[Bug fortran/31202] Incorrect rounding generated for NINT

[FX Coudert]

> [I resending this to you, since I noticed you are not CC:ed in the PR,
> and I do not know if you are following gcc-bugs@gcc.gnu.org...]

I received the mail because I was assigned to that PR... but anyway,  
thanks for the report!

> NetBSD does not have lroundl (and not roundl, so lroundl is not  
> added by
> intrinsics/c99_functions.c) with the result that linking with  
> libgfortran
> fails with "undefined reference to `lroundl'".

I have also introduced a roundl() fallback, but it depends on ceill()  
being available. Now, what rounding long double functions does i386- 
netbsd have? Does it have nextafterl?

Thanks,
FX