[PATCH] D144603: Add option to disable compiler launcher on external projects

[Shoaib Meenai via Phabricator via cfe-commits]

smeenai added a comment.

Hmm, what cache key does ccache use for compilers? Is it the `--version` output string, the path, or some combination? If the path is involved then I don't see any value in using ccache for configuring anything past stage1, since the compiler will (presumably) be installed somewhere else afterwards and not used directly from the build tree. If it's just `--version`, what are the cache pollution concerns? The compiler binaries output by all the stages should produce the same outputs given the same inputs (and presumably have the same `--version`), right?


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D144603/new/

https://reviews.llvm.org/D144603