Alex Lorenz 701456b523 [darwin] add support for __isPlatformVersionAtLeast check for if (@available) ... The __isPlatformVersionAtLeast routine is an implementation of `if (@available)` check that uses the _availability_version_check API on Darwin that's supported on macOS 10.15, iOS 13, tvOS 13 and watchOS 6. Differential Revision: https://reviews.llvm.org/D90367		2020-11-02 16:28:09 -08:00
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Darwin	[darwin] add support for __isPlatformVersionAtLeast check for if (@available)	2020-11-02 16:28:09 -08:00