GForth(1)GForth(1)NAME
gforth, gforth-fast, gforthmi - a fast and portable Forth system
SYNOPSISgforth [initialization options] [image-specific options] gforth-fast
[initialization options] [image-specific options]
gforthmi filename [initialization options] [image-specific options]
DESCRIPTION
GForth is a fast and portable implementation of the Forth programming
language. For details read the manual.
ENVIRONMENT VARIABLES
GFORTHPATH contains the search path for source and image files.
GFORTHD gives the gforth executable used by gforthmi for creating the
base images. It should be a double indirect threaded system. Default:
gforth-ditc.
GFORTH gives the gforth executable used by gforthmi for computing the
relocatable image from the base images. Default: gforth.
GFORTHHIST gives the location of the history file used by gforth to
allow command-line recall. Default: $HOME. (The history file is named
.gforth-history).
EXAMPLESgforth
starts the system and goes into interactive mode.
gforth file1 file2 -e bye
loads and interprets the files file1 and file2, then exits.
gforth-fast
is the same as gforth, except that it does not support accurate back‐
traces for signals, and is faster by up to a factor of 2. Use it for
debugged, performance-critical programs such as benchmarks.
gforthmi asm.fi -m 1M asm.fs
creates an image asm.fi that has a default dictionary size of 1MB and
has the file asm.fs loaded.
OPTIONS--help
Lists the available options, including some not described here (see
also the manual).
--image-file file
Loads the Forth image
file instead of the default gforth.fi.
--path path
Uses path for searching the image file and Forth source code files
instead of the default in the environment variable GFORTHPATH or
the path specified at installation time (typically
/usr/local/lib/gforth:.. A path is given as a :-separated list.
--dictionary-size size
Allocate
size space for the Forth dictionary space instead of using the
default specified in the image (typically 256K). The size speci‐
fication consists of an integer and a unit (e.g., 4M). The unit
can be one of b (bytes), e (element size, in this case Cells), k
(kilobytes), and M (Megabytes). If no unit is specified, e is
used.
--data-stack-size size
Allocate
size space for the data stack instead of using the default spec‐
ified in the image (typically 16K).
--return-stack-size size
Allocate
size space for the return stack instead of using the default
specified in the image (typically 16K).
--fp-stack-size size
Allocate
size space for the floating point stack instead of using the
default specified in the image (typically 16K). In this case the
unit specifier e refers to floating point numbers.
--locals-stack-size size
Allocate
size space for the locals stack instead of using the default
specified in the image (typically 16K).
--evaluate forth
Evaluates the
forth code. This option takes only one argument; if you want to
evaluate more Forth words, you have to quote them or use several
-es. To exit after processing the command line (instead of
entering interactive mode) append -e bye to the command line.
This is an image-specific option of the default image.
FILES
.../gforth.fi default Forth image
*.fi Forth loadable image
*.fs Forth source (sequential)
*.fb Forth source (block)
*.fd generated with makedoc.fs
*.i C include files
*.ds documentation source
*TAGS etags files
SEE ALSO
The Gforth manual - available in hypertext (Info, HTML) and printable
(TeX, PS, ASCII) forms.
The ANSI document X3.215-1994 (i.e., the ANS Forth standard).
More information on Gforth (e.g., pointers to new versions, to the man‐
ual on the WWW and to papers about Gforth) is available through
http://www.complang.tuwien.ac.at/projects/forth.html.
AUTHORS
Gforth was written by Anton Ertl, Bernd Paysan, Jens Wilke and others.
April 14, 1999 GForth(1)
