I emerged kde-misc/ksynaptics-0.3.1 and in ~ppc arch and it works fine. It depends by x11-libs/libsynaptics-0.14.4d wich compiles and works, but is missing keyword too.
Created attachment 89910 [details] Ebuild with ~ppc keyword ~ppc keyword added with ekeyword
Marked ~ppc, thanks for the report!