Probably nobody has really used static linking for libdw before.
We wouldn't recommend it.
Since the library has no way to know where you're installing a program you
link it into, the $ORIGIN methods are not really viable. Resorting to an
absolute file name in the library would be dismal.
The library tries the unadorned DSO name if the $ORIGIN name fails.
So you can just build your program with an appropriate DT_RUNPATH,
as we do for libdw.so itself (see libdw/Makefile.am).