NAME¶
gforth, gforth-fast, gforthmi - a fast and portable Forth system
SYNOPSIS¶
gforth [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).
EXAMPLES¶
gforth
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 backtraces 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
- -h Lists the available options, including some not described here
(see also the manual).
- --image-file file
-
- -i file Loads the Forth image file instead of the
default gforth.fi.
- --path path
-
- -p 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
-
- -m size Allocate size space for the Forth dictionary
space instead of using the default specified in the image (typically
256K). The size specification 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
-
- -d size Allocate size space for the data stack
instead of using the default specified in the image (typically 16K).
- --return-stack-size size
-
- -r size Allocate size space for the return stack
instead of using the default specified in the image (typically 16K).
- --fp-stack-size size
-
- -f 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
-
- -l size Allocate size space for the locals stack
instead of using the default specified in the image (typically 16K).
- --evaluate forth
-
- -e 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 manual 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.