I can confirm that this isn't due to having multiple Perl instances on the system. I can also confirm it isn't related to just the PDL versions of Strawberry.

The Testers matrix shows nothing but failure on Windows platforms, and I've tried numerous things to get it to work (adding #include <cstring> and using namespace std;, removing all instances of Perl and installing just one, trying Perl versions that aren't listed in the failures etc) to no avail.

So there's something else weird going on that I couldn't figure out with the time I had to troubleshoot.