porting gnupg to Android, is pth required?

[Hans-Christoph Steiner]

On Jan 19, 2012, at 9:41 AM, Simon Josefsson wrote:

> Werner Koch <wk at gnupg.org> writes:
> 
>> On Wed, 18 Jan 2012 23:52, hans at guardianproject.info said:
>> 
>>> strange errors.  Also the 'allocsa' module seem to have become the
>>> 'malloca' module, so that's what I used.  Any idea how much work it is
>>> to remove gnulib?
>> 
>> Gnulib is only used on non gnu platforms to support some important
>> features not, or not well, defined by Posix.  You problem here is about
>> the libc, used by Android.  I am pretty sure the gnulib folks are
>> interested in helping out.  
>> 
>> Simon, do you think the problem is due to GnuPG's old style use of
>> gnulib?  Or is Android not yet supported?
> 
> The error messages suggests it is the former, you need to integrate
> gnulib in the documented way otherwise there will be many strange
> compiler errors.  I don't recall any significant discussions involving
> Android as a porting target, but I think that is mostly because of lack
> of testers not that it is intentionally not supported.
> 
> I could help with the gnulib infrastructure in GnuPG if you want, I
> think there is good opportunitity to reduce code duplication.
> 
> The first thing to do for Android would be to build a gnulib mega
> tarball for the environment -- that way we'll identify any gnulib bugs
> immediately.  Running the extensive set of self checks will also be
> quite interesting, implementing a POSIX system is not easy.  Doing this
> would be quite interesting.  Where do I find a android cross-compiler?

Excellent, thanks for stepping up on this!  Here's the Android cross-compiler, its a big tarball of a custom gcc build, some libs, and some utilities:

http://developer.android.com/sdk/ndk/index.html

I work on Debian, Ubuntu, and Mac OS X.  I have taken to untarring the above in /usr/local, then making a /usr/local/android-ndk symlink to the versioned directory.  I also attached my bash settings to set the path and some env vars for the Makefiles.  I don't think you'll need to download the Android SDK stuff at all.

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