Re: [PATCH] In _IEEE_LIBM mode, use weak symbols instead of wrapper funcs [v2]

"Keith Packard" <[email protected]> Tue, 25 Sep 2018 09:53:03 -0700

Newsgroups	gmane.comp.lib.newlib
Message-ID	<[email protected]>

Wilco Dijkstra <[email protected]> writes:

> I didn't say completely remove POSIX errno support. The new math
> functions do have POSIX errno support and are equally space and
> performance efficient whether you want errno or not (currently it uses
> WANT_ERRNO but it could check _IEEE_LIBM too).

This is the code enabled with __OBSOLETE_MATH set to 0? That seems to be
disabled on smaller ARM processors without HW double support? I haven't
been looking at it because I wasn't getting to use it. Is this supposed
to be something configurable when building the library? I can't see any
way to get it forced to zero.

> Note also that most of the math functions won't ever be used by embedded applications.
> So we only need to consider the commonly used math functions - the new math functions
> cover most of those already.

If I'm supposed to be using the new math code (and it sure looks like I
want at least some of it), then yes, this would be a good option.

-- 
-keith

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