[PATCH] D46520: [Driver] Use -fuse-line-directives by default in MSVC mode

[Martin Storsjö via Phabricator via cfe-commits]

mstorsjo added a comment.

In https://reviews.llvm.org/D46520#1092233, @rnk wrote:

> Please don't do this, this is actually really problematic, since `#line` directives lose information about what's a system header. That means the result of -E usually won't compile, since Windows headers are typically full of warnings and default-error warnings.


Oh, ok - I can revert it then; I didn't have any specific need for this, I just noticed that clang in msvc mode and cl.exe differed in this aspect.


Repository:
  rL LLVM

https://reviews.llvm.org/D46520