I asked about this on the OBS mailing list, and the answer I got was that because Leap 15.0 does not have a 32 bit version, i586 builds are enabled by default only for certain packages (I guess that's the "whitelist"). However, it is possible to enable i586 builds for a specific package even if it is not globally enabled by adding this to prjconf:
Code:
%ifarch i586 i686
BuildFlags: onlybuild:$your_package
%endif
Figured I'd post that here in case anyone else runs into the problem. I didn't find it documented anywhere.
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