[RFC] Full float128, third iteration

[FX]

> Now, libquad builds[*] OB on Cygwin :-)

Thanks for the feedback.

> Just a question: Should we use a recent GCC also for the last step ('Patch GCC, configure it with --with-quad=/foo')? I forgot to use CC='gcc-4.6' ./configure... and I am building with gcc-4.3.4 :(

No, as usual you can build GCC itself with whatever compiler you have around.

FX