[PATCH] D40998: [driver][darwin] Take the OS version specified in "-target" as the target OS instead of inferring it from SDK / environment

[Alex Lorenz via Phabricator via cfe-commits]

arphaman created this revision.
Herald added a subscriber: javed.absar.

The OS version is specified in `-target` should be used instead of the one in an environment variable / SDK name.

rdar://35813850


Repository:
  rC Clang

https://reviews.llvm.org/D40998

Files:
  lib/Driver/ToolChains/Darwin.cpp
  test/Driver/appletvos-version-min.c
  test/Driver/darwin-multiarch-arm.c
  test/Driver/darwin-stdlib.cpp
  test/Driver/darwin-version.c

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