Inform is a program to compile programs into the Infocom interpreter
format.  Here is the README for this package:

This is a BeOS binary of the Inform 6.11 executable compiled by Michael
Van Biesbrouck (mlvanbie@csclub.uwaterloo.ca).  It was compiled on a DR
8.2 BeBox, but it should run just fine on other hardware.

Technically, the executable is the only thing that you need.  You will
probably want to FTP documentation, libraries and sample programs from

  ftp://ftp.gmd.de/if-archive/infocom/compilers/inform6/

There is also an Inform Web page

  http://www.gnelson.demon.co.uk/inform.html

This distribution contains two patches, one to add the BeOS definitions
to the file header (you will still need to change the platform, though)
and another one to add a Makefile.  If you apply the BeOS patch and
then the Makefile patch you can edit the Makefile and then type

  make source
  make

(Normally you have to rename file sto have .c and .h extensions.)
Note that the Makefile is intended to work anywhere that is Unix-like
and could be modified to run under DOS, OS/2 or whatever.  The Makefile
assumes that your make will define appropriate optimizations ... I
added extra optimization and linking options to the Makefile when
building the BeOS Inform (-opt full and -sym off).