androidenv 1.0

Build native packages for Android.

    ## Requirements
    
     - Python;
     - Android SDK;
    
    The Android SDK can be installed from [Android Studio][].
    
    Then set the environment variable [ANDROID_SDK_ROOT][] or ANDROID_HOME.
    
    Finally, Python's [distutils][] package must be patched for cross-compiling.
    The patch is in the patches directory.  Apply it like so:
    
        DESTLIB=$(python -c "import sysconfig; \
            print(sysconfig.get_config_var('DESTLIB'))")
        patch -p2 -d $DESTLIB < patches/patch-Python-3.10.0.txt
    
    This patch should apply to any version of Python.
    
    You may need to use sudo.
    
    
    [Android Studio]: https://developer.android.com/studio/
    [ANDROID_SDK_ROOT]: https://developer.android.com/studio/command-line/variables
    [distutils]: https://docs.python.org/3/library/distutils.html
    
    
    ## Install androidenv
    
    Install from the Python Package Index:
    
        pip install androidenv
    
    You can also copy the file androidenv.py to where you need it,
    it is self contained.
    
    
    ## Usage
    
    Build something from source:
    
        cd thing
        python -m androidenv setup.py build
        python -m androidenv setup.py install
    
    You really want to do this in a [virtual environment][venv].
    
    
    [venv]: https://docs.python.org/3/library/venv.html
    
    
    Use the --find-library option to find libraries like libandroid or liblog:
    
        python -m androidenv --find-library android log
    
    
    ## Environment variables
    
    This module works entirely with environment variables.
    
    Input environment variables:
    
     - ANDROID_SDK_ROOT or ANDROID_HOME (required);
     - ABI (optional; armeabi-v7a or arm64-v8a);
     - API (optional);
     - DEBUG (optional; 0 or 1);
    
    What is being built must respect the following evironment variables:
    
     - AR
     - AS
     - CC
     - CFLAGS
     - CPP
     - CPPFLAGS
     - CXX
     - CXXFLAGS
     - LD
     - LDFLAGS
     - PATH
     - RANLIB
     - READELF
     - STRIP
    
    Many packages do, many don't.  Python itself (distutils) does not respect
    RANLIB; CMake does not respect CPPFLAGS; and many more.  Fixing that is
    your homework.
    
    ### setup.cfg
    
    Some useful configuration options when building for Android:
    
        [build]
        build-base = build
        build-temp = build/tmp
        build-lib = build/lib