[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 "

Are there any options to control that?


https://github.com/llvm/llvm-project/pull/106577
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[clang] Make PCH's respect any VFS specified. (PR #106577)

[Henrik Karlsson via cfe-commits]

honkstar1 wrote:

Adding to @sheredom ... the precompiled headers are actually portable now 
(hurray!).. the single last non-virtual path we see is in the object files 
(.o). And it is related to the working dir as mentioned.


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