stupid question about -rf upgrades

[Brian Gruber]

Every once in a while (like this week with gettext) a
library with a very large number of dependencies has a
shared library version bump, and a note is placed in
UPDATING requesting that users do something like

portupgrade -rf gettext

But if I'm using portupgrade, isn't this unnecessary?
doesn't pkg_deinstall (and by extension portupgrade)
preserve old shared libraries just to avoid this? what
am i missing? why do i need to recompile half my
system?

thanks,
/b


 
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