Irix 6.x ld has -rpath.

Rev: bin/smartlink:1.19

bin/smartlink

@@ -117,6 +117,9 @@ if test x$# != x0 ; then
    OSF1\ V4.*)
      LDOPTS="$LDOPTS -rpath $RPATH"
    ;;
+   IRIX\ 6.*)
+     LDOPTS="$LDOPTS -rpath $RPATH"
+   ;;
    SunOS\ 5.*)
      LDOPTS="$LDOPTS -R$RPATH"
    ;;