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So these are all warnings only? I'm not sure I want to risk
breaking compilation on other systems to get rid of these
warnings this late in the beta cycle. 

When you say you have used this: Do you mean in combination
with OpenSSH, or with Python?

On the "how it works" issue: How precisely does it cause the
compiler to produce a status code? I.e. what in the test
program does it assume to give an error? In particular: Why
does it call getpeername?