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

[pinskia at gcc dot gnu.org]

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

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
linux is a macro defined to 1.  In <> case the macro is expanded while in ""
case, the token is a string.