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PROGRAM:

NAME

vppreproc - Preprocess Verilog code using verilog-perl

SYNOPSIS

vppreproc --help
vppreproc [verilog_options] [-o filename] [verilog_files.v...]

DESCRIPTION

Vppreproc reads the Verilog files passed on the command line and outputs preprocessed
output to standard out or the filename passed with -o.

Note vppreproc was named vppp until release 3.100, so if you're looking for vppp, this is
the right replacement. The vppp name conflicted with another non-Verilog related tool.

VERILOG ARGUMENTS

The following arguments are compatible with GCC, VCS and most Verilog programs.

+define+var+value =item -Dvar=value
Defines the given preprocessor symbol.

-f file
Read the specified file, and act as if all text inside it was specified as command
line parameters.

-f file
Read the specified file, and act as if all text inside it was specified as command
line parameters. Any relative paths are relative to the current directory.

+incdir+dir =item -Idir
Add the directory to the list of directories that should be searched for include
directories or libraries.

+libext+ext+ext...
Specify the extensions that should be used for finding modules. If for example module
x is referenced, look in x.ext.

-y dir
Add the directory to the list of directories that should be searched for include
directories or libraries.

VPPREPROC ARGUMENTS

--help
Displays this message and program version and exits.

--o file
Use the given filename for output instead of stdout.

--dump-defines
Suppress normal output, and instead print a list of all defines existing at the end of
processing the input file.

--noblank
Removes empty lines from the output. Should be used with --noline, as if correct line
numbers are needed, blank lines must be preserved for proper accounting by the program
reading the output of vppreproc.

--nocomment
Remove comments.

--noline
Remove `line directives.

-P Same as --noline --noblank, similar to "GCC -P" behavior.

--pedantic
Rigorously obey the Verilog spec. This disables the `error feature, and may disable
other features that are not specified in the approved language reference manual.
Defaults false.

--simple
Requests simple output, an alias for --noline, --nocomment and --noblank.

--sythesis
Define SYNTHESIS, and ignore text bewteen "ambit", "pragma", "synopsys" or "synthesis"
translate_off and translate_on meta comments. Note using metacomments is discouraged
as they have led to silicon bugs (versus ifdef SYNTHESIS); see
<http://www.veripool.org/papers/TenIPEdits_SNUGBos07_paper.pdf>.

--version
Displays program version and exits.

LANGUAGE EXTENSIONS

Vppreproc supports the preprocessing constructs defined in the Verilog 2001 and
SystemVerilog 2005 standards.

The following additional constructs may be added to your Verilog code.

`__FILE__
The __FILE__ define expands to the current filename as a string, like C++'s __FILE__.
This was incorporated into to the 1800-2009 standard (but supported by Verilog-Perl
since 2004!)

`__LINE__
The __LINE__ define expands to the current filename as a string, like C++'s __LINE__.
This was incorporated into to the 1800-2009 standard (but supported by Verilog-Perl
since 2004!)

`error string
This will report an error when encountered, like C++'s #error.

DISTRIBUTION

Verilog-Perl is part of the <http://www.veripool.org/> free Verilog EDA software tool
suite. The latest version is available from CPAN and from
<http://www.veripool.org/verilog-perl>.

Copyright 2000-2016 by Wilson Snyder. This package is free software; you can redistribute
it and/or modify it under the terms of either the GNU Lesser General Public License
Version 3 or the Perl Artistic License Version 2.0.

AUTHORS

Wilson Snyder <wsnyder@wsnyder.org>

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