$ perl -v

This is perl, v5.6.2 built for i686-linux
# should be 5.8.x for you
[snip]

$ perl -MSocket -e 'print $Socket::VERSION, $/';
1.72
$ perl -MEnmac::Transaction  -e 'print $Socket::VERSION, $/';
Can't locate Enmac/Transaction.pm in @INC (@INC contains: /usr/local/lib/perl5/5.6.2/i686-linux /usr/local/lib/perl5/5.6.2 /usr/local/lib/perl5/site_perl/5.6.2/i686-linux /usr/local/lib/perl5/site_perl/5.6.2 /usr/local/lib/perl5/site_perl .).
BEGIN failed--compilation aborted.
$

##</code><code>##

[root@devel3 perl-5.8.3]# grep -R "#define dXSUB_SYS" ./*
./dosish.h:#define dXSUB_SYS
./epoc/epocish.h:#define dXSUB_SYS
./mpeix/mpeixish.h:#define dXSUB_SYS
./os2/os2ish.h:#define dXSUB_SYS OS2_XS_init()
./plan9/plan9ish.h:#define dXSUB_SYS
./unixish.h:#define dXSUB_SYS
./vms/vmsish.h:#define dXSUB_SYS
[root@devel3 perl-5.8.3]#