[Bug fortran/46540] New: libquadmath: Implement --disable-libquadmath

[burnus at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46540

           Summary: libquadmath: Implement --disable-libquadmath
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: burnus@gcc.gnu.org


Add this option to build GCC without libquadmath.

That implies:
- No building of libquadmath is self
- No acceptance of REAL(16) (except on long double == 128bit systems) by the
Fortran front end
- No dependence on libquadmath by libgfortran