[XForms] Problem compiling with Mac OS X

[Reed Riddle]

Howdy folks,

I'm trying to compile the library under OS X, and I keep running into 
the following errors when I run the configure script:

** Cannot find xpm.h. Please check that the Xpm library
    is correctly installed on your system.

** Cannot find libjpeg. Please check that the jpeg library
    is correctly installed on your system.

I can see both xpm.h (in /usr/X11R6/lib/X11/) and libjpeg (in /sw/lib). 
  I know that the X libraries aren't being seen at all when I compile, 
as all kinds of errors come up related to X.  I also know how to set 
Linux so that it will find where you have libraries (using ldconfig), 
but I can't find any information like that for OS X.  And, I can't 
figure out what to change in the configuration files to force it to see 
the library directories.

No, I'm not frustrated...  :)  Anything that can point me in the right 
direction to get this to work will be greatly appreciated.  Thanks!

					Reed

----------------------------------------------------------------------
Dr. Reed L. Riddle
Associate Director of Whole Earth Telescope Operations
Iowa State University Department of Physics & Astronomy
Email:  drriddle at qwest.net			
Homepage:  http://www3.iitap.iastate.edu/~riddle/

"This life has been a test.  If it had been an actual life, you would
  have received actual instructions on where to go and what to do."
                                 -- Angela Chase, "My so-called life"