RAJA and Umpire will require C++20 in their next release, so we'll need to require C++20 as well. This will require: - [x] Updating our host-configs to build against C++20 - [x] Updating our BLT_CXX standard - [x] Updating our Axom spack package - [x] Update BLT to latest release - [x] Update to RAJA and Umpire releases
RAJA and Umpire will require C++20 in their next release, so we'll need to require C++20 as well.
This will require: