correctly rounded mathematical functions

[Paul Zimmermann]

       Hi Keith,

> Yeah, I've forked newlib into 'picolibc' and have removed all of the
> non-BSD licensed files to make the license status of that project
> clearly BSD only. All of the non-BSD files are used to build the library
> only for specific targets; the general library code is all BSD licensed.
> 
> Something BSD-ish would preserve the license status of newlib built for
> embedded targets, and would also be usable by picolibc.

then I guess the MIT license would be ok for both newlib and picolibc,
since it is more permissive than the BSD license.

Best regards,
Paul