Error linking against libXt

[Lou Losee]

Hi,
I am trying to compile and link the Rob Pike's 'sam' editor available
from the bell labs site.  I am having problems when it comes to linking
the executable.  The statement that is failing is:

gcc -o samterm main.o flayer.o icons.o io.o menu.o mesg.o rasp.o
scroll.o unix.o ../../libframe.a -lm ../../libXg/.libs/libXg.a -lXt
-lX11 -lm -lm ../../libplan9c/.libs/libplan9c.a -lm -lm -lXt -lX11

The error returned is:
/usr/lib/gcc-lib/i686-pc-cygwin/3.3.1/../../../../i686-pc-cygwin/bin/ld: cannot find -lXt

Looking in /usr/X11R6/lib/ I find:
libXt-6.dll.a
libXt.dll.a -> libXt-6.dll.a

So I figured I needed a libXt.a and following the procedure in the
'Building and Using DLLs - Linking Against DLLs' section of Chapter 4 of
the Users Guide, I issued the following commands to create a libXt.a

echo EXPORTS > libXt.def
nm libXt.dll.a | grep ' T _' | sed 's/.* T _//' >> libXt.def
dlltool --def libXt.def --dllname libXt.dll.a --output-lib libXt.a

This did not help at all!!  I still get the same error.

I assume I will run into the same error when ld gets to the -lX11 parm,
since the same type of files exist for it in /usr/X11R6/lib/
libX11-6.dll.a
libX11.dll.a -> libX11-6.dll.a

One last thing, what are the -lm options in the gcc command invocation?
It isn't a library named libm.a right?  I can't find any other reference
to such an option for ld anywhere.

Anyway, can anyone give me some pointers as to where to go next?

Thanks 
Lou