Greg Becker b61bae7640 bugfix: external detection for compilers with os but not target (#44156) ... avoid calling `spec.target` when None. When an external compiler package has an `os` set but no `target` set, Spack currently falls into a codepath that calls `spec.target` (which itself calls `spec.architecture.target.Microarchitecture`) when `spec.architecture.target` is None, throwing an error. e.g. ``` packages: gcc: externals: - spec: gcc@12.3.1 os=rhel7 prefix: /usr ``` --------- Co-authored-by: Todd Gamblin <tgamblin@llnl.gov>		2024-05-24 00:13:36 +00:00
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spack	bugfix: external detection for compilers with os but not target (#44156)	2024-05-24 00:13:36 +00:00