WIP: Added spack packaging for pythia8

• This will add the variant hepmc3 to pythia8

IMO this was far too much work to add a missing configure flag.

added critical missing labels

added 1 commit

• 5046a7b7 - swapped order of hepmc and pythia8 in spack

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Of course every approach has drawbacks, and running into this case where the package maintainers of Pythia didn't properly update their package is one for spack. I'll put in a pull request for the official spack repo to fix this upstream once we've got everything else taken care of.

marked this merge request as draft

closed