Thanks Alex,

This is similar to what I though. Appreciate you taking time to explain.



> On Oct 6, 2017, at 1:38 AM, Alex Blewitt <alb...@apple.com> wrote:
> 
>> On 5 Oct 2017, at 22:47, Igor Mironenko via swift-users 
>> <swift-users@swift.org> wrote:
>> 
>> This may be a strange question, but I would like to understand, since both 
>> Mac OS and Nuttx RTOS are POSIX certified would it be possible in any way to 
>> create a program using Swift language but compile to run it on Nuttx? 
>> 
>> Is it something that would require a special compiler to be build 
>> specifically for Nuttx, just like there is one for Swift for Linux? In my 
>> understanding Swift compiles to a binary code and does work with C/C++. What 
>> am I missing here? I googled and looks like I'm the only one interested in 
>> such work.
> 
> Hi Igor,
> 
> Currently Swift requires libraries such as libswiftCore to be compiled for 
> the target platform before being able to compile Swift programs for that 
> platform. This has a number of dependencies, including being able to build a 
> custom build of clang and other support libraries such as dispatch and 
> foundation.
> 
> While there is work that allows this project to be compiled for Linux 
> platforms, and others are working on porting it to Android, and other more 
> estoteric platforms, there's nothing been done so far (that I'm aware of) 
> that has targetted Nuttx.
> 
> You are likely to have to do some work in order to get Swift building on 
> Nuttx first - once that's done, you may be able to cross-compile programs 
> from a Mac to do there.
> 
> Alex

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