ROOT startup problem

ROOT
1

Hello ROOT Experts,

I have installed ROOT6 on my fedora Linux, and compiled it successfully, but when I start the root and attach a file, a bothering message appear:

[root@dhcp239 Delphes-3.3.2]# root -l analysis_files/4e/signal_500GeV_4e.root root [0] Attaching file analysis_files/4e/signal_500GeV_4e.root as _file0... IncrementalExecutor::executeFunction: symbol '_ZN5cling10printValueEPPKv' unresolved while linking [cling interface function]! You are probably missing the definition of cling::printValue(void const**) Maybe you need to load the corresponding shared library? (TFile *) Error in ValuePrinter: missing output string. root [1]
Could you please help me?

Thank You in Advance

2

Hi,

Indeed worrisome. Which platform exactly (compiler + version, x86_64?), how did you configure ROOT?

Cheers, Axel.

3

Hello Alex,

Thank You for your prompt reply, here is the information:

[root@dhcp239 Delphes-3.3.2]# uname -a Linux dhcp239.ba.infn.it 4.3.3-303.fc23.x86_64 #1 SMP Tue Jan 19 18:31:55 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux [root@dhcp239 Delphes-3.3.2]# gcc --version gcc (GCC) 5.3.1 20151207 (Red Hat 5.3.1-2) Copyright (C) 2015 Free Software Foundation, Inc.

Thank You again

4

Hi,

This is likely because Fedora has switches to the new GCC ABI which clang doesn’t support yet… You can follow sft.its.cern.ch/jira/browse/ROOT-7947 to see when we are done.

Until then please try to build ROOT with an older compiler, or probably simpler: use it in a virtual machine.

Cheers, Axel.

5

Thank You so much