Thanks, I'm surprised to see this. Anyway, I don't think it applies here. In the GPLv2 it says
> However, as a special exception, the source code distributed need not include anything that is normally distributed (in either source or binary form) with the major components (compiler, kernel, and so on) of the operating system on which the executable runs, unless that component itself accompanies the executable.
This exception clearly applies to glibc.