Python 3 Android

This is an experimental set of build scripts that will cross-compile the latest Python 3 git master for an Android device.

Build status:

System	Status
Linux (GitLab)

Prerequisites

Building requires:

1. Linux. This project might work on other Unix-like systems but no guarantee.
2. Android NDK r19 beta 1 or newer installed and environment variable $ANDROID_NDK points to its root directory. NDk r18 or below is not supported.

Running requires:

1. Android 5.0 (Lollipop, API 21) or above
2. arm, arm64, x86 or x86-64

Build

# CPython requires explicit --build
CONFIG_SITE="$PWD/Android/config.site" ./configure \
    --prefix=/usr --enable-shared --host=armv7a-linux-androideabi --build=x86_64-linux-gnu --disable-ipv6

Installation

1. Make sure adb shell works fine
2. Copy all files in it to a folder on the device (e.g., /data/local/tmp/python3). Note that on most devices /sdcard is not on a POSIX-compliant filesystem, so the python binary will not run from there.
3. In adb shell:

cd /data/local/tmp
. ./python3/tools/env.sh
python3.9

And have fun!

SSL/TLS

SSL certificates have old and new naming schemes. Android uses the old scheme yet the latest OpenSSL uses the new one. If you got CERTIFICATE_VERIFY_FAILED when using SSL/TLS in Python, you need to generating certificate names of the new scheme:

python3.9 ./python3/tools/c_rehash.py

Check SSL/TLS functionality with:

python3.9 ./python3/tools/ssl_test.py