Joe Groff dffd1b27a1 Use autolinking to pull in compatibility libraries. ...

Many build systems that support Swift don't use swiftc to drive the linker. To make things
easier for these build systems, also use autolinking to pull in the needed compatibility
libraries. This is less ideal than letting the driver add it at link time, since individual
compile jobs don't know whether they're building an executable or not. Introduce a
`-disable-autolink-runtime-compatibility` flag, which build systems that do drive the linker
with swiftc can pass to avoid autolinking.

rdar://problem/50057445

2019-05-31 13:11:14 -07:00

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