[clang] Make PCH's respect any VFS specified. (PR #106577)

[Henrik Karlsson via cfe-commits]

honkstar1 wrote:

I'm working with Neil and I've just tried changing our system to work the way where all our rsp etc use virtual paths and then create a vfsoverlay that points to the "right" places... it almost works for portable pch.

What is not working is "#include_next".. that gets resolved to a non-virtual path which is written into the .pch and .d files. For example this file: Unix\LibCxx\include\c++\v1\stddef.h has "#include_next <stddef.h>"

Are there any options to control that?


https://github.com/llvm/llvm-project/pull/106577