This is how I build the lesstif library (0.79 and 0.80 have been tried).
This makes lesstif never free any memory -- don't use this for "real"
programs...

Type this at your shell:

  cd /tmp
  tar xvfz .../lesstif-0.79.tar.gz
  cd lesstif-0.79
  ./configure
  cd lib/Xm
  mv Makefile Makefile.orig
  sed -e 's/-g/-O3 -D"XtFree(a)=" -fomit-frame-pointer -pipe/' \
     < Makefile.orig > Makefile
  make

Then install the lesstif shareable library in 
	/usr/local/jdk1.1/lib/i386/green_threads/libXm.so.1.2