# THIS FILE IS AUTOMATICALLY GENERATED FROM lib_pm.PL.
# ANY CHANGES TO THIS FILE WILL BE OVERWRITTEN BY THE NEXT PERL BUILD.
my $archname = $Config{archname
};
my $version = $Config{version
};
my @inc_version_list = reverse split / /, $Config{inc_version_list
};
our @ORIG_INC = @INC; # take a handy copy of 'original' value
my $Is_MacOS = $^O
eq 'MacOS';
$Mac_FS = eval { require Mac
::FileSpec
::Unixish
};
my $path = $_; # we'll be modifying it, so break the alias
Carp
::carp
("Empty compile time value given to use lib");
$path = _nativize
($path);
if (-e
$path && ! -d _
) {
Carp
::carp
("Parameter to use lib must be directory, not file");
# Add any previous version directories we found at configure time
foreach my $incver (@inc_version_list)
? File
::Spec
->catdir( $path, $incver )
unshift(@INC, $dir) if -d
$dir;
# Put a corresponding archlib directory in front of $path if it
# looks like $path has an archlib directory below it.
my($arch_auto_dir, $arch_dir, $version_dir, $version_arch_dir)
unshift(@INC, $arch_dir) if -d
$arch_auto_dir;
unshift(@INC, $version_dir) if -d
$version_dir;
unshift(@INC, $version_arch_dir) if -d
$version_arch_dir;
# remove trailing duplicates
@INC = grep { ++$names{$_} == 1 } @INC;
my $path = _nativize
($_);
my($arch_auto_dir, $arch_dir, $version_dir, $version_arch_dir)
++$names{$arch_dir} if -d
$arch_auto_dir;
++$names{$version_dir} if -d
$version_dir;
++$names{$version_arch_dir} if -d
$version_arch_dir;
# Remove ALL instances of each named directory.
@INC = grep { !exists $names{$_} } @INC;
my($arch_auto_dir, $arch_dir, $version_dir, $version_arch_dir);
# we could use this for all platforms in the future, but leave it
# Mac-only for now, until there is more time for testing it.
$arch_auto_dir = File
::Spec
->catdir( $dir, $archname, 'auto' );
$arch_dir = File
::Spec
->catdir( $dir, $archname, );
$version_dir = File
::Spec
->catdir( $dir, $version );
$version_arch_dir = File
::Spec
->catdir( $dir, $version, $archname );
$arch_auto_dir = "$dir/$archname/auto";
$arch_dir = "$dir/$archname";
$version_dir = "$dir/$version";
$version_arch_dir = "$dir/$version/$archname";
return($arch_auto_dir, $arch_dir, $version_dir, $version_arch_dir);
if ($Is_MacOS && $Mac_FS && ! -d
$dir) {
$dir = Mac
::FileSpec
::Unixish
::nativize
($dir);
$dir .= ":" unless $dir =~ /:$/;
lib - manipulate @INC at compile time
This is a small simple module which simplifies the manipulation of @INC
It is typically used to add extra directories to perl's search path so
that later C<use> or C<require> statements will find modules which are
not located on perl's default search path.
=head2 Adding directories to @INC
The parameters to C<use lib> are added to the start of the perl search
is I<almost> the same as saying
BEGIN { unshift(@INC, LIST) }
For each directory in LIST (called $dir here) the lib module also
checks to see if a directory called $dir/$archname/auto exists.
If so the $dir/$archname directory is assumed to be a corresponding
architecture specific directory and is added to @INC in front of $dir.
To avoid memory leaks, all trailing duplicate entries in @INC are
=head2 Deleting directories from @INC
You should normally only add directories to @INC. If you need to
delete directories from @INC take care to only delete those which you
added yourself or which you are certain are not needed by other modules
in your script. Other modules may have added directories which they
need for correct operation.
The C<no lib> statement deletes all instances of each named directory
For each directory in LIST (called $dir here) the lib module also
checks to see if a directory called $dir/$archname/auto exists.
If so the $dir/$archname directory is assumed to be a corresponding
architecture specific directory and is also deleted from @INC.
=head2 Restoring original @INC
When the lib module is first loaded it records the current value of @INC
in an array C<@lib::ORIG_INC>. To restore @INC to that value you
In order to keep lib.pm small and simple, it only works with Unix
filepaths. This doesn't mean it only works on Unix, but non-Unix
users must first translate their file paths to Unix conventions.
# VMS users wanting to put [.stuff.moo] into
In the future, this module will likely use File::Spec for determining
paths, as it does now for Mac OS (where Unix-style or Mac-style paths
work, and Unix-style paths are converted properly to Mac-style paths
before being added to @INC).
FindBin - optional module which deals with paths relative to the source file.
Tim Bunce, 2nd June 1995.