duplicates:

• SR-7824 swiftpm ignores missing source symlinks

Issue Description:

Filed on behalf of @ddunbar:

When making port packages, I usually start off by making the vendored code accessible (e.g., via a submodule) and then symlinking in the code to match SwiftPM’s expected structure.

This works well, but one confusing situation is when you symlink an entire subdirectory, SwiftPM won’t traverse it looking for sources to build. This should probably be a warning.

Something like:

 Package.swift
 vendor/a/foo/foo.c
 Sources/a/foo -> ../../vendor/a/foo

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