[Bug libquadmath/85440] libquadmath and quadmath.h do not exist on ppc64

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85440

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to work|                            |8.0

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
8.0 marks the development versions of the upcoming 8.1, 8.2 etc. releases, 8.0
will never be released itself.

libquadmath is not enabled on sparc64, right now it is just enabled on targets
that have a __float128 or similar type, so i?86, x86_64, ia64 and powerpc*.
sparc64 should have IEEE754 quad support in glibc already, just use long
double.