diff -up smproxy-1.0.2/configure.ac.jx smproxy-1.0.2/configure.ac
--- smproxy-1.0.2/configure.ac.jx	2006-04-01 19:41:48.000000000 -0500
+++ smproxy-1.0.2/configure.ac	2010-02-09 17:20:40.000000000 -0500
@@ -34,7 +34,7 @@ AC_CHECK_FUNC([mkstemp], 
    AC_DEFINE(HAS_MKSTEMP,1,[Define to 1 if you have the `mkstemp' function.]))
 
 # Checks for pkg-config packages
-PKG_CHECK_MODULES(SMPROXY, xt xmu)
+PKG_CHECK_MODULES(SMPROXY, xt xmu sm)
 AC_SUBST(SMPROXY_CFLAGS)
 AC_SUBST(SMPROXY_LIBS)