https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94761
--- Comment #3 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Commit e69bf64be925 added the host and target flags originally, and it
seems to have been just a mistake that is used --build=${build_alias}
--host=${build_alias}. (Now of course that has spread to many more
places.)
