https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67419
--- Comment #4 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot
Uni-Bielefeld.DE> ---
> --- Comment #3 from Francois-Xavier Coudert <fxcoudert at gcc dot gnu.org> ---
> (In reply to r...@cebitec.uni-bielefeld.de from comment #2)
>> The result is identical for both the mainline libgfortran.so.3 and the
>> bundled gcc 4.8 libgfortran.so.3, so this might well be a libm bug
>> introduced in Solaris 12.
>
> What if you compile the following C source (with "gcc -lm") and run it?
>
> int main (void)
> {
> long double x;
> x = 789.1356;
> __builtin_printf ("%.30Lg\n", x);
> __builtin_printf ("%.30Lg\n", __builtin_sqrtl(x));
> }
I get
789.13559999999995397956809029
-NaN
Rainer
