Use the versioned triple outside of Darwin #1209
Merged
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Some platforms require the normal, versioned triple to be supplied for the target flag, as Swift modules use this versioned triple as a subdirectory. If the unversioned triple is used instead, the standard library won't be found on these platforms.
Instead, use the unversioned triple only on Darwin. This also should be a noop on Linux. This behavior matches swiftlang/swift-package-manager#3576 and swiftlang/swift-tools-support-core#229 which contain additional context.