Re: [Gcl-devel] Re: SLIME

[Camm Maguire]

Greetings!

Eric Merritt <address@hidden> writes:

> --- Camm Maguire <address@hidden> wrote:
> > Greetings, and thanks for the reference!
> > 
> > 1) These are not part of the ANSI standard, correct?
> 
>  True,  they were reject from the standard.
> 
> > 2) That being said, I think the public doamin
> > implementation cited
> > will likely compile as is under ansi gcl.  Perhaps
> > we could distribute
> > as a module like the tk interface?
> 
>  It doesn't compile out of the box, but it probably
> wouldn't take an experienced lisper long to get it up
> and running under ansi gcl. 
> 
>  As for distributing it, I have no idea if the fsf
> considers public domain compatable with the gpl/lgpl.
> If they don't have a problem with it then distributing
> it would not be a problem either.
> 

Public domain is completely GPL compatible.

> > 3) Any progress on the sibling call front?  
> 

OK, I've been testing a bit, as you've likely seen from the mails.
The patch is ready to go in if/when 1) I can trace down the ANSI C
stack overflow error reporting difficulty and 2) some kind of sane
default behavior is chosen.  For example, inlining functions, turned
on in -O3, apparently interferes with sibcall optimization.  So should
we default to -O3 -fno-inline-functions?  Even if we discover a
superior way to write the C code to disable an inlining in a particular
call instance, how do we decide what is best?  Perhaps the simplest is
to implement the no-line lisp declaration directly as a gcc function
attribute where gcc is available, contenting ourselves with per
function rather than per call inlining decisions?

>  So I guess the answer is this, tail call optmization
> is usefull and desirably. However, you can do with out
> it. So if it can be implemented in a reasonable amount
> of time with a resonable set of resources its worth
> doing otherwise it may be best to put it on hold until
> more resources are available.
> 

Agreed.  But apparently we can't have everything at once. 

Take care,

> 
>       
>               
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-- 
Camm Maguire                                            address@hidden
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