How do we handle the Sun Copyright for derivative works.

[Roland McGrath]

> How do we handle the Sun copyright in glibc code when we patch or 
> copy/modify such code. For example 
> ./sysdeps/ieee754/dbl-64/s_logb.c.
> 
> 1) Leave the Sun (C) and add 2005 date?

One never does this, AFAIK.  

> 2) Leave the Sun (C) and add the LGPL header with 2005 date?
> 3) ?

What's the nature of the change?  If it's small, then my tendency would be
just not to update the Sun copyright.