[swift-users] Linux / ARM?

[Dmitri Gribenko]

On Thu, Dec 3, 2015 at 4:50 PM, Brian Swetland <swetland at frotz.net> wrote:
> On Thu, Dec 3, 2015 at 3:59 PM, Dmitri Gribenko <gribozavr at gmail.com> wrote:
>>
>> On Thu, Dec 3, 2015 at 3:50 PM, David Abraham <sirdavidabraham at gmail.com>
>> wrote:
>> >
>> > Is a Linux / ARM port on the horizon? I'm interested in using Swift with
>> > Rasberry Pi
>>
>> We don't have resources to develop the port ourselves, but Swift ports
>> to non-x86 architectures are most welcome!
>
>
> Any pointers or existing docs to look at regarding bringup against new
> architectures?

I'd attack this problem in this order:

* Make C++ pieces build, while not breaking existing platforms:

** Make build-script-impl invoke cmake on your platform.

** Make the required cmake changes (hopefully close to none).

** Make the C++ compiler code build with your C++ compiler and standard library.

** Implement the necessary plumbing for running tests, remotely on the
target device, if you are cross-compiling.

* Checkpoint: make ./validation-test/stdlib/MicroStdlib.swift test pass.

* Make the standard library build:

** Make the runtime build.

** Make the core standard library and StdlibUnittest build.

* XFAIL all failing tests for your platform.

* Make validation-test/stdlib/StdlibUnittest* tests pass.  This will
likely involve fixing a few portability issues in the library and the
runtime.

* Make the rest of the tests pass incrementally.

> I'm definitely interested in Linux-ARM as a target as well (cross-compiled
> more interesting than self-hosted).

Do you mean building a cross-compiler, or cross-compiling the swift
compiler for ARM?

> I'd hope, given it's based on LLVM and targets IOS-ARM, that this would not
> be a horribly complex thing to attempt.

Since it is an ELF platform, and running Linux, I don't expect major issues.

Dmitri

-- 
main(i,j){for(i=2;;i++){for(j=2;j<i;j++){if(!(i%j)){j=0;break;}}if
(j){printf("%d\n",i);}}} /*Dmitri Gribenko <gribozavr at gmail.com>*/