@jckarter Look familiar? Is the -pie only used during linking and should something else be passed at other times?

@belkadan You might be interested as well.

I'm not sure exactly, but it would make sense that it's only really necessary when linking executables. The warning ought to be harmless, at least.

Can we revert the PR until proper fix is placed?

I would rather not, personally; PIE is a functional necessity for linking Swift executables correctly, whereas this is merely a warning.

When do we invoke Clang that isn't for linking? Or is that coming from the importer somehow?

Comment by Gregor Milos (Grzegorz Miłoś) (JIRA)

I've put in a PR: #11669

based on: #11510

Somewhat related: do you think there's a case for not warning about `-pie` on macOS to make the command line flags compatible with both macOS and Linux when using -Werror? Or do you think users should should be required to conditionally pass this flag.

It'd be reasonable to ask the clang folks that. It seems harmless since code for macOS/iOS/etc. should generally always be built PIC to begin with, so it's not really "ignoring" the argument per se.