[swift-users] Swift Package Manager: Linker Flags

Daniel Dunbar daniel_dunbar at apple.com
Mon Jan 4 12:08:56 CST 2016

You can't do this via the package manager, but you can include "link" declarations in the module map itself which specify additional linker arguments to plumb through when that module is used. See:

Here is a concrete example, which is how Swift knows to automatically link libpthread and libdl when Glibc is used:

 - Daniel

> On Jan 1, 2016, at 4:48 PM, Ilija Tovilo via swift-users <swift-users at swift.org> wrote: 
> Happy new year everyone! 
> I’m writing a wrapper around the LLVM-C API for Swift and thought it’d be fun to use the Swift Package Manager.
> So I created a repository for the module.modulemap that includes the relevant .h files (as instructed in Documentation/SystemModules.md in the GitHub repository).
> The package itself compiles fine and building the project that includes it works too, except that it doesn’t link. 
> The problem is that you have to pass some LLVM linker flags and I have no idea how to do that with the Swift Package Manager.
> I’ve searched the tutorials, documentation and the source code but couldn’t find a solution.
> Is there a way to add linker flags / compile flags to your Package.swift file?
> It would be helpful to pass those flags manually, at least until the package manager is mature enough to handle those things on its own.
> Thanks for the help!
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