AFAIK, variadic C functions are not (yet) callable from swift code.
> Le 18 oct. 2014 à 20:37, Rick Mann <rm...@latencyzero.com> a écrit :
>
> I need access to fcntl, so I thought I'd do what Apple does with Darwin. But
> I don't actually see how to do that. They create Darwin.stdio.fopen(), for
> example. But then how do they call the underlying C fopen()?
>
> For that matter, Swift can call C functions directly in some cases, and not
> at all in others.
>
> OH! Is it because fcntl is special? Check out its declaration:
>
> int fcntl(int, int, ...) __DARWIN_ALIAS_C(fcntl);
>
> __DARWIN_ALIAS_C is:
>
> #define __DARWIN_ALIAS_C(sym) __asm("_" __STRING(sym)
> __DARWIN_SUF_NON_CANCELABLE __DARWIN_SUF_UNIX03)
>
> So, is there some magic module I can create in Swift to make that accessible
> to my Swift code?
>
> --
> Rick Mann
> rm...@latencyzero.com
>
>
>
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