On Tue, 22 Apr 2008 15:18:31 -0700 (PDT), Terence
<spamtrap@[EMAIL PROTECTED]
> wrote:
> On Apr 22, 5:42 pm, Josef Moellers <spamt...@[EMAIL PROTECTED]
> wrote:
>
> >.... But I recall that for one, Fortran doesn't sup****t
> > recursion, and, as Robert pointed out, not all early machines had a
> > proper stack, parameters might be passed in a fixed location.
> >
> > The best thing to do would be to compile a Fortran program and look at
> > the object code.
> >
For the particular compiler(s?), and possibly options, of interest.
>
> Oh NO!, Fortran DOES sup****t recursion!
Since 1990, but it's still not the default. Compilers legally _can_
still use single-copy (static) storage for routines not attributed
RECURSIVE. But since most CPUs nowadays sup****t stack access at least
as efficient as static, there's rarely any longer a benefit to it.
Also variables declared with initialization are implicitly attributed
(also) SAVE, meaning single-copy even in a RECURSIVE routine. To have
'local' (per invocation) variables, you must use assignment instead.
This is a FAQ on c.l.fortran.
- formerly david.thompson1 || achar(64) || worldnet.att.net
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