[PATCH] D88157: [CMake] Make sure _cmake_system_name has a default

[Steven Wan via Phabricator via llvm-commits]

stevewan accepted this revision.
stevewan added a comment.

This is consistent with the CMAKE default behaviour. LGTM. Let's see if other reviewers have further input about the updated comment.


Repository:
  rG LLVM Github Monorepo

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https://reviews.llvm.org/D88157