[Bug c++/71517] g++ gives different warnings if compiling a file directly or adding preprocess step

[albert.astals at canonical dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71517

--- Comment #3 from Albert Astals Cid <albert.astals at canonical dot com> ---
Ok, i see, this is regarding ccache bug
https://github.com/ccache/ccache/issues/93