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Command Line Options
********************

   The simplest way to use GASP is to run it as a filter and assemble
its output.  In Unix and its ilk, you can do this, for example:

     $ gasp prog.asm | as -o prog.o

   Naturally, there are also a few command-line options to allow you to
request variations on this basic theme.  Here is the full set of
possibilities for the GASP command line.

     gasp  [ -a | --alternate ]
           [ -c CHAR | --commentchar CHAR ]
           [ -d | --debug ]  [ -h | --help ] [ -M | --mri ]
           [ -o OUTFILE | --output OUTFILE ]
           [ -p | --print ]  [ -s | --copysource ]
           [ -u | --unreasonable ]  [ -v | --version ]
           INFILE ...

`INFILE ...'
     The input file names.  You must specify at least one input file;
     if you specify more, GASP preprocesses them all, concatenating the
     output in the order you list the INFILE arguments.

     Mark the end of each input file with the preprocessor command
     `.END'.  Miscellaneous commands: Other Commands    

`-a'
`--alternate'
     Use alternative macro syntax.  *Note Alternate macro syntax:
     Alternate, for a discussion of how this syntax differs from the
     default GASP syntax.

`-c 'CHAR''
`--commentchar 'CHAR''
     Use CHAR as the comment character.  The default comment character
     is `!'.  For example, to use a semicolon as the comment character,
     specify `-c ';'' on the GASP command line.  Since assembler
     command characters often have special significance to command
     shells, it is a good idea to quote or escape CHAR when you specify
     a comment character.

     For the sake of simplicity, all examples in this manual use the
     default comment character `!'.

`-d'
`--debug'
     Show debugging statistics.  In this version of GASP, this option
     produces statistics about the string buffers that GASP allocates
     internally.  For each defined buffersize S, GASP shows the number
     of strings N that it allocated, with a line like this:

          strings size S : N

     GASP displays these statistics on the standard error stream, when
     done preprocessing.

`-h'
`--help'
     Display a summary of the GASP command line options.

`-M'
`--mri'
     Use MRI compatibility mode.  Using this option causes GASP to
     accept the syntax and pseudo-ops used by the Microtec Research
     `ASM68K' assembler.

`-o OUTFILE'
`--output OUTFILE'
     Write the output in a file called OUTFILE.  If you do not use the
     `-o' option, GASP writes its output on the standard output stream.

`-p'
`--print'
     Print line numbers.  GASP obeys this option *only* if you also
     specify `-s' to copy source lines to its output.  With `-s -p',
     GASP displays the line number of each source line copied
     (immediately after the comment character at the beginning of the
     line).

`-s'
`--copysource'
     Copy the source lines to the output file.  Use this option to see
     the effect of each preprocessor line on the GASP output.  GASP
     places a comment character (`!' by default) at the beginning of
     each source line it copies, so that you can use this option and
     still assemble the result.

`-u'
`--unreasonable'
     Bypass "unreasonable expansion" limit.  Since you can define GASP
     macros inside other macro definitions, the preprocessor normally
     includes a sanity check.  If your program requires more than 1,000
     nested expansions, GASP normally exits with an error message.  Use
     this option to turn off this check, allowing unlimited nested
     expansions.

`-v'
`--version'
     Display the GASP version number.