Currently the new polyml-5.2.1 is only keyworded for ~amd64. I can confirm it builds all right on ~x86, so that keyword can be added, I think. According to http://www.polyml.org/FAQ.html#platforms it should also support at least ppc and sparc, and probably many more. So you should at least try to see what arches it compiles out of the box, and add keywords for those. See also bug 35548 comment 20 where I made this request before.
x86 stable, all arches done.
(In reply to comment #1) > x86 stable, all arches done. not stable, ~x86 added.
Thanks Markus.