r.le compilation ?

Hello:
I'm compiling the r.le programs on a Sun10 (SunOS 4.1.3). I began by
initiating "gmake4.1" from the directory containing the r.le programs.
Everything proceeds smoothly until this message:
   #######################
   ~/src.contrib/UW/r.le setup
   make -f OBJ/make.rules

   gmake4.1 polytocell
   sh: gmake4.1: not found
   *** Error code 1
   make: Fatal error: command failed for target 'all'

Any suggestions?

Thanks,
Mike Killion (killion@ukanvm.bitnet)
KARS Program
University of Kansas
Lawrence, KS 66045