A question regarding old libs and uninstall all old libs

lk42pro

I would like to know if a package has a dependency say Qt2 and I have Qt3 installed...does that mean
1. I don't have to install the dependency or
2. It will only work by installing Qt2?

also can anyone tell me whats the best way to uninstall all the old packages and somehow emerge --update world and fix all the dependencies again? so i can just run that over 1 night or something...
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Syntaxis · Guru Joined: 28 Apr 2002 Posts: 511 Location: London, UK

Depends on the package.
You have to install Qt2 to have the Qt2 apps working. But for most libs, you just need greater than a certain version. There are always milestones which break backwards-compatability, though.
The easiest way to uninstall all old packages is "emerge --clean world". But apparently some stuff can still break.
Do "emerge --clean world; emerge --update world", go to bed... and keep your fingers crossed! :-)

Or this post shows another way you might do it: https://forums.gentoo.org/viewtopic.php?t=1728&highlight=build+options&sid=5ae854091e6136947a0ae8829c4c83f2

lk42pro · Posted: Sun May 05, 2002 9:00 pm Post subject:

Syntaxis · Guru Joined: 28 Apr 2002 Posts: 511 Location: London, UK

Cool, I didn't know about pkg-clean (makes a note) :-)

Nope, "emerge --clean world" removes the actual packages, not the ebuilds.

lk42pro · Posted: Mon May 06, 2002 1:26 am Post subject:

lk42pro · Posted: Mon May 06, 2002 1:28 am Post subject:

Syntaxis · Guru Joined: 28 Apr 2002 Posts: 511 Location: London, UK

--pretend doesn't seem to work in conjunction with --update or --clean, don't ask me why.
It's kind of a leap into the dark :-)

lk42pro · Posted: Mon May 06, 2002 2:29 pm Post subject: