modification for compatibility (AIX, Android NDK), for smartversion compile

[gvollant]

some compatibility patch are from previous pull request

Pull requet #25 was accidentelly closed, so I reopen this PR

[gvollant]

@janisozaur @richgel999 can you look at #27

[gvollant]

@richgel999 I made a minor update to compile on macos 11 on arm64

I'll be happy if you take a look !

[gvollant]

@janisozaur you can also look

[janisozaur]

My objection regarding improper commit message still stands

[janisozaur]

modification for compatibility for smartversion compile (including android), some compatibility patch are from previous pull request

is not something I would ever want to see as a commit. It does not explain what the "modification for compatibility" is; "modification", as in "code change" is already implied; the "previous pull request" doesn't refer to anything in particular.

The subject line should be glanceable and short, written in imperative mode and above all, should actually explain what it does.

E.g.:

Improve Android support

or

Extend Android support with better memory allocation

or something in that vein