correct settings on SL5/6 (compilation/gfortran_read_write/lhapdf/... issues)

Created by marco zaro
Keywords:
SL5 SL6 lhapdf gfortran_read_write

In case of problems on SL5/6 machines, please check out the following link

http://amcatnlo.web.cern.ch/amcatnlo/list_detailed2.htm#dependencies

where the correct settings is explained (in particular for CERN lxplus)