https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109758
--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to g.peterhoff from comment #5) > >> Again, what do you mean by "quadmath"? > > __float128 https://github.com/gcc-mirror/gcc/tree/master/libquadmath Well that's even more confusing/confused :-) Those are two separate things. __float128 is a built-in type provided by the compiler, and libquadmath is a library. The __float128 type can be used completely independently of libquadmath. Libstdc++ has some support for the __float128 type, but it does not use libquadmath. There is no "quadmath" in <bits/std_abs.h> or anywhere else in libstdc++, just plain uses of the __float128 type.
