include file for numpy.

[AndreMiras]

CI happy well done 👏
Thanks for the quick follow up

[tcaduser]

Thanks so much for your help in getting this reviewed and accepted.