I abandoned my previous attempt to modify MACHDEP in configure: PR #5287.

Great, it works on arm7. And anyway MACHDEP won't help for loading android abi flavor of modules.

And anyway MACHDEP won't help for load android abi flavor of modules.

Note: While checking how MACHDEP is used, I found deadcode. I proposed a PR to remove it: PR #5289.

I don't know well the "multiarch" thing and I'm not confortable with autotools, so I chose to write this minimalist and self-contained change which only impacts sys.platform.

good effects, now instead of tring to load _sysconfigdata_dm/m_linux_.py it seeks for _sysconfigdata_dm/m_android_.py, which allows the two flavors to coexist nicely. Maybe now need code to generate multiarch ( api / cpu / bitness ) infos and store them in that file so modules build tools can use those. ( i see that ANDROID_API_LEVEL is already there )

Most likely at least MACHDEP should be modified, too.

>>> sysconfig.get_config_var('CFLAGS')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/data/local/tmp/python3/usr/lib/python3.7/sysconfig.py", line 595, in get_config_var
    return get_config_vars().get(name)
  File "/data/local/tmp/python3/usr/lib/python3.7/sysconfig.py", line 544, in get_config_vars
    _init_posix(_CONFIG_VARS)
  File "/data/local/tmp/python3/usr/lib/python3.7/sysconfig.py", line 415, in _init_posix
    _temp = __import__(name, globals(), locals(), ['build_time_vars'], 0)
ModuleNotFoundError: No module named '_sysconfigdata_m_android_'

In my build tree, there's build/target/python/usr/lib/python3.7/_sysconfigdata_m_linux_.py but no build/target/python/usr/lib/python3.7/_sysconfigdata_m_android_.py. If I understand the build process correctly, _sysconfigdata file is generated via $(PYTHON_FOR_BUILD) -S -m sysconfig --generate-posix-vars call in Makefile.pre.in, and PYTHON_FOR_BUILD uses MACHDEP via _PYTHON_SYSCONFIGDATA_NAME:

Note that this is tested with my building scripts at https://github.com/yan12125/python3-android/ using NDK r16b, not xdegaye's scripts. I tested ARM64, android-21 API on my ASUS ZE500KL phone.

@yan12125 i suggest to build sysconfigdata_m_android.py from a template as most of collected data in that file is only efficient for pip and setuptools when referencing a native compiler. If you look at the generated_sysconfigdata_m_linux_.py when cross compiled : it is full of reference to $HOST not $TARGET.