[llvm-bugs] [Bug 30529] clang generates warnings if use preprocessed files.

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=30529

Richard Smith <richard-llvm at metafoo.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |richard-llvm at metafoo.co.uk
         Resolution|---                         |WONTFIX

--- Comment #1 from Richard Smith <richard-llvm at metafoo.co.uk> ---
We do not consider this to be a bug. We have heuristics in our warnings that
depend on whether the tokens come from a macro expansion, so it is expected
that preprocessed source will sometimes produce different warnings.

If you want to avoid this, use -E -frewrite-includes instead of just -E.

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