Path for xrdcp

ROOT
1

Hello,

I am setting up ROOT from AFS at CERN following these instructions:

root.cern.ch/drupal/content/prod … ersion-532

With this version, there is no xrdcp in my PATH. What do I need to do to pick up a correct version of xrdcp binary with v5.32?

Thank you,
Rustem

2

Hi Rustem,

Xrootd is now an external package, and is not distributed with root anymore. Tu use xrdcp, you have to add /afs/cern.ch/sw/lcg/external/xrootd/3.1.0p2/x86_64-slc5-gcc43-opt/bin to your PATH and /afs/cern.ch/sw/lcg/external/xrootd/3.1.0p2/x86_64-slc5-gcc43-opt/lib to your LD_LIBRARY_PATH.
(replace “x86_64-slc5-gcc43-opt” by your version if needed)

Cheers, Bertrand.

3

Hi Bertrand,

This worked. Thanks a lot!

Cheers,
Rustem

4

Hello,

I’ve been trying to compile a piece of code that opens a TFile using xrootd. I saw the reply above, but it doesn’t seem to work for me. I’m doing this on lxplus. Any hints would be appreciated.

best regards,
Tae

Here’s my setup:

BUILD=x86_64-slc5-gcc43-dbg export XRDPATH=/afs/cern.ch/sw/lcg/external/xrootd/3.1.0p2/$BUILD export ROOTSYS=/afs/cern.ch/sw/lcg/app/releases/ROOT/5.32.01/$BUILD/root export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$ROOTSYS/lib:$XRDPATH/lib export PATH=$PATH:$ROOTSYS/bin:$XRDPATH/bin

Here’s my code:

#include "TFile.h" int main(int argc, char* argv[]) { TFile * tfile = TFile::Open("root://eosatlas.cern.ch//eos/MYPATH/MYROOT.root"); if (tfile) { printf("%s\n", tfile->GetName()); fflush(stdout); } return 1; }

Here’s my compilation & linking

[code]> g++ -g -O -Wall -fPIC -pthread -m64 -I/afs/cern.ch/sw/lcg/app/releases/ROOT/5.32.01/x86_64-slc5-gcc43-dbg/root/include -c test.cxx

g++ -O -m64 -L/afs/cern.ch/sw/lcg/app/releases/ROOT/5.32.01/x86_64-slc5-gcc43-dbg/root/lib -lGui -lCore -lCint -lRIO -lNet -lHist -lGraf -lGraf3d -lGpad -lTree -lRint -lPostscript -lMatrix -lPhysics -lMathCore -lThread -pthread -lm -ldl -rdynamic -lTMVA -lTreePlayer test.o -o test.exe
[/code]

Here’s the error message

> ./test.exe dlopen error: libstdc++.so.6: version `GLIBCXX_3.4.9' not found (required by libXrdUtils.so.0) Load Error: Failed to load Dynamic link library /afs/cern.ch/sw/lcg/app/releases/ROOT/5.32.01/x86_64-slc5-gcc43-dbg/root/lib/libNetx.so Error in <TPluginHandler::SetupCallEnv>: class TXNetFile not found in plugin Netx

That’s all!

5

You need to set up the compiler environment. For example, if you use bash:

and if you use [t]csh:source /afs/cern.ch/sw/lcg/external/gcc/4.3.2/x86_64-slc5/setup.csh
Cheers, Bertrand.