I can assure you that the 5.8.8 installation I have to deal with does not have it. I looked for it, both with Perl and with locate.
perl -MB -e print
Can't locate B.pm in @INC (@INC contains: /usr/lib/perl5/site_perl/5.8
+.8/i386-linux-thread-multi /usr/lib/perl5/site_perl/5.8.3/i386-linux-
+thread-multi /usr/lib/perl5/site_perl/5.8.8 /usr/lib/perl5/site_perl/
+5.8.3 /usr/lib/perl5/site_perl /usr/lib/perl5/vendor_perl/5.8.8/i386-
+linux-thread-multi /usr/lib/perl5/vendor_perl/5.8.3/i386-linux-thread
+-multi /usr/lib/perl5/vendor_perl/5.8.8 /usr/lib/perl5/vendor_perl/5.
+8.3 /usr/lib/perl5/vendor_perl /usr/lib/perl5/5.8.8/i386-linux-thread
+-multi /usr/lib/perl5/5.8.8 .).
BEGIN failed--compilation aborted.