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Require C++20 for Axom #1855

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Require C++20 for Axom#1855
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App IntegrationIssues related to integration with applicationsBuild systemIssues related to Axom's build systemReviewedTPLIssues related to Axom's third party librariesUser RequestIssues related to user requestscompilerRelated to various compilers and their quirks
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FY26 Summer release
@kennyweiss

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@kennyweiss
kennyweiss
opened on May 4, 2026

RAJA and Umpire will require C++20 in their next release, so we'll need to require C++20 as well.
This will require:

  • Updating our host-configs to build against C++20
  • Updating our BLT_CXX standard
  • Updating our Axom spack package
  • Update BLT to latest release

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    App IntegrationIssues related to integration with applicationsBuild systemIssues related to Axom's build systemReviewedTPLIssues related to Axom's third party librariesUser RequestIssues related to user requestscompilerRelated to various compilers and their quirks

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