Alternate install prefixes

[Orion Poplawski]

I'm looking at packaging up cmake 3.4 for EPEL7 as cmake34 much like we 
did with cmake 2.8 in EPEL6 as cmake28.  Generally what we've done in 
the past is still install into the normal paths and rename binaries & 
directories asneeded.  With cmake this is quite tricky and requires an 
invasive patch.

It would be much easier to install into a different prefix and then 
symlink to /usr/bin/cmake34 - although I still have some doubts as to 
whether this would work or not - cmake seems to want to still spawn 
"cmake" which would use the system version (or not be found).  One might 
also be able to use environment-modules, though this would require more 
modification to spec files.

See https://bugzilla.redhat.com/show_bug.cgi?id=1290199 for some more 
details.

Thoughts?

[Karel Volný]

Hi,
> I'm looking at packaging up cmake 3.4 for EPEL7 as cmake34 much

...
> Thoughts?

well, maybe I'm overlooking something but ... isn't this what software 
collections[*] had been designed for?

K.

[*] https://www.softwarecollections.org/

[Kevin Fenzi]

On Thu, 24 Dec 2015 20:15:43 +0100
Karel Volný  wrote:
> Hi,
> > I'm looking at packaging up cmake 3.4 for EPEL7 as cmake34 much
>
> ...
> > Thoughts?
>
> well, maybe I'm overlooking something but ... isn't this what
> software collections[*] had been designed for?

Possibly. However, there's no completed guidelines for SCL's in Fedora
and thus also EPEL, so they cannot be used by Fedora or EPEL.

kevin

[Honza Horak]

On 12/26/2015 09:51 PM, Kevin Fenzi wrote:
> On Thu, 24 Dec 2015 20:15:43 +0100
> Karel Volný  wrote:
> > Hi,
> > > I'm looking at packaging up cmake 3.4 for EPEL7 as cmake34 much
> >
> > ...
> > > Thoughts?
> >
> > well, maybe I'm overlooking something but ... isn't this what
> > software collections[*] had been designed for?
>
> Possibly. However, there's no completed guidelines for SCL's in Fedora
> and thus also EPEL, so they cannot be used by Fedora or EPEL.

However, nobody is blocked to build SCLs in copr (for Fedora or EPEL), 
which wouldn't be available in EPEL though, which I expect was the 
original purpose. But would be available for people using EPEL at least.

Honza