Many thanks to those who responded to my post:
Tom Erickson
Scott F. Woods
Francois Leclerc
Venkat D
Fischer Jens
Brion Leary
The important man pages are:
First, the relevant man pages for this problem:
pkgadd
packagetoc
clustertoc
swmtool
There were several good suggestions, ranging from a complete reinstall (not
practical in this particular case) to using pkgadd or admintool to add the
specific packages. One person thought that admintool had a single option
to add all of the packages for developer support but I could not find this
option. Instead, I used admintool to add each package individually until I
had all of the tools, headers, etc. needed to compile programs.
One excellent piece of advice was to check the root of the cdrom with ls -l
to find two text files called .packagetoc and .clustertoc which describe
packages & clusters contents. These can then be added manually. While I
didn't take this route, it was *very* good to learn about the existence of
these files!
Thanks again!
Joel