[Bug c++/84400] “linux” string in path replaced with “1” when using “<>” angle brackets to include a header through a macro

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84400

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
You can also just use the "" version instead of <>. Since you're using an
absolute path it makes no difference anyway, the same file will always be
included.