https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67419
--- Comment #6 from Francois-Xavier Coudert <fxcoudert at gcc dot gnu.org> ---
(In reply to r...@cebitec.uni-bielefeld.de from comment #4)
>> 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
OK, then it's definitely not Fortran-specific. The question is: is it just
because of GCC's built-in handling (e.g., because the math.h header does
something weird), or is it simply that the libm's sqrtl() is unusable?
