[OSX] milter won't build

[rdack]

osx 10.1.2, python2.1, milter-0.3.9
fixed first problem adding  '-flat_namespace' to config/makefile

now i get:
cc -bundle -flat_namespace -undefined suppress
build/temp.darwin-5.2-Power Macintosh-2.1/miltermodule.o -lmilter -lsm
-o build/lib.darwin-5.2-Power Macintosh-2.1/milter.so
/usr/bin/ld: can't locate file for: -lsm

what file is it looking for? why can't it find it? what is option
'-lsm'? could i just remove it? what file would it be in?