Problem Compiler when Installing Delphes & ExRootAnalysis

[yburkard]

Hello, I have installed MG5 version 3.4.1 (also tried past versions like 2.7.3 and 3.1.1) and wanted to further install Delphes and ExRootAnalysis, but there is a problem with the compiler which is needed:
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Command "install Delphes" interrupted with error:
InvalidCmd : Require g77 or Gfortran compiler
""""""""""
I have gcc4.8 as compiler; is there a Delphes / ExRootAnalysis version compatible with that?

Thanks in advance,

Yannick

[Pavel Demin]

The error message is strange. As far as I know, Delphes does not require a FORTRAN compiler.

We regularly test Delphes with Ubuntu 14.04 and gcc 4.8. So all Delphes versions are compatible with gcc 4.8.

I do not know if ExRootAnalysis is really useful for anything. MG5 now generates files in HepMC format and ExRootAnalysis cannot read this format. All the functionality of ExRootAnalysis is available in Delphes.

[yburkard]

Thanks for your reply; I am trying to install Delphes on a Red Hat Entreprise Linux (v. 7.9) distribution, which has Fedora as its upstream source. Perhaps Delphes is not compatible with this distribution?
Cheers,
Yannick

[Pavel Demin]

Delphes runs on RHEL 7 without any problem.

The MG5 error message clearly indicates that gfortran is missing on your system.

I think the solution is to install gfortran:

yum install gcc-gfortran