C:\Perl\Date-Calc-5.3>perl makefile.pl
Checking if your kit is complete...
Looks good
Warning: prerequisite Bit::Vector failed to load: Can't locate Bit/Vector.pm in @INC (@INC cont
ains: C:/Perl/lib C:/Perl/site/lib .) at (eval 4) line 3.
Writing Makefile for Date::Calc
Writing patchlevel.h for C:\Perl\bin\perl.exe (5.006001).