[Bug bootstrap/107042] GCC build error after today's change

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107042

--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Because incremental rebuilds for trunk are not supported. If it works, that's
nice, if it doesn't, it's not a bug. Do a clean build.