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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 2000-2014 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>

SEE ALSO

       Verilog-Perl, Verilog::Getopt, Verilog::Preproc



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