[PATCH] D45835: Add new driver mode for dumping compiler options

[Eli Friedman via Phabricator via cfe-commits]

efriedma added a comment.

> If any of those options we care about wind up being changed, there's a good chance we may need to change something on our end anyway, so breaking us is actually useful.

I'm not sure I follow.  The language options have specific consequences you could check some other way, so they're "stable" in the sense that the same flags will produce the same result (e.g. LangOpts.FastMath represents whether __FAST_MATH__ is defined).  So it should be possible to provide the data somehow; I'm more concerned about taking names and enum values from LangOptions.def itself.


https://reviews.llvm.org/D45835