[tor-bugs] #31882 [Core Tor/Tor]: move Android build config into core tor

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#31882: move Android build config into core tor
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 Reporter:  eighthave            |          Owner:  (none)
     Type:  defect               |         Status:  new
 Priority:  Medium               |      Milestone:  Tor: 0.4.3.x-final
Component:  Core Tor/Tor         |        Version:
 Severity:  Normal               |     Resolution:
 Keywords:  Android, tbb-mobile  |  Actual Points:
Parent ID:                       |         Points:
 Reviewer:                       |        Sponsor:
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Comment (by eighthave):

 Looks like the JNI wrapper can be entirely based on what's in
 ''tor_api.h'.  You can get an idea now of what this needs, it uses only
 the pieces in the current ''src/feature/api/tor_api.[ch]''.  This is based
 on @sysrqb's work in #26653, e.g:
 https://gitweb.torproject.org/user/sysrqb/tor.git/commit/?h=testing_26653&id=731b7e2b176f7cf6439c1286886492998e58cd7f

 My big question is now to add a new ''src/feature/jni'' section and still
 have its symbols exported.  When I add my files to ''src/feature/jni'', it
 builds fine, but then its missing the exported JNI functions.  The symbols
 make it into the ''libtor-app.a'' but not the ''libtor.so''.  My hack for
 now is to just add the JNI code to ''src/feature/api/tor_api.[ch]'', that
 works.  The idea is to have `./configure --enable-jni`.  Here's that in
 progress code with the autotools changes:
 https://gitlab.com/eighthave/tor/commit/a453e9faf3e4be946506111754b18f9fcf1ac595

 I already have a working Android CI build in gitlab-ci (plus I started
 porting the ''.travis.yml'' to ''.gitlab-ci.yml'' while I was at it and
 threw in a couple of distro builds).  It should be relatively
 straightforward to port the Android CI job ''.travis.yml'' for someone who
 know that whole matrix setup.
 https://gitlab.com/eighthave/tor/blob/dbeb6f7d8/.gitlab-ci.yml
 And here's an example run on the latest ''master'':
 https://gitlab.com/eighthave/tor/pipelines/85003730

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/31882#comment:3>
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