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ExtUtils::Command provides a number of utilities to replace common UNIX commands in Makefiles, etc. At present the list includes cp, rm_f, rm_rf, mv, cat, eqtime, mkpath, touch, test_f, test_d, chmod, and dos2unix. Also included is the companion module Shell::Command, which is a thin wrapper for ExtUtils::Command to provide cross-platform functions emulating common shell commands.

File::ExtAttr is a Perl module providing access to the extended attributes of the files. Extended attributes are metadata associated with a file. Examples are access control lists (ACLs) and other security parameters. But users can add their own key=value pairs. Extended attributes are supported by FreeBSD starting from version 5.

FcntlLock is a module to do file locking in an object oriented fashion using the fcntl(2) system call. This allows locks on parts of a file as well as on the whole file and overcomes some known problems with flock(2), on which Perls flock() function is based by default.

ExtUtils::CppGuess attempts to guess the system's C++ compiler that is compatible with the C compiler that your perl was built with. It can generate the necessary options to the Module::Build constructor or to ExtUtils::MakeMaker's WriteMakefile function.

This module tries to make it easy to build Perl extensions that use functions and typemaps provided by other perl extensions. This means that a perl extension is treated like a shared library that provides also a C and an XS interface besides the perl one. This works as long as the base extension is loaded with the RTLD_GLOBAL flag (usually done with a sub dl_load_flags {0x01} in the main .pm file) if you need to use functions defined in the module.

ExtUtils::InstallPaths tries to make install path resolution as easy as possible. When you want to install a module, it needs to figure out where to install things. The nutshell version of how this works is that default installation locations are determined from ExtUtils::Config, and they may be individually overridden by using the install_path attribute. An install_base attribute lets you specify an alternative installation root like /home/foo and prefix does something similar in a rather different (and more complicated) way. destdir lets you specify a temporary installation directory like /tmp/install in case you want to create bundled-up installable packages.

ExtUtils::LibBuilder is a tool to build C libraries.

ExtUtils::MakeMaker::CPANfile loads cpanfile in your distribution and modifies parameters for WriteMakefile in your Makefile.PL. Just use it instead of ExtUtils::MakeMaker (which should be loaded internally), and prepare cpanfile. As of version 0.03, ExtUtils::MakeMaker::CPANfile also removes WriteMakefile parameters that the installed version of ExtUtils::MakeMaker doesn't know, to avoid warnings.

This utility is designed to write a Makefile for an extension module from a Makefile.PL. It is based on the Makefile.SH model provided by Andy Dougherty and the perl5-porters. It splits the task of generating the Makefile into several subroutines that can be individually overridden. Each subroutine returns the text it wishes to have written to the Makefile. MakeMaker is object oriented. Each directory below the current directory that contains a Makefile.PL is treated as a separate object. This makes it possible to write an unlimited number of Makefiles with a single invocation of WriteMakefile().

ExtUtils::Manifest provides a number of utilities to write and check a MANIFEST file. At present the list includes mkmanifest, manicheck, filecheck, fullcheck, skipcheck, manifind, maniread, manicopy, and maniadd.