prelinking and mounting /usr read-only

[Robert P. J. Day]

   ok, only a few months behind the curve but i took a look at 
prelinking and, given that it actually modifies ELF shared and 
dynamically linked libs, my first concern would be that, technically, 
wouldn't those libs now fail an RPM verification test?  after all, if 
they're no longer identical to the installed files, doesn't that 
constitute a verification failure?

   also, as i mentioned, according to the FHS 
(http://www.samba.org/~cyeoh), /usr should be mountable read-only.  if 
prelinking is run on a regular basis, that would make that pretty 
difficult.  *but*, if you're determined to mount /usr read-only, that 
suggests that you've done all your installation for the time being, 
you're happy with the current setup, and you don't plan on modifying 
the installed software in the immediate future.

   if that's the case, wouldn't you just run prelink, then remount /usr 
as RO and turn off prelinking?  after all, if nothing's going to 
change in the executables or libs, there's no point re-running 
prelink, is there?  it has everything it needs, at least until the 
next time you need to mess with your software.

   thoughts?

rday