[tree-ssa]New fortran frontend

[Paolo Bonzini]

> > ! The full distribution includes the C, C++, Objective-C, Fortran,
Fortran 95,
> > ! Java, and Ada (in case of GCC 3.1 and later) compilers.  The full
distribution
> > ! also includes runtime libraries for C++, Objective-C, Fortran, Fortran
95, and
> > ! Java.  In GCC 3.0 and later versions, GNU compiler testsuites are also
> > ! included in the full distribution.
>
> Observe that for Ada it says "in case of GCC 3.1 and later".  (The online
> install docs are generated from mainline, but may be used by people
> installing releases.)  Likewise, for Fortran 95, it should probably refer
> to GCC 3.5 and later.

The big difference is that Ada was distributed separately in GCC
3.0/earlier, while Fortran 95 did not exist at all without tree-ssa, that is
before GCC 3.5.

Paolo