This is version 2009070801 of Digest::Trivial, an XS module doing trivial, but fast mapping of strings to integer 0 .. 255. You need a C compiler to be able to install the module using the classic steps: perl Makefile.PL make make test make install Alternatively, you can install binaries someone else compiled for you. The development version can be retrieved from github: git://github.com/Abigail/Digest--Trivial.git Abigail, digest-trivial@abigail.be