https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114533

--- Comment #7 from Joseph S. Myers <jsm28 at gcc dot gnu.org> ---
Note also that in glibc, _Float128 support in printf code can only be used in
limited circumstances: either on powerpc64le, as one of the multiple supported
long double formats there, or through the sharing of the printf code with the
implementation of strfromf128.

In particular, there are no glibc printf formats corresponding directly to
_FloatN / _FloatNx types. There was support in principle at the WG14 meeting in
Strasbourg in January for having some form of printf/scanf support for such
types in C2y, but major work is still needed on the wording that was proposed
in N3184.

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