Telcon: 2022 04 27

Attendees

• Peter Scheibel (host)
• Mark Krentel
• Massimiliano Culpo
• Matt Belhorn
• Mitchell Dorrel
• Phil Regier
• Tammy Dahlgren
• Wileam Phan

Agenda items

• (Phil) State of container-ization/environments

  • If we package spack with OpenSUSE and advertise it to users for creating containers, then it uses Ubuntu
  • You can edit a YAML file to have them generate containers for other distros
  • But ideally you wouldn't have to
  • (Massimiliano) there are many configuration options, so it would potentially be involved to expose them as command-line options
  • Side note: where is documentation for how to update spack.yaml to choose an alternative distribution
  • See also: https://spack.readthedocs.io/en/latest/containers.html#configuration-reference

• Continue from https://github.com/spack/spack/wiki/Telcon%3A-2022-04-20: reuse and missing package.py files

  • See also: https://github.com/spack/spack/pull/30092
    • "This commit discard specs from unknown namespaces from the ones that can be "reused" during concretization. Previously Spack would just error out when encountering them."
    • Note this should address an entire missing repos as well as a single missing package in a repo

• (Wileam) spack update: https://github.com/spack/spack/issues/9134

• (Wileam) https://github.com/spack/spack/issues/30134

  • Executable script is git-cloned, but loses execute permissions

• (Wileam) aarch64 target

  • (Massimiliano) See: https://github.com/archspec/archspec-json/issues/42

• (Mitchell) can we customize flags for a given target?

  • The JSON file in archspec lists flags for each target
  • Spack vendors archspec in lib/spack/external, you can modify the file there
  • (Matt) You can also define a custom compiler like gcc@custom-version with additional flags

• (Mitchell) when is compilers-as-dependencies going to happen?

  • After 0.18

• (Matt) support for mixed-toolchain

  • loosely-supported now
  • (Peter) Can also use spack-python to possibly propagate these in a more controlled manner

Possible Agenda items

• Upcoming Cray support changes:
  • For 0.18
  • manifest (https://github.com/spack/spack/pull/29652)
  • (Greg) module list cray environments
• (Matt) if we build an environment, and one package fails, then module files are not generated
  • Want spack module refresh but only to generate module files that haven't been generated yet
• Updating compiler wrapper to strip -Werror (optionally): https://github.com/spack/spack/pull/30284
• (Wileam) Adding fpm as a build system
• Default action for concretization in environments: https://github.com/spack/spack/pull/29942#issuecomment-1097287194
• Continue from https://github.com/spack/spack/wiki/Telcon%3A-2022-04-06: warning() directive
• (Wileam) Can't bootstrap llvm@13 and @14 if gold is enabled (which is the default behavior) https://github.com/spack/spack/issues/29350
• How to reorganize the docs?
• Continue from https://github.com/spack/spack/wiki/Telcon%3A-2022-03-09: Packages with multiple build systems
  • https://github.com/spack/spack/pull/29530
  • (Peter) What about external package repositories?
• Continue from https://github.com/spack/spack/wiki/Telcon%3A-2022-04-13: not in spec syntax