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PROGRAM:

NAME


gcl - GCL Common Lisp interpreter/compiler, CVS snapshot

SYNOPSIS


gcl [ options ]

DESCRIPTION


The program gcl is an implementation of a subset of the Common Lisp Ansi standard. It is
written in C and in Common Lisp, and is highly portable. It includes those features in
the original definition of Common Lisp, (Guy Steele version 1.), as well as some features
from the proposed new standard.

The best documentation is available in texinfo/info form, with there being three groups of
information. gcl-si for basic common lisp descriptions, and features unique to gcl The
gcl-tk info refers to the connection with tk window system, allowing all the power of the
tcl/tk interaction system to be used from lisp. The third info file gcl details the Ansi
standard for common lisp, to which this subset tries to adhere. It is highly recommended
to write programs, which will be in the intersection of gcl and ansi common lisp.
Unfortunately the Ansi standard is huge, and will require a substantial effort, and
increase in the size of gcl, to include all of it.

When gcl is invoked from the shell, the variable si::*command-args* is set to the list of
command line arguments. Various options are understood:

-eval command
Call read and then eval on the command passed in.

-- Stop processing arguments, setting si::*command-args* to a list containing the
arguments after the --.

-load pathname
Load the file whose pathname is specified after -load.

-f Open the file following -f for input, skip the first line, and then read and eval
the rest of the forms in the file. Replaces si::*command-args* by the the list
starting after -f. This can be used as with the shells to write small shell
programs:

#!/usr/local/bin/gcl.exe -f
(format t "hello world ~a~%" (nth 1 si::*command-args*))

The value si::*command-args* will have the appropriate value. Thus if the above 2 line
file is made executable and called foo then

tutorial% foo billy
hello world billy

NOTE: On many systems (eg SunOs) the first line of an executable script file such as:
#!/usr/local/bin/gcl.exe -f only reads the first 32 characters! So if your pathname
where the executable together with the '-f' amount to more than 32 characters the file
will not be recognized. Also the executable must be the actual large binary file, [or a
link to it], and not just a /bin/sh script. In latter case the /bin/sh interpreter would
get invoked on the file.

Alternately one could invoke the file foo without making it executable:

tutorial% gcl -f foo "from bill"
hello world from bill

-batch Do not enter the command print loop. Useful if the other command line arguments
do something. Do not print the License and acknowledgement information. Note if
your program does print any License information, it must print the GCL header
information also.

-dir Directory where the executable binary that is running is located. Needed by save
and friends. This gets set as si::*system-directory*

-libdir
-libdir /d/wfs/gcl-2.0/

would mean that the files like gcl-tk/tk.o would be found by concatting the path to
the libdir path, ie in /d/wfs/gcl-2.0/gcl-tk/tk.o

-compile
Invoke the compiler on the filename following -compile Other flags affect
compilation.

-o-file
If nil follows -o-file then do not produce an .o file.

-c-file
If -c-file is specified, leave the intermediate .c file there.

-h-file
If -h-file is specified, leave the intermediate .h file there.

-data-file
If -data-file is specified, leave the intermediate .data file there.

-system-p
If -system-p is specified then invoke compile-file with the :system-p t keyword
argument, meaning that the C init function will bear a name based on the name of
the file, so that it may be invoked by name by C code.

This GNU package should not be confused with the proprietary program distributed by
FRANZ, Inc. Nor should it be confused with any public domain or proprietary lisp
system.

For anything other than program development, use of the lisp compiler is strongly
recommended in preference to use of the interpreter, due to much higher speed.

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