Re: newlib vs C99 math functions

[mwoehlke <mwoehlke at tibco dot com>]

Christopher Faylor wrote:
> On Thu, Aug 10, 2006 at 03:49:01PM -0500, mwoehlke wrote:
> > Christopher Faylor wrote:
> > > On Thu, Aug 10, 2006 at 02:35:44PM -0500, mwoehlke wrote:
> > > > Andrew Pinski wrote:
> > > > > While porting some code over to use newlib from a closed source libc,
> > > > > I ran into the problem of that newlib did not implement most of the
> > > > > C99 math functions or macros.  I ran into the problem that FP_ILOGB0
> > > > > was not defined and I was wondering if anyone is working on adding any
> > > > > of the C99 math functions to newlib?
> > > > >
> > > > > Also is there a bug system for newlib because it would be great to
> > > > > file bugs about the problems I ran into.
> > > > >
> > > > > Thanks,
> > > > > Andrew Pinski
> > > > Well, newlib's printf() does not support "%a"/"%A" which are required by 
> > > > C99, so my observation of the C99 support at least is "spotty at best".
> > > >
> > > > Meanwhile, I'll wait anxiously to see you get any more attention from 
> > > > the 'official' folks than I've gotten so far.
> > > http://isbn.nu/0671723650
> > Meh :-D
> > (You know, I think we're going to get a lot of mileage out of that...)
>
> You know it will only be a short matter of time before that is directed
> at me, right?  :-)

Ouch, you're right... my condolences, in advance. :-)
This would be a little past the TITTTL point, but I can't seem to find 
newlib-talk ;-)

> > I apologize for getting used to the promptness of Cygwin's list. This 
> > one *does* seems dead by comparison.
> >
> > Now that we know you're here, do you know if anyone is working on adding 
> > C99-conformance to newlib? ;-)
>
> I don't think that newlib has a roadmap.  Any changes would come from
> either contributions or talking very nicely to Jeff.  Since newlib isn't
> Jeff's full-time job, I would imagine that adding major new
> functionality won't be high on his to-do list.

If there is a list, "%a" in printf/etc would be nice, but I have no need 
of it now or in the foreseeable future. I mainly point it out because it 
looks like that is the only thing missing from printf-and-friends for 
C99 conformance.

Not sure if I can help Andrew; if they were macros I'd say borrow from a 
compatible open-source libc (like, say, glibc) and offer a patch, but I 
see he also mentioned missing functions; those are a little more 
complicated to add.

--
Matthew
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