Allan Shortlidge 164ac421d6 Sema: Lift restriction preventing use of #_hasSymbol on non-Darwin platforms. ...

An early approach to codegen for `#_hasSymbol` relied on the Darwin platfom SDK, but now that the feature lowers directly to NULL checks in LLVM IR a platform restriction is no longer needed.

However, the tests for `#_hasSymbol` remain unsupported on Windows since that OS does not support weak linking.

2022-11-30 14:58:28 -08:00

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