= 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: lhapdf5.9.1.tgz

* Untar the tarball with the command: `tar xzf lhapdf5.9.1.tgz`. Normally a lhapdf591 folder must be created on your disk.

* Create a folder where the final production of the LHAPDF building will be put: `mkdir lhapdf`

* Go to lhapdf591 and configure the package: `cd lhapdf591; ./configure --nopythext --shared-enabled --static--enabled --prefix=<absolute path of lhapdf>` where <absolute path of lhapdf> is the absolute path of lhapdf. 

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

* Configure the environment variables: `export LHAPDF=<absolute_path_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/shared; lhapdf-getdata CTEQ6L1.LHgrid`. The full list of CTEQ can be found here: `lhapdf-getdata --list`

== Protos 2.2 installation ==

* Download the tarball:

* Untar the tarball

* Apply the patch

* Launch make