[PATCH] D52773: clang-cl: Add /showFilenames option (PR31957)

[Reid Kleckner via Phabricator via cfe-commits]

rnk added a comment.

It doesn't address the version skew issue, but my blanket argument against any new environment variable is the existance of things like `_CL_` and `CCC_OVERRIDE_OPTIONS`. You can set any compiler flag you want from the environment, so we should standardize on one way of setting options: flags.


https://reviews.llvm.org/D52773