What version of Go are you using (go version)?

devel 1.8

What operating system and processor architecture are you using (go env)?

Windows

What did you do?

(paraphrasing a verbal bug report from Quentin)
Try to build Go on windows with newer versions of gcc, in this case gcc 5.3.

Because gcc is run -Werror, newer warnings cause the build to fail.
In particular, passing the address of a "volatile long" (64-bit) to InterlockedExchangeAdd, InterlockedIncrement, and InterlockedDecrement produces a warning because they expect the address of a "volatile LONG" (32-bit).

See also https://msdn.microsoft.com/en-us/library/windows/desktop/ms683597(v=vs.85).aspx