NAME

Verilog::Getopt - Get Verilog command line options

SYNOPSIS

  use Verilog::Getopt;
  my $opt = new Verilog::Getopt;
  $opt->parameter (qw( +incdir+standard_include_directory ));
  @ARGV = $opt->parameter(@ARGV);
  ...
  print "Path to foo.v is ", $opt->file_path('foo.v');

DESCRIPTION

Verilog::Getopt provides standardized handling of options similar to Verilog/VCS and cc/GCC.

OPTIONS

The new() constructor accepts the following options:

filename_expansion=>1: Enable converting filenames to relative filenames when possible. This option is needed when the -F option will be used. If flags are passed through Getopt which should otherwise not be expanded (e.g. "--out myfile.v") having this option set may undesirably expand myfile.v to an absolute filename.
gcc_style=>0: Disable parsing of GCC-like parameters.
vcs_style=>0: Disable parsing of VCS-like parameters.

METHODS

$opt = Verilog::Getopt->new ( opts )

Create a new Getopt. See OPTIONS above.

$self->file_path(filename, [lookup_type])

Returns a new path to the filename, using the library directories and search paths to resolve the file. Optional lookup_type is 'module', 'include', or 'all', to use only module_dirs, incdirs, or both for the lookup.

$self->get_parameters()

Returns a list of parameters that when passed through $self->parameter() should result in the same state. Often this is used to form command lines for downstream programs that also use Verilog::Getopt.

$self->parameter(\@params)

Parses any recognized parameters in the referenced array, removing the standard parameters from any previous parameters() call, and returning a array with all unparsed parameters.

The below list shows the VCS-like parameters that are supported, and the functions that are called:

    +libext+I<ext>+I<ext>...    libext (I<ext>)
    +incdir+I<dir>              incdir (I<dir>)
    +define+I<var>=I<value>     define (I<var>,I<value>)
    +define+I<var>              define (I<var>,undef)
    +librescan          Ignored
    -F I<file>          Parse parameters in file relatively
    -f I<file>          Parse parameters in file
    -v I<file>          library (I<file>)
    -y I<dir>           module_dir (I<dir>)
    all others          Put in returned list

The below list shows the GCC-like parameters that are supported, and the functions that are called:

    -DI<var>=I<value>           define (I<var>,I<value>)
    -DI<var>            define (I<var>,undef)
    -UI<var>            undefine (I<var>)
    -II<dir>            incdir (I<dir>)
    -F I<file>          Parse parameters in file relatively
    -f I<file>          Parse parameters in file
    all others          Put in returned list

$self->write_parameters_file(filename)

Write the output from get_parameters to the specified file.

ACCESSORS

$self->define($token, $value): This method is called when a define is recognized. The default behavior loads a hash that is used to fulfill define references. This function may also be called outside parsing to predefine values.
An optional third argument specifies parameters to the define, and a fourth argument if true indicates the define was set on the command line and should not be removed by `undefineall.
$self->define_names_sorted: Return sorted list of all define names that currently exist.
$self->defparams($token): This method returns the parameter list of the define. This will be defined, but false, if the define does not have arguments.
$self->defvalue($token): This method returns the value of a given define, or prints a warning.
$self->defvalue_nowarn($token): This method returns the value of a given define, or undef.
$self->depend_files(): Returns reference to list of filenames referenced with file_path, useful for creating dependency lists. With argument, adds that file. With list reference argument, sets the list to the argument.
$self->file_abs($filename): Using the incdir and libext lists, convert the specified module or filename ("foo") to a absolute filename ("include/dir/foo.v").
$self->file_skip_special($filename): Return true if the filename is one that generally should be ignored when recursing directories, such as for example, ".", "CVS", and ".svn".
$self->file_substitute($filename): Removes existing environment variables from the provided filename. Any undefined variables are not substituted nor cause errors.
$self->incdir: Returns reference to list of include directories. With argument, adds that directory.
$self->includes: Returns reference to hash of files that included some file, and for each hash value a list of files included. Only relevant after Verilog::Netlist processing. With two arguments, adds an include for the given referencing filename to the given include filename.
$self->libext: Returns reference to list of library extensions. With argument, adds that extension.
$self->libext_matches(filename): Returns true if the passed filename matches the libext.
$self->library: Returns reference to list of libraries. With argument, adds that library.
$self->module_dir: Returns reference to list of module directories. With argument, adds that directory.
$self->remove_defines($token): Return string with any definitions in the token removed.
$self->undef($token): Deletes a hash element that is used to fulfill define references. This function may also be called outside parsing to erase a predefined value.
$self->undefineall: Deletes all non-command line definitions, for implementing `undefineall.

DISTRIBUTION

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

Copyright 2000-2022 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>