Harmen Stoppels c5aee4d9b4 define_from_variant: return an empty string for non-existing variants (#27503) ... This permits to use conditional variants without a lot of boilerplate.		2021-11-19 14:10:00 +01:00
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spack	define_from_variant: return an empty string for non-existing variants (#27503)	2021-11-19 14:10:00 +01:00