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Build instructions:
-------------------

1. Install the Geo-Calc-XS module if not installed already

2. Extract the Geo-Calc-XS-0.25.tar.gz into directory Geo-Calc-XS-0.25

3. cd Geo-Calc-XS-0.25

4. perl Makefile.PL

5. make

6. make test

7. make install