Question about doc subpackage

[Michał Bentkowski]

Hi! I have a question about doc subpackage. Packaging Guidelines
doesn't say anything about it, but I think that doc subpackages should
be noarch, because they aren't architecture dependent. But when I
write "BuildArch: noarch" to subpackage, RPM gives an error. It
extracts debug info, but not create debuginfo package. It treats whole
package as noarch. Is there an option to get doc subpackage on other
buildarch than main package?