sPHENIX discussion of software

[pinkenburg <pinkenburg AT bnl.gov>]

Hi folks,

as announced in the software and general meeting - we will switch to the 
new gcc 12 compiler NOW. It is changing the softlink where /opt/sphenix 
points to but this needs to propagate through the cvmfs caches. Given 
this is an rsync from the top level of our multiple TB sized cvmfs 
volume this might take a while. Once this happened

source /opt/sphenix/core/bin/sphenix_setup.sh -n

will set you up with gcc 12. Old binaries compiled with gcc 8 should 
still be usable but I wouldn't recommend trying this. Please wipe your 
install and build areas and recompile the show using gcc 12. gcc 12 is 
more picky in terms of warnings, if you run into issues let me know on 
our Mattermost help channel:

https://chat.sdcc.bnl.gov/sphenix/channels/sphenix-software-help

You can still run the gcc 8 version if you want to, the daily builds 
will continue for the time being (probably until ACTS is upgraded to a 
version which doesn't compile with gcc 8 anymore), but I would urge you 
to switch asap. To get the gcc 8 setup you need to source the setup 
script using the full path:

source 
/cvmfs/sphenix.sdcc.bnl.gov/gcc-8.3/opt/sphenix/core/bin/sphenix_setup.sh -n

Just like you can use the full path right now to setup gcc 12:

source 
/cvmfs/sphenix.sdcc.bnl.gov/gcc-12.1.0/opt/sphenix/core/bin/sphenix_setup.sh 
-n

Nothing else has changed in terms of running the show (same setup_local 
script you need to run to add your own installation) - if you encounter 
problems, let me know (via Mattermost)

Let's do this
Chris

--
*************************************************************

Christopher H. Pinkenburg       ;    pinkenburg AT bnl.gov
                                ;    http://www.phenix.bnl.gov/~pinkenbu

Brookhaven National Laboratory  ;    phone: (631) 344-5692
Physics Department Bldg 510 C   ;    fax:   (631) 344-3253
Upton, NY 11973-5000

*************************************************************