With Devtoolset 3 TUV made it part of Software Collections vs having it be 
its own product.   So you need the softwarecollections repo rpm.

ftp://ftp.scientificlinux.org/linux/scientific/6x/external_products/softwarecollections/yum-conf-softwarecollections-1.0-1.el6.noarch.rpm


--

Connie J. Sieh
Computing Services Specialist III

Fermi National Accelerator Laboratory
630 840 8531 office

http://www.fnal.gov
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On Tue, 3 Nov 2015, Ken Teh wrote:

> I dont seem to be able to install devtoolset-3 on an sl6x x86_64 system.
> I've done it successfully with devtoolset-2 on an i686 system.  My
> procedure is
>
> 1. Wget the yum-conf-devtoolset rpm and install it.
>
> 2. Then, when I do a
>
>       # yum --enablerepo=devtoolset install devtoolset-3-toolchain
>
> it just comes back and says no such available package.  Though the
> package is listed clear as day on the mirror.
>
>
> I've tried this on 2 different systems and the result is the same.  I'm
> baffled.  What am I missing?
>
> Thanks.
>