Per http://search.cpan.org/dist/perl-5.8.8/pod/perlport.pod (which is supposed to be the authoritative source for this sort of information):
link

Not implemented. (Mac OS, MPE/iX, VMS, RISC OS)

Link count not updated because hard links are not quite that hard (They are sort of half-way between hard and soft links). (AmigaOS)

Hard links are implemented on Win32 (Windows NT and Windows 2000) under NTFS only.

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In reply to Re: ActivePerl 5.8 Documentation Discrepancy: "Unimplemented" link Function by ysth
in thread ActivePerl 5.8 Documentation Discrepancy: "Unimplemented" link Function by Jim

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