What is the state of D with Android/iOS

[Joakim via Digitalmars-d]

On Tuesday, 24 February 2015 at 17:55:59 UTC, Rishub Nagpal wrote:
> On Tuesday, 24 February 2015 at 17:15:28 UTC, Joakim wrote:
>> If you simply want to call a D library within an Android/iOS 
>> app, that's possible, though there are still some rough edges.
>>  Specifically, there is still some work to be done with 
>> certain floating-point operations on iOS 
>> (http://forum.dlang.org/post/m2mw4tab0w.fsf@comcast.net) and 
>> while Android/x86 will work fine 
>> (http://wiki.dlang.org/Build_DMD_for_Android), Android/ARM 
>> doesn't currently support TLS.  That lack of TLS support means 
>> you'd have to run a slightly patched druntime and I'm fairly 
>> certain phobos wouldn't work.
>
>
> Could any of these patches be used as a basis to remedy it?
>
> https://groups.google.com/forum/#!topic/0xlab-devel/aSOcm3c9PFk
> https://bugs.kde.org/show_bug.cgi?id=302709
>
> Could you in theory recompile Android to support TLS and then 
> try to compile an executable for Android/ARM ?

Sorry, the way I wrote that may have been confusing: I meant that 
ldc doesn't currently support any form of TLS for Android/ARM.

Native TLS is not supported on Android/bionic for any 
architecture, whether x86 or ARM.  I worked around this on x86 by 
removing the SHF_TLS and STT_TLS flags from the ELF objects and 
using pthread_setspecific/pthread_getspecific instead (more 
details on the dmd PR: 
https://github.com/D-Programming-Language/dmd/pull/3643), which 
is basically how Walter implemented TLS on OS X/Mach-O years ago, 
as OS X didn't support native TLS till 10.7 and their TLV APIs 
are still undocumented.

I need to patch llvm in a similar way to that dmd PR, so that 
Android/ARM can use the same scheme.  It appears that Dan did 
something similar with his patched llvm for iOS.

As for your linked Android patches, that might be possible but 
would be pointless unless you are only deploying to a device you 
patched the OS for.  Better to patch llvm to support the same TLS 
scheme used for Android/x86.