[Bug libstdc++/107801] Building cross compiler for H8 family fails in libstdc++ (c++17/memory_resource.cc)

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107801

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
But you probably don't want those huge pools if you only have 16-bit int, so
checking __SIZE_WIDTH__ isn't enough here.