On Fri, 2023-07-14 at 13:30 +0100, Richard W.M. Jones 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.
I beg to differ. When a tag in RPM can have multiple items (e.g.
Provides, (Build)Requires), this …:
Tag: item1 item2 item3
… is consistently equivalent to this:
Tag: item1
Tag: item2
Tag: item3
To have ExclusiveArch behave differently would be surprising – nobody
(😉) would read this and expect the effective list of arches the
package would be built for to be empty:
ExclusiveArch: x86_64
ExclusiveArch: s390x
ExclusiveArch: aarch64
> 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?
I think this would be a good approach.
Nils
--
Nils Philippsen / Senior Software Engineer / Red Hat
PGP fingerprint: D0C1 1576 CDA6 5B6E BBAE 95B2 7D53 7FCA E9F6 395D
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