# phpman > perldoc > ExtUtils::MM_VOS

## NAME
    [ExtUtils::MM_VOS](https://www.chedong.com/phpMan.php/perldoc/ExtUtils%3A%3AMMVOS/markdown) - VOS specific subclass of [ExtUtils::MM_Unix](https://www.chedong.com/phpMan.php/perldoc/ExtUtils%3A%3AMMUnix/markdown)

## SYNOPSIS
      Don't use this module directly.
      Use [ExtUtils::MM](https://www.chedong.com/phpMan.php/perldoc/ExtUtils%3A%3AMM/markdown) and let it choose.

## DESCRIPTION
    This is a subclass of [ExtUtils::MM_Unix](https://www.chedong.com/phpMan.php/perldoc/ExtUtils%3A%3AMMUnix/markdown) which contains functionality for VOS.

    Unless otherwise stated it works just like [ExtUtils::MM_Unix](https://www.chedong.com/phpMan.php/perldoc/ExtUtils%3A%3AMMUnix/markdown).

### Overridden methods
   extra_clean_files
    Cleanup VOS core files

## AUTHOR
    Michael G Schwern <<schwern@pobox.com>> with code from [ExtUtils::MM_Unix](https://www.chedong.com/phpMan.php/perldoc/ExtUtils%3A%3AMMUnix/markdown)

## SEE ALSO
    [ExtUtils::MakeMaker](https://www.chedong.com/phpMan.php/perldoc/ExtUtils%3A%3AMakeMaker/markdown)