Set-up

The main modalities which we will use to execute the examples presented in this session, as well as to do the exercises assigned will be the use of a CMSSW enviornment in the CMS-LPC cluster, and a local compiler. Use whichever one is most convenient for you to use. If, however, you find that neither of these work for you in time for the session, as a last resort, you can also use the C++ Shell website. This options has its limitations in that it cannot make use of user made header files, but it will suffice for most of the material presented.

CMS-LPC Cluster

Add the following to your ~/.ssh/config file

Host cmslpc-*.fnal.gov
    StrictHostKeyChecking no
    UserKnownHostsFile /dev/null

and log into the LPC cluster. Once there, run the following commands

mkdir nobackup/PURSUE-CPP
cd nobackup/PURSUE-CPP
cmsrel CMSSW_12_4_19
cd CMSSW_12_4_19/src/
cmsenv
git clone git@github.com:roy-cruz/PURSUE-cpp.git
cd PURSUE-cpp

To test that everything is working, compile and run helloworld.cpp.

cd examples_cpp
g++ helloworld.cpp -o helloworld
./helloworld

If you get the following output, you are ready to go!

Hello World

Local

Your machine should already have the CPP compiler. To make sure that this is the case, run g++. If it complains about the command not being found, run the following to install it (assuming you are using AlmaLinux9):

sudo yum install gcc-c++

Next, clone this repository

git clone git@github.com:roy-cruz/PURSUE-cpp.git
cd PURSUE-cpp

and test that everything is working by compiling and running helloworld.cpp.

cd examples_cpp
g++ helloworld.cpp -o helloworld
./helloworld

If you get the following output, you are ready to go!

Hello World