Passing parameters from %prep to %build

[Eran Ben Natan]

Hi,

I have the following problem: In the %prep, I run a command that returns a value.
I want to be able to use this value in the %build.
I was not able to do it with macros, because %global gets its value on init, and %declare is executed when called.
I also wasn't able to use bash parameters because they are not shared between %prep and %build.
I have 2 workarounds: Do all in %prep, or save the vale to a file. I'm not comfortable with any of these workarounds.
This seems to be a simple task. Am I missing something?

Thanks, Eran.
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