" !defined(__GNUC__) || defined(__MINGW32__)" implies CygWin.
@@ -34,7 +34,7 @@
#include <unistd.h>
#endif
#if defined(WIN32) && !defined(__GNUC__) || defined(__MINGW32__)
#if defined(WIN32) && !defined(__CYGWIN__)
#else /* probably some kind of unix */
#ifdef HAVE_SYS_SOCKET_H
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