feat: ROOT C++20 support, `root cxxstd=20` (!351) · Merge requests · containers / eic_container

Wouter Deconinck requested to merge root-cxxstd-20 into master Sep 14, 2022

This adds ROOT C++20 support. It requires some changes to dependencies too:

podio needs cxxstd support (https://github.com/spack/spack/pull/30437)
acts hard-depends on root cxxstd=17 for no real reason other than inability to depend on multiple variants in spack (https://github.com/spack/spack/pull/38682)
need support for acts@24: for cxxstd=20 (https://github.com/spack/spack/pull/37055)

Edited Aug 05, 2023 by Wouter Deconinck

feat: ROOT C++20 support, `root cxxstd=20`