The IBM Power9 processor adds support for IEEE 754 quad precision 128
binary floating point.  The attached patch from my colleague should
enable the basic support.  musl never has supported the IBM long
double floating point format.  The patch only enables musl long double
support when built with and used with a toolchain that enables IEEE
128 bit FP.

Any suggestions on how to transition this support in musl?

Thanks, David

P.S. A Power9 system now is available in the GNU Compile Farm.