Re: install/45335: postinstall: obsolete libs: use distribution sets

[David Holland <dholland-bugs%netbsd.org@localhost>]

The following reply was made to PR install/45335; it has been noted by GNATS.

From: David Holland <dholland-bugs%netbsd.org@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: 
Subject: Re: install/45335: postinstall: obsolete libs: use distribution sets
Date: Mon, 7 Oct 2013 05:24:15 +0000

 On Thu, Mar 01, 2012 at 09:15:05AM +0000, Martin Husemann wrote:
  >> IMO, for NetBSD controlled directories (i.e. /lib, /usr/lib)
  >> deleting everything which isn't in the distribution's mtrees
  >> should be fine, shouldn't it?
  >  
  >  You need to leave around, for each shared library, for each major
  >  present the lib with the highest minor.
 
 The problem is that if you try to revert from a version that has
 libfoo.so.5.10 to a version that has libfoo.so.5.5, you'll end up
 retaining libfoo.so.5.10 and it might not work. (In the case of libc,
 for example, a -current libc and a -6 kernel definitely won't work
 together.)
 
 ISTM that this is a real concern.
 
 -- 
 David A. Holland
 dholland%netbsd.org@localhost