[Bug libstdc++/123241] Missing typedefs int128_t and uint128_t

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123241

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
i.e. the semi-colon is significant, it means the requirement is only for the n
= 8, 16, 32, and 64 types.