Writing Makefile for XML::Simple
Makefile out-of-date with respect to C:\strawberry\perl\lib\Config.pm 
+C:\strawberry\perl\lib\CORE\config.h
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Since the newly written Makefile is out-of-date with respect to some files which should definitely have been created/modified earlier, it seems there's something fishy with your system clock...  Maybe check the timestamps and set your clock correctly.