forcing tail/sibling call optimization

[Bernd Schmidt]

On Mon, 27 Nov 2000, Fergus Henderson wrote:

> Implementation Advice:
> 	Implementations should implement tail call statements in such
> 	a way that all storage for the invocation of the calling
> 	function is reclaimed by the time execution transfers to the
> 	callee function.
> 
> Implementation Requirements:
> 	Implementations shall issue a warning if there are any tail call
> 	statements for which the implementation is unable to follow
> 	the implementation advice.

Whether all storage can be reclaimed is potentially machine dependent.
This means that the warning will not be very useful; relying on it will
lead to nonportable code.


Bernd