[gfortran] Change libgfortran from scalbn to ldexp

[Tobias Schlüter]

Tobias Schlüter wrote:
> 2004-10-02  Tobias Schlüter  <tobias.schlueter@physik.uni-muenchen.de>
> 
> 	* configure.ac: Check for ldexpf, remove check for scalbnf.
> 	* intrinsics/c99-functions.c (ldexpf): New function.
> 	(nextafterf): Use 'ldexpf' instead of 'scalbnf'.
> 	(scalbnf): Remove.
> 	* m4/set_exponent.m4: Replace 'scalbn' by 'ldexp'.

This doesn't fix the problems on PowerPC, so I don't think this patch is worth it.

- Tobi