https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84764
--- Comment #5 from joseph at codesourcery dot com <joseph at codesourcery dot com> --- Also, for it to become an extended integer type, it would be necessary to define integer constant suffixes and implement printf / scanf support in the library, because <stdint.h> is now required to provide intN_t / uintN_t when there is a matching standard or extended integer type, so would be required to provide int128_t / uint128_t, which in turn would require the corresponding <stdint.h> and <inttypes.h> macros, so requiring constant suffixes and printf / scanf support.
