Setting new root version as default

ROOT
#1

Hello,

I’m trying to update my ROOT version on my linux ubuntu VM.
I have several versions available, but can not seem to set the one I wish as default i.e.:
current version: ROOT/5.34.26/x86_64-slc6-gcc48-opt/root/bin/root

And I want to set this as default when I open/use root:
ROOT/6.06.08/x86_64-slc6-gcc49-opt/root/bin/root

I am new to both ROOT and linux, thanks in advance!

#2

Something like that should work:

. ROOT/6.06.08/x86_64-slc6-gcc49-opt/root/bin/thisroot.sh
#3

The command seem to have worked, but now root wont open, when I type root in terminal:
“root: /cvmfs/sft.cern.ch/lcg/external/gcc/4.8.1/x86_64-slc6/lib64/libstdc++.so.6: version `CXXABI_1.3.8’ not found (required by root)”

Did I assume wrongly that the version was available since it is shown in the directory?

#4

It looks like the command did not set the environment variables correctly. What is the value of $ROOTYS after you sourced this script ?

#5

slc6 is for “Scientific Linux CERN 6” linux distribution, not Ubuntu.
You need to use Ubuntu-compatible version of root binaries.
ROOT 5 for SLC6 may have worked in Ubuntu, but ROOT 6 is unlikely to work this way.

#6

I checked my version - my bad!

I do actually run SLC.

#7

doing echo $ROOTSYS and it says:
/cvmfs/sft.cern.ch/lcg/app/releases/ROOT/6.06.08/x86_64-slc6-gcc49-opt/root

#8

You’ve loaded the x86_64-slc6-gcc49-opt version of ROOT, but you have gcc 4.8.1 active.
Try to . /cvmfs/sft.cern.ch/lcg/external/gcc/4.9.1/x86_64-slc6/setup.sh.

#9

Thanks alot, this worked!

#10

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