Greg Becker da9a562182 environments: allow 'add' command to add virtuals (#13787) ...

This PR allows virtual packages to be added to the specs list using
the add command.

Virtual packages are already allowed in named lists in spack
environments/stacks, and they are already allowed in the specs list
when added using the yaml directly.

2019-12-09 12:23:03 -08:00

..

spack

environments: allow 'add' command to add virtuals (#13787)

2019-12-09 12:23:03 -08:00