CeDeROM add FreeBSD support 20221014.

[cederom]

1. Initial FreeBSD support using Linux binaries.

• FreeBSD can emulate Linux ELF binaries [1].
• Use the same process for FreeBSD as for Linux.
• Add FreeBSD recognition in checks.

[1] https://docs.freebsd.org/en/articles/linux-emulation/

2. Fix 64-bit detection based on os.uname.

• Not every OS uses x86_64 in uname (i.e. FreeBSD uses amd64).
• Every 64-bit OS will have 64 in uname.
• Alternatively platform.architecture()[0] will return 64bit.

[misl6]

LGTM.
Left a minor suggestion that may help contributors in future.

[cederom]

Updates:

1. Provided patches enables download and run of Linux binaries on FreeBSD.
2. Google NDK also has some Linux only hardcodes, but fixing them enables build on FreeBSD. Problem already reported to NDK Dev Team: [BUG] shell interpreter hardcode #!/bin/bash update to #!/usr/bin/env bash. android/ndk#1780 (comment).
3. Some Recipes can be built and some not because of Linux only hardcodes, but this is a separate P4A issue, probably will need a dedicated fix to each of the problematic dependency upstream. TODO.
4. It would be really nice to have this PR included in the upcoming Buildozer release as that would enable further work with P4A fixes :-)

[cederom]

Here is my local fork of NDK with several commits that enables build on FreeBSD. Bugs are reported to Google Android NDK team + fixes provided.

https://github.com/cederom/google-android-ndk/tree/cederom-freebsd

Note: Recipes does not build yet.

[cederom]

Not sure if its worth the effort to work with a so called "OpenSource" project (Google/Android/NDK) that rejects (as "not planned") even trivial patches to make it work on other platforms than officially supported :-(

android/ndk#1785

[cederom]

Allright two of the three patches were accepted :-)

• https://android-review.googlesource.com/c/platform/ndk/+/2261302
• https://android-review.googlesource.com/c/platform/ndk/+/2261304

Third one is in progress and under discussion on how to best enable FreeBSD operations without having official support from Google NDK team :-)

• https://android-review.googlesource.com/c/platform/ndk/+/2261303

[misl6]

LGTM. Thank you!
Please keep us posted about FreeBSD support on Android NDK. 😄

[cederom]

Thank you @misl6 :-) When is next Buildozer release planned? :-)

[misl6]

Thank you @misl6 :-) When is next Buildozer release planned? :-)

Nothing planned, but considering the current status we are likely going to have a new release in the first week of November.