Bug when installing Delphes in a clean environment

[Viesturs]

I install Delphes outside LXPLUS as described in ​https://github.com/delphes/delphes

At step "make" I see bugs at validation/DelphesValidation.cpp

validation/DelphesValidation.cpp:1196:109: error: invalid use of incomplete type ‘class TF1’
 1196 |   TF1 *f1 = new TF1("f1", "gaus", hist->GetMean() - 2 * hist->GetRMS(), hist->GetMean() + 2 * hist->GetRMS());
      |                                                                                                             ^
In file included from validation/DelphesValidation.cpp:32:
/home/v/root/include/TGraph.h:36:7: note: forward declaration of ‘class TF1’
   36 | class TF1;
      |       ^~~
validation/DelphesValidation.cpp:1199:37: error: invalid use of incomplete type ‘class TF1’
 1199 |   TF1 *f2 = new TF1("f2", "gaus", f1->GetParameter(1) - 2 * f1->GetParameter(2), f1->GetParameter(1) + 2 * f1->GetParameter(2));
      |                                     ^~
In file included from validation/DelphesValidation.cpp:32:
/home/v/root/include/TGraph.h:36:7: note: forward declaration of ‘class TF1’
   36 | class TF1;
      |       ^~~
validation/DelphesValidation.cpp:1199:63: error: invalid use of incomplete type ‘class TF1’
 1199 |   TF1 *f2 = new TF1("f2", "gaus", f1->GetParameter(1) - 2 * f1->GetParameter(2), f1->GetParameter(1) + 2 * f1->GetParameter(2));
      |                                                               ^~
In file included from validation/DelphesValidation.cpp:32:
/home/v/root/include/TGraph.h:36:7: note: forward declaration of ‘class TF1’
   36 | class TF1;
      |       ^~~
validation/DelphesValidation.cpp:1199:84: error: invalid use of incomplete type ‘class TF1’
 1199 |   TF1 *f2 = new TF1("f2", "gaus", f1->GetParameter(1) - 2 * f1->GetParameter(2), f1->GetParameter(1) + 2 * f1->GetParameter(2));
      |                                                                                    ^~
In file included from validation/DelphesValidation.cpp:32:
/home/v/root/include/TGraph.h:36:7: note: forward declaration of ‘class TF1’
   36 | class TF1;
      |       ^~~
validation/DelphesValidation.cpp:1199:110: error: invalid use of incomplete type ‘class TF1’
 1199 |   TF1 *f2 = new TF1("f2", "gaus", f1->GetParameter(1) - 2 * f1->GetParameter(2), f1->GetParameter(1) + 2 * f1->GetParameter(2));
      |                                                                                                              ^~
In file included from validation/DelphesValidation.cpp:32:
/home/v/root/include/TGraph.h:36:7: note: forward declaration of ‘class TF1’
   36 | class TF1;
      |       ^~~
validation/DelphesValidation.cpp:1199:127: error: invalid use of incomplete type ‘class TF1’
 1199 |   TF1 *f2 = new TF1("f2", "gaus", f1->GetParameter(1) - 2 * f1->GetParameter(2), f1->GetParameter(1) + 2 * f1->GetParameter(2));
      |                                                                                                                               ^
In file included from validation/DelphesValidation.cpp:32:
/home/v/root/include/TGraph.h:36:7: note: forward declaration of ‘class TF1’
   36 | class TF1;
      |       ^~~
validation/DelphesValidation.cpp:1202:20: error: invalid use of incomplete type ‘class TF1’
 1202 |   Double_t sig = f2->GetParameter(2);
      |                    ^~
In file included from validation/DelphesValidation.cpp:32:
/home/v/root/include/TGraph.h:36:7: note: forward declaration of ‘class TF1’
   36 | class TF1;
      |       ^~~
validation/DelphesValidation.cpp:1203:23: error: invalid use of incomplete type ‘class TF1’
 1203 |   Double_t sigErr = f2->GetParError(2);
      |                       ^~
In file included from validation/DelphesValidation.cpp:32:
/home/v/root/include/TGraph.h:36:7: note: forward declaration of ‘class TF1’
   36 | class TF1;

[Pavel Demin]

This error was already discussed in #1448 and the fix is in the git repository.

Please try the latest version from the following link:

​​​​https://github.com/delphes/delphes/archive/master.zip