Thanks syphilis, that did the trick!

I found the check library in: 

/usr/local/lib/perl5/site_perl/5.12.1/cygwin-thread-multi-64int/auto/B
+/Hooks/OP/Check

[download]

The Makefile had no EXTRALIBS or LDLOADLIBS settings, so I added them per your suggestion and the module built and installed correctly. Interestingly, I also found this line in the Makefile: 

#     LIBS => q[-L/usr/local/lib/perl5/site_perl/5.12.1/cygwin-thread-
+multi-64int/auto/B/Hooks/OP/Check -lCheck]

[download]
...so at some point it did know where the library was, but didn't actually use it. I tried to install MooseX::Declare again and got the same failure when it got to Devel::Declare, which I resolved the same way. Afterwards the install completed without problems. Not sure if the underlying problem is a bug in the tool chain, a bug in Cygwin, or just some strangeness with my system, but everything seems to be working now.

In reply to Re^2: Error with ExtUtils::Depends under Cygwin by newleaf
in thread Error with ExtUtils::Depends under Cygwin by newleaf

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