[ns] nam install problem ns-allinone-2.1b8

[Seong-kyu Song <sksong@ece.utexas.edu>]

Hi, all.
I'm trying to install nam using allinone-2.1b8 on my Intel machine
running Linux Redhat 6.2.

The error messages are like:
/*********************************************************************/
$> make
rm -f nam
c++   -o nam \
	tkcompat.o tkUnixInit.o xwd.o netview.o netmodel.o edge.o packet.o
node.o main.o trace.o queue.o drop.o animation.o agent.o feature.o route.o
transform.o paint.o state.o monitor.o anetmodel.o random.o rng.o view.o
graphview.o netgraph.o tracehook.o lan.o psview.o group.o editview.o tag.o
address.o animator.o wnetmodel.o nam_stream.o enetmodel.o testview.o
parser.o trafficsource.o gen/version.o gen/nam_tcl.o
-L/home/ns/ns-allinone-2.1b8/tclcl-1.0b11 -ltclcl
-L/home/ns/ns-allinone-2.1b8/otcl-1.0a7 -lotcl
-L/home/ns/ns-allinone-2.1b8/lib -ltk8.3 -L/home/ns/ns-allinone-2.1b8/lib
-ltcl8.3 -L/home/ns/ns-allinone-2.1b8/zlib-1.1.3 -lz -L/usr/X11R6/lib
-lXext -lX11 -lnsl -ldl -lm 
netview.o: In function `NetView::NetView(char const *, NetModel *)':
netview.o(.text+0xb8): undefined reference to `__rethrow'
netmodel.o: In function `NetModel::NetModel(char const *)':
netmodel.o(.text+0x327): undefined reference to `__rethrow'
netmodel.o(.text+0x346): undefined reference to `__rethrow'
netmodel.o: In function `NetModel::add_monitor(Animation *)':
netmodel.o(.text+0xa2b): undefined reference to `__rethrow'
netmodel.o: In function `NetModel::handle(TraceEvent const &, double,
int)':
netmodel.o(.text+0x2693): undefined reference to `__rethrow'
netmodel.o(.text+0x26b3): more undefined references to `__rethrow' follow
collect2: ld returned 1 exit status
make: *** [nam] Error 1

/**********************************************************/

Could you help me figure it out?
Thanks.

Seong-Kyu Song
http://www.ece.utexas.edu/~sksong/
------------------------------------------
What is now proved was once only imagin'd.
                       -- William Blake