[cmake-developers] parallel install of different cmake versions

[Orion Poplawski]

On 12/14/2015 08:56 AM, Eric Noulard wrote:
>
>
> 2015-12-14 15:42 GMT+01:00 Brad King <brad.king at kitware.com
> <mailto:brad.king at kitware.com>>:
>
>     On 12/11/2015 06:42 PM, Orion Poplawski wrote:
>     > For Fedora EPEL we often end up packaging newer versions of cmake as cmakeXY
>     > (e.g. cmake34) that can be installed in parallel with the system cmake.  This
>     > is a fairly invasive process.  I'm attaching the current patch I'm working on
>     > for this.  Is there any interest in cmake itself for supporting this kind of
>     > thing?
>
>     Not particularly.  That does look pretty invasive.
>
>     Why not just install it to /usr/lib/cmake34 with normal names and
>     symlink
>     the versioned names?  E.g.
>
>       /usr/bin/cmake34 -> /usr/lib/cmake34/bin/cmake
>       /usr/bin/ctest34 -> /usr/lib/cmake34/bin/ctest
>
>
>
> +1
> Personnally when I installed several version of CMake I do install them
> with a particular prefix and then I use update-alternatives(1) to install
> proper symlinks to the specific location.
>
> I switch from one version to another using update-alternatives(1).
>
> This can certainly be used on Fedora/EPEL as well:
> https://fedoraproject.org/wiki/Packaging:Alternatives

Yes, but this cannot be done in rpm spec files for building other 
packages (as would be done in EPEL).  Perhaps we could leverage 
environment-modules, but this would be a bit of a departure.


-- 
Orion Poplawski
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