Mike Ash 44d06a7faf [Runtime] Remove the _swift_classIsSwiftMask variable. ...

SWIFT_CLASS_IS_SWIFT_MASK is optionally defined to a global variable _swift_classIsSwiftMask, which allows the runtime to choose the appropriate mask when running on OS versions earlier than macOS 10.14.4. This is no longer a supported target for newly built runtimes (Swift apps built with such a target will embed a copy of the back deployment runtime, which is separate) and this global is no longer useful. Instead, unconditionally define SWIFT_CLASS_IS_SWIFT_MASK to 2 on Apple platforms, which is the correct value for current OS versions.

rdar://48413153

2021-04-22 16:25:46 -04:00

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