The -D option sets the named variable for use in the source file. It is equivalent to using the #define directive in the source file.
The -I option specifies an alternate include directory; multiple -I options can be supplied to add additional directories.
The -c option specifies a single message catalog file in GNU gettext source format (filename.po) to be used for localization.
The -d option specifies the output directory for PPD files. The default output directory is "ppd".
The -l option specifies one or more languages to use when localizing the PPD file(s). The default language is "en" (English). Separate multiple languages with commas, for example "de_DE,en_UK,es_ES,es_MX,es_US,fr_CA,fr_FR,it_IT" will create PPD files with German, UK English, Spanish (Spain, Mexico, and US), French (France and Canada), and Italian languages in each file.
The -v option provides more verbose output, basically a running status of which files are being loaded or written.
The -z option generates compressed PPD files (filename.ppd.gz). The default is to generate uncompressed PPD files.