On Wednesday 05 April 2006 04:06, Meino Christian Cramer wrote:
>  How can I manage to install qt-4 without cripple the rest of my
>  system (qt-3 based) ?
>
>  Is there a way of parallel installation/usage ? And if so -- how can
>  I manage it "gentoo-like" ?

# emerge -va =qt-4.1.2

These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild  NS   ] x11-libs/qt-4.1.2  USE="...." 27,269 kB 

>From man emerge:
  N = new, (not yet installed)
  S = new, SLOT installation (side-by-side versions)

Of course you can just pick any version. Qt IS slotted so it will not harm 
your system at all. As long as you don't emerge --prune it (which would 
remove the old version).

-- 
Bo Andresen

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