= Protos installation =

Protos can be installed in 2 steps. First, you need to install an old release of LHAPDF (5.*.* not 6.*.*) and download the PDF sets that you would like to use. Second, you must proceed to the Protos installation.

== LHAPDF 5.9.1 installation ==

* Download the tarball: [https://madanalysis.irmp.ucl.ac.be/raw-attachment/wiki/ProtosInstallation/lhapdf-5.9.1.tar.gz lhapdf-5.9.1.tar.gz]

* Untar the tarball with the command: `tar xzf lhapdf-5.9.1.tar.gz`. Normally a `lhapdf-5.9.1` folder must be created on your disk.

* Create somewhere in your disk a folder where the final production of the LHAPDF building will be put: `mkdir lhapdf`. The absolute path of `lhapdf` will be named in the following `<absolute path of lhapdf>`.

* Enter the folder `lhapdf-5.9.1`: `cd lhapdf-5.9.1`

* Configure the package installation: `./configure --disable-pyext --enable-shared=yes --enable-static=yes --prefix=<absolute path of lhapdf>` 

* Launch the building and cross the fingers :-): `make` then `make install` 

* Configure the environment variables: 
   * `export LHAPDF=<absolute path of lhpadf>`
   * `export PATH=$PATH:$LHAPDF/bin`
   * `export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$LHAPDF/lib`

* Install PDF sets. This is a example of CTEQ6L1: `cd $LHAPDF/share/lhapdf; lhapdf-getdata cteq6ll.LHpdf`. The full list of available of PDF sets can be found here: `lhapdf-getdata --list`

== Protos 2.2 installation ==

* Download the tarball: [https://madanalysis.irmp.ucl.ac.be/raw-attachment/wiki/ProtosInstallation/Protos22.tar.gz Protos22.tar.gz]

* Untar the tarball

* Apply the patch

* Launch make