On Mon, Oct 26, 2020 at 05:48:48PM -0500, will schmidt wrote: > On Thu, 2020-10-22 at 18:15 -0400, Michael Meissner via Gcc-patches wrote: > > PowerPC: Allow C/C++ to change long double type on GLIBC 2.32. > > > > This is a new patch. It turns off the warning about switching the long > > double > > type via compile line if the GLIBC is 2.32 or newer. It only does this if > > the > > languages are C or C++, since those language libraries support switching the > > long double type. Other languages like Fortran don't have any current > > support > > to provide both sets of interfaces to the library. > > > > 2020-10-21 Michael Meissner <meiss...@linux.ibm.com> > > > > * config/rs6000/rs6000.c (rs6000_option_override_internal): Allow > > long double type to be changed for C/C++ if glibc 2.32 or newer. > > --- > > gcc/config/rs6000/rs6000.c | 10 ++++++++-- > > 1 file changed, 8 insertions(+), 2 deletions(-) > > > > diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c > > index 50039c0a53d..940c15f3265 100644 > > --- a/gcc/config/rs6000/rs6000.c > > +++ b/gcc/config/rs6000/rs6000.c > > @@ -4158,10 +4158,16 @@ rs6000_option_override_internal (bool global_init_p) > > > > if (rs6000_ieeequad != TARGET_IEEEQUAD_DEFAULT && > > TARGET_LONG_DOUBLE_128) > > { > > + /* Determine if the user can change the default long double type at > > + compilation time. Only C and C++ support this, and you need GLIBC > > + 2.32 or newer. Only issue one warning. */ > > > static bool warned_change_long_double; > > - if (!warned_change_long_double) > > + > > + if (!warned_change_long_double > > + && (!OPTION_GLIBC > > + || (!lang_GNU_C () && !lang_GNU_CXX ()) > > + || ((TARGET_GLIBC_MAJOR * 1000) + TARGET_GLIBC_MINOR) < 2032)) > > { > > - warned_change_long_double = true; > > Does this need to be added back elsewhere?
At the present time, we are not contemplating adding the full support to enable configuring GCC to use IEEE 128-bit long double in GCC 10 or earlier. This may change depending on customer demands. -- Michael Meissner, IBM IBM, M/S 2506R, 550 King Street, Littleton, MA 01460-6245, USA email: meiss...@linux.ibm.com, phone: +1 (978) 899-4797