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     my $latest_version = $versions[-1];

    Return the list of versions of libarchive available on the Internet.
    Will throw an exception if the libarchive.org website is unreachable.
    Versions will be sorted from oldest (smallest) to newest (largest).

 fetch

     my($location, $version) = Alien::Libarchive::Installer->fetch(%options);
     my $location = Alien::Libarchive::Installer->fetch(%options);

    NOTE: using this method may (and probably does) require modules
    returned by the build_requires method.

    Download libarchive source from the internet. By default it will
    download the latest version to a temporary directory which will be
    removed when Perl exits. Will throw an exception on failure. Options
    include:

    dir

      Directory to download to

    version

      Version to download

 build_requires

     my $prereqs = Alien::Libarchive::Installer->build_requires;
     while(my($module, $version) = each %$prereqs)
     {
       ...
     }

    Returns a hash reference of the build requirements. The keys are the
    module names and the values are the versions.

    The requirements may be different depending on your platform.

 system_requires

    This is like build_requires, except it is used when using the
    libarchive that comes with the operating system.

 system_install

     my $installer = Alien::Libarchive::Installer->system_install(%options);

    NOTE: using this method may require modules returned by the
    system_requires method.

    NOTE: This form will also use the libarchive provided by
    Alien::Libarchive if version 0.21 or better is installed. This makes
    this method ideal for finding libarchive as an optional dependency.

    Options:

    test

      Specifies the test type that should be used to verify the integrity
      of the system libarchive. Generally this should be set according to
      the needs of your module. Should be one of:

      compile

	use test_compile_run to verify. This is the default.

      ffi

	use test_ffi to verify

      both

	use both test_compile_run and test_ffi to verify

    alien

      If true (the default) then an existing Alien::Libarchive will be used
      if version 0.21 or better is found. Usually this is what you want.

 build_install

     my $installer = Alien::Libarchive::Installer->build_install( '/usr/local', %options );

    NOTE: using this method may (and probably does) require modules
    returned by the build_requires method.

    Build and install libarchive into the given directory. If there is an
    error an exception will be thrown. On a successful build, an instance
    of Alien::Libarchive::Installer will be returned.

    These options may be passed into build_install:

    tar

      Filename where the libarchive source tar is located. If not specified
      the latest version will be downloaded from the Internet.

    dir

      Empty directory to be used to extract the libarchive source and to
      build from.

    test

      Specifies the test type that should be used to verify the integrity
      of the build after it has been installed. Generally this should be
      set according to the needs of your module. Should be one of:

      compile

	use test_compile_run to verify. This is the default.

      ffi

	use test_ffi to verify

      both

	use both test_compile_run and test_ffi to verify

ATTRIBUTES

    Attributes of an Alien::Libarchive::Installer provide the information
    needed to use an existing libarchive (which may either be provided by
    the system, or have just been built using build_install.

 cflags

    The compiler flags required to use libarchive.

 libs

    The linker flags and libraries required to use libarchive.

 dlls

    List of DLL or .so (or other dynamic library) files that can be used by
    FFI::Raw or similar.

 version

    The version of libarchive

INSTANCE METHODS

 test_compile_run

     if($installer->test_compile_run(%options))
     {
       # You have a working Alien::Libarchive as
       # specified by %options
     }
     else
     {
       die $installer->error;
     }

    Tests the compiler to see if you can build and run a simple libarchive
    program. On success it will return the libarchive version. Other
    options include

    cbuilder

      The ExtUtils::CBuilder instance that you want to use. If not
      specified, then a new one will be created.

    dir

      Directory to use for building the executable. If not specified, a
      temporary directory will be created and removed when Perl terminates.

    quiet

      Passed into ExtUtils::CBuilder if you do not provide your own
      instance. The default is true (unlike ExtUtils::CBuilder itself).

 test_ffi

     if($installer->test_ffi(%options))