pkg question

[Walter Hurry]

Quoting from /usr/ports/UPDATING:
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20130502:
  AFFECTS: users of ports-mgmt/pkg, ports-mgmt/poudriere, ports-mgmt/
tinderbox
  AUTHOR: bdrewery at FreeBSD.org

This only affects people who are _building_ binary packages for pkgng. If 
you are building from ports please ignore this. This step is optional.

It is recommended to rebuild all packages and then have your users run 
'pkg check -Ba' and 'pkg upgrade' on their servers once. This will allow 
the new shlib tracking to reinstall packages that have changed shlib 
requirements.
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Does 'rebuild all packages' mean we have to recompile from scratch, or 
merely do a 'pkg create' for each?