wvstreams and wvdial because they rely on getcontext and setcontext, not available in armel and kfreebsd* implementations of eglibc (and this feature won't probably be implemented soon).
Why do you think getcontext/setcontext is not available on GNU/kFreeBSD ? It is available for a very long time already, see i.e. http://svn.debian.org/wsvn/glibc-bsd/trunk/glibc-ports/kfreebsd/i386/getcontext.S Petr