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Date: Fri, 18 Jan 2013 07:55:46 -0700 (MST)
From: Warren Block <wblock@wonkity.com>
To: Ralf Mardorf <ralf.mardorf@alice-dsl.net>
Subject: Re: Dependencies after port tree update
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On Fri, 18 Jan 2013, Ralf Mardorf wrote:

> I had to do a "portsnap fetch update" to compile icedtea-web and run into a 
> dependency hell. Most apps can't be launched anymore. When I deinstall, 
> recompile the new versions and install them, I have tons of dependencies for 
> each app.

portsnap fetch update just updates the ports tree.  It's when you build 
new ports or update old ones that problems can arise.  A short article 
on port upgrading: 
http://www.wonkity.com/~wblock/docs/html/portupgrade.html

> Is there a way to automatically recompile all broken apps and dependencies?

Depends on what you mean by broken, but portmaster and portupgrade are 
both made to deal with that.  pkg_libchk from sysutils/bsdadminscripts 
is very useful for finding ports that still depend on old, missing 
libraries and need to be rebuilt.