// Silly macro that loads the libraries related 
// to the specific software release that is being 
// used

// The macro returns 0 if successful (files exist), 
// a number otherwise.

/*
 options commonly used:
EngineeringModel-v6r070329p17
BeamtestRelease-v2r0903p0
BeamtestRelease-v3r0907p2
*/

Int_t LoadLibraries(char* softrelease="")
{

  TString MainPath2Software = "/nfs/farm/g/glast/u09/builds/rh9_gcc32opt/";
  TString ThisSoftRelease(softrelease);

  // Check softrelease specified. If null use the default one
  // BeamtestRelease-v3r0907p2

  if(ThisSoftRelease.IsNull())
    {
      cout << endl << "WARNING" << endl
	   << "No softrelease was specified as argument of this macro" 
	   << endl << "The default softrelease version will be used." 
	   << endl << "Default softrelease version: BeamtestRelease-v3r0907p0"
	   << endl << endl;
      
      ThisSoftRelease = "BeamtestRelease-v3r0907p2";
    }

  TString SoftType(ThisSoftRelease);
  SoftType.Remove(ThisSoftRelease.Index("-v",2,0));

  MainPath2Software+= SoftType;
  MainPath2Software+= "/";
  MainPath2Software+=  ThisSoftRelease;
  MainPath2Software+= "/lib/";
  
  cout << "GLAST libraries loaded from: " << endl <<  MainPath2Software << endl;

  
  TString libcommonRootData(MainPath2Software);
  libcommonRootData += "libcommonRootData.so";
  
  TString libmcRootData(MainPath2Software);
  libmcRootData += "libmcRootData.so";

  TString libdigiRootData(MainPath2Software);
  libdigiRootData += "libdigiRootData.so";

  TString libreconRootData (MainPath2Software);
  libreconRootData += "libreconRootData.so";
    

  // libraries from root 
  // They will be loaded from
  // $ROOTSYS/lib directory
  // THEREFORE, IT IS MANDATORY THAT THE ROOT 
  // VERSION IS THE RIGHT ONE...

  if(gSystem->Load("libPhysics.so") < 0){
    cout << "Problems loading libPhysics.so" << endl
	 << "Exiting macro returning -1" << endl;
    return -1;}


  // Libraries from glast software package

  if(gSystem->Load(libcommonRootData.Data()) < 0){
    cout << "Problems loading " << libcommonRootData.Data() << endl
	 << "Exiting macro returning -1" << endl;
    return -1;}

  if(gSystem->Load(libmcRootData.Data()) < 0){
    cout << "Problems loading " << libmcRootData.Data() << endl
	 << "Exiting macro returning -1" << endl;
    return -1;}
  

  if(gSystem->Load(libdigiRootData.Data()) < 0){
    cout << "Problems loading " << libdigiRootData.Data() << endl
	 << "Exiting macro returning -1" << endl;
    return -1;}
  
  if(gSystem->Load(libreconRootData.Data()) < 0){
    cout << "Problems loading " <<libreconRootData.Data()  << endl
	 << "Exiting macro returning -1" << endl;
    return -1;}


  // All libraries could be loaded

  return 0;


}