https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79430
--- Comment #42 from Thomas Koenig <tkoenig at gcc dot gnu.org> --- Using ./configure --with-precision=extended results in checking whether gfortran supports c_float128 (a gfortran extension)... yes checking the requested floating point precision... extended configure: error: *************************************************************************** configure: error: the requested default real kind 'extended' is not available in this environment configure: error: ***************************************************************************
