> On Sep 13, 2016, at 12:29 PM, Brian Gesiak via swift-evolution 
> <[email protected]> wrote:
> 
> I hadn't thought about a unified overlay for POSIX. I think the simplified 
> import alone has benefit to warrant its own evolution proposal. Would it be 
> possible to have a separate discussion for the POSIX overlay idea? Or is 
> there a reason that I'm missing that prevents the import from being viable on 
> its own? (Apologies in advance if there's an obvious answer to this question!)

I've heard the argument before that we should do a full overlay, but I think 
this is becoming a case of the perfect being the enemy of the good. Having some 
sort of "just import whatever the system libc is called" module would be a 
significant improvement in practice over the state of the art, even if we don't 
do any other adaptation.

Here's what I would suggest. We have a convention for exposing "raw" imports of 
C libraries: you call them `C\(libraryName)`. So I would suggest we introduce a 
`CLibc` module which provides a raw import of the system's libc. If we later 
decide to do a full-featured overlay, that's great—we can call it `Libc`. But 
`CLibc` by itself would be an improvement over the status quo and a step in the 
right direction.

-- 
Brent Royal-Gordon
Architechies

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