[Bug ada/104856] Build gcc with a target not containing '-gnu' gets added to gnat target

[schwab--- via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104856

--- Comment #2 from Andreas Schwab <sch...@linux-m68k.org> ---
--target defaults to --host when not given (and --host defaults to --build when
not given).  Looks like something is using the canonical target name instead of
the target alias.