pyinstaller

[snippsat]

The Python version you use now is missing some libraries that Pyinstaller need.
Can try this as a fix without having to rebuild.

sudo apt-get install libpython3.7-dev

PyInstaller is tested against Windows, Mac OS X, and GNU/Linux. However,
it is not a cross-compiler: to make a Windows app you run PyInstaller in Windows;
to make a GNU/Linux app you run it in GNU/Linux, etc.

So need to build on each platform.
So now the have build hello.py on two platforms.
Could make it like this so it use right executable on OS it's on.

import platform
import subprocess

if platform.system() == 'Windows':
    subprocess.run('hello.exe')
elif platform.system() == 'Linux':
    subprocess.run('./hello')
else:
    print('Mac')