We’ll assume here you do the tutorial on a CERN-like SLC6 machine,
lxplus. There’s nothing special about this setup, but
it’s simply the easiest way to establish a uniform environment
for a tutorial and make sure that everything works.
One downside of
lxplus is the lack of good git GUIs, so it’s
also possible to do all git operations on a more convenient
platform (like your laptop) and just use an SLC6 machine to
run compilation - this can be done with an
your git checkout, or you could run a local SLC6
Make sure you run
asetupin the directory which contains
athena/, and not inside the repository directory itself as running it inside
athena/can cause problems with CMake e.g.
undefined reference to pthread_create.This is discussed in more detail in the `Git tips’ section.
If you are using git for the first time, it is important to set your git name and email address which will be used by git as author for your commits (if you do not specify someone else explicitly). Failure to do this properly may cause problems when you try to push to an internal or private git repositories hosted on the CERN GitLab server. You can check that your name and email address are properly set by running
git config --list
user.email. If it is not yet set, please run the following commands (which set the information for all your git repositories on lxplus):
git config --global user.name "Your Name"
git config --global user.email "email@example.com"
There are two other setting that we recommend as well:
git config --global push.default simple
git config --global http.postBuffer 1048576000
git config --global http.emptyAuth true # Required on CC7
push setting makes some operations more straightforward. The
second addresses an issue
with large pushes via plain http or krb5. The third addresses an issue with libcurl and krb5.