[swift-users] C vararg: Swift Package Manager and System Modules

Chris Lattner clattner at apple.com
Fri Dec 18 13:42:05 CST 2015

> On Dec 17, 2015, at 1:47 PM, Daniel Eggert via swift-users <swift-users at swift.org> wrote:
> If I need access to the C fcntl(2):
>  int fcntl(int, int, ...)
> can I get the swift-package-manager or swift-build-tool to compile C code that wraps this into a non-vararg version:

Hi Daniel,

I’m pretty sure that Swift 2.2 master supports fcntl on both linux and darwin platforms.  What version are you using?

This support is done with “overlays” that you can see here:


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