[swift-users] Improving a simple C binding

[Max Howell]

> > Another option would seem to be modelling the daylights out of build environments but I think this runs afoul of enumerations. Right now we have `os(Linux)` but we'd really need `os(Ubuntu)`, `os(RedHat)` and so forth to handle dependencies like these. And if people are working on a new distro -- or merely want a new platform tag even though they are on a stock distro -- this would fail unless they rebuilt the Swift compiler or package manager with an extended enumeration.
> 
> Well, the module maps aren’t Swift so it wouldn’t work. Certainly we could allow some kind of #if syntax in module maps, but I think the elegance of one-file per platform will be enough and is much simpler.
> Maybe I wasn’t clear here. This passage is about the platform names — how do we keep discovery flexible? I’m assuming there is an enum somewhere — OSX, Linux, iOS — in the compiler and what I’d like to suggest is, a centralized registry like that will create maintenance headaches for maintainers and frustrate developers, too. So taking one file per platform as a given, as long as platform discovery is easily extended then porting libraries is easy — add a new platform file, or even pass the “compatible platform” as an option.
> 

I’m sorry, I don’t understand.

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