--- /dev/null
+#ifndef CEPH_SOCK_COMPAT_H
+#define CEPH_SOCK_COMPAT_H
+
+#include "include/compat.h"
+
+/*
+ * This optimization may not be available on all platforms (e.g. OSX).
+ * Apparently a similar approach based on TCP_CORK can be used.
+ */
+#ifndef MSG_MORE
+# define MSG_MORE 0
+#endif
+
+/*
+ * On BSD SO_NOSIGPIPE can be set via setsockopt to block SIGPIPE.
+ */
+#ifndef MSG_NOSIGNAL
+# define MSG_NOSIGNAL 0
+# ifdef SO_NOSIGPIPE
+# define CEPH_USE_SO_NOSIGPIPE
+# else
+# define CEPH_USE_SIGPIPE_BLOCKER
+# warning "Using SIGPIPE blocking instead of suppression; this is not well-tested upstream!"
+# endif
+#endif
+
+#endif