Viewtioga adds classes to ATK to allow the ez editor to read 
Cedar's tioga format files.  It can't write tioga though.

You will have to edit the viewtioga shell script (bin/viewtioga)
to adapt it for your X11 and andrew installations.

Note: the following applies to the Imake generated Makefile in the
src/ directory:
############################################################################
#        Copyright IBM Corporation 1988, 1991 - All Rights Reserved        #
#                                                                          #
# Permission to use, copy, modify, and distribute this software and its    #
# documentation for any purpose and without fee is hereby granted,         #
# provided that the above copyright notice appear in all copies and        #
# that both that copyright notice and this permission notice appear in     #
# supporting documentation, and that the name of IBM not be used in        #
# advertising or publicity pertaining to distribution of the software      #
# without specific, written prior permission.                              #
#                                                                          #
# IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL #
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL IBM #
# BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY      #
# DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER  #
# IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING   #
# OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.    #
############################################################################