On 5fb1d6e the --disable-rpath configure flag seems to have no effect on the linkage of libsma.so. However, it does seem to do the right thing (e.g., add -Wl,-rpath -Wl,/path/to/libfabric/lib -Wl,-rpath -Wl,/path/to/SOS/lib) to the compiler wrappers (oshcc and friends). I'm unsure if this is a regression.
Thanks for the report @tmh97 and @bcernohous.