On Fri, Jul 14, 2023 at 2:30 PM Richard W.M. Jones <rjones@xxxxxxxxxx> wrote:
>
> For some virt packages we need to combine 2 or 3 of:
>
> ExclusiveArch: %{kernel_arches}
> ExclusiveArch: %{qemu_sysemu_host_arches} # [1]
> ExclusiveArch: %{ocaml_native_compiler}
>
> to mean only compile on the intersection of these arches. If you have
> multiple ExclusiveArch lines then RPM seems to do the union of arches
> which is the opposite of what anyone would want.
>
> Dan Berrange came up with a clever way to do it though ...
>
> %ifnarch %{kernel_arches}
> ExcludeArch: %{_arch}
> %endif
> %ifnarch %{qemu_sysemu_host_arches}
> ExcludeArch: %{_arch}
> %endif
>
> But this makes my head hurt. Is there a better way or could RPM
> provide explicit union and intersection operators?
Well, if you want set union / intersection as an RPM macro, the first
thing I'd try would be to implement this as a lua macro ...
Lua does not have a native "set" data type, but it can be simulated by
using a table's (hashmap's) keys as a "set".
Fabio
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