Single-precision float version of matherr

[Wilco Dijkstra]

Hi Jozef,

> Thanks for the tip.
> I also noticed that other embedded toolchains (for MSP430 at least) do not have
> a similar concept to matherr and instead just rely on errno. Good to hear it
> can be removed altogether.

Well errno is almost as obsolete after C99...

> I presume it's not even worth keeping the old code available through a macro
> such as __OBSOLETE_MATHERR?

Indeed, it won't be missed.

Wilco