[Rpm-maint] [rpm-software-management/rpm] RFE: optional one-shot/cached macro expansion (#1155)

[Panu Matilainen]

pmatilai left a comment (rpm-software-management/rpm#1155)

> So mymacro<o> would expand on first use, cache the result, and immediately expand again? I find that a bit weird. I prefer an implicit <l>.

Yeah, the *result* would get expanded. Which I too find weird. That's what happens with %global, but people find that weird as well. So I really prefer the implicit `<l>` as well. 

> Regarding %global/-e and : I think it should expand at definition time and mark the result as oneshot so that it caches the second expansion at macro use time.

Ack, that was my thinking as well. 


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