To enable the EMCAL jet trigger you need to

0) install FastJet and define $FASTJET
1) rename the CMakelibAliHLTFJW.pkg.noFJ in CMakelibAliHLTFJW.pkg this will build the FastJet library
2) uncomment the line with # AliHLTTriggerFastJet.h in CMakelibAliHLTTrigger.pkg
3) eneble the corresponding pragma directive in trigger/AliHLTTriggerLinkDef.h
4) uncomment the lines
//#include "AliHLTTriggerFastJet.h"
//pHandler->AddComponent(new AliHLTTriggerFastJet);
in trigger/AliHLTTriggerAgent.cxx

problems questions
"Federico Ronchetti" <federico.ronchetti@gmail.com>
"Leonidas Xaplanteris" <leonidas.xaplanteris@gmail.com>