[PATCH] D69825: [Clang][Driver] Re-use the calling process instead of creating a new process for the cc1 invocation

[Nico Weber via Phabricator via llvm-commits]

thakis added a comment.

Thanks for seeing this through!

> env var or flag

Our build setup can easily add commandline flags, but it can't easily add env vars. So I think this should have a driver mode flag.

For people who asked for an env var: Why do you need an env var for this? Almost all compiler settings are accessible by flag but not by env var. Why is this one special?


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https://reviews.llvm.org/D69825