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1. Download CLHEP 2.0.4.6 from
2. There are 3 2 packages which have been split off CLHEP but are still needed by Geant4:  HepMC, HepPDT, StdHep
3. Obtain HepMC 2.06.00 from https://savannah.cern.ch/projects/hepmc//
   1. Run configure from the CLHEP directory:
      ../HepMC-2.06.00/configure --prefix=/afs/slac/g/glast/ground/GLAST_EXT/rhel4_gcc34/CLHEP/2.0.4.6/ --enable-gmake --with-CLHEP=/afs/slac/g/glast/ground/GLAST_EXT/rhel4_gcc34/CLHEP/2.0.4.6 --with-momentum=MEV --with-length=MM
   2. make
   3. make check
   4. make install
4. Obtain HepPDT from http://lcgapp.cern.ch/project/simu/HepPDT/download/
   1. Run configure from the CLHEP directory
   2. make
   3. make check
   4. make install
   Obtain StdHep from

1.9.4.2

These are instructions for building CLHEP 1.9.4.2 for the various OSes supported.

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