Ehem, ARM

[Chris]

On Monday, 25 November 2013 at 10:38:24 UTC, Joakim wrote:
> On Friday, 22 November 2013 at 18:01:44 UTC, Joakim wrote:
>> I spent some time setting up the appropriate VMs and looking 
>> at the relevant Android dev tools myself.  It appears that the 
>> Android NDK uses a lightly patched version of stock llvm/clang 
>> 3.3, along with the gold linker.  Their patches are available 
>> online:
>>
>> https://android.googlesource.com/toolchain/llvm/+log/release_33
>> https://android.googlesource.com/toolchain/clang/+log/release_33
>>
>> Their llvm is the same as llvm 3.3 until commit ce33750 and 
>> clang is the same until commit 20c7d45.  The stock llvm/clang 
>> 3.3 have some limited support for Android, not much.  I'm 
>> going to start going through those patches next.
>>
>> Since there are only about 50-100 llvm/clang patches, many of 
>> them architecture-specific and so not necessary, this suggests 
>> that the Android ABI is not that different from linux.
> Alright, went through all the Android llvm/clang patches and 
> there's little of significance.  They hardcode two clang 
> options for android/x86, -mstackrealign and -msse3, add a few 
> tweaks for ARM, and that's about it.  Most of the patches are 
> for some other NDK work by MediaTek, which don't appear to be 
> used by the official Android NDK.
>
> I was able to compile an identical stripped shared library from 
> the samples just by using the stock clang 3.3 that's installed 
> in Arch linux, once I added the two hardcoded flags in with the 
> rest of the flags their makefiles generate, so you really don't 
> even need to use their compiler, at least for Android/x86.
>
> Next step, get dmd to do the same with a "hello world" native 
> Android app.  I'll update this thread as I go, for anyone who's 
> interested.

Thanks, I'm interested.