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From:  Nikos Chantziaras <realnc@arcor.de>
Subject: [gentoo-user]  Re: emerge --oneshot gcc-4.1.2
Date:  Sat, 02 May 2009 20:34:02 +0300
Organization:  Lucas Barks
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Hung Dang wrote:
> Hi all
> I have to emerge gcc-4.1.2 to use with CUDA. However, I receive the 
> following message.
> 
> !!! 'gcc-4.1.2' is not a valid package atom.
> !!! Please check ebuild(5) for full details.
> 
> What should I do to avoid of this problem?

Try:

   emerge --oneshot =gcc-4.1.2

(that is, you need an "=" in front.)

Or simply just:

   emerge --oneshot gcc

if you're not using an ~arch ("testing") GCC.