Building the manual

[Roland McGrath]

> I thought that came with binutils but I was wrong; on my system it was
> pulled from 4.4.  Try /src/usr.bin/tsort/tsort.c from your favorite
> *BSD mirror.
> 
> I'm open to suggestions on how to do it differently.  We'll distribute
> the file it's used to generate, so it's probably not a major issue.

That makes it not a problem that it's not one of the approved minimal tools
required to simply build libc from the source distribution.  

But it is certainly a problem if developing libc requires some tool that is
not in any standard GNU package.  This state of affairs should not go out
in a public release.

Having tsort added to one of the GNU *utils packages would be a fine solution.