#include <mach/machine/ndr_def.h> not included by <mach/mach.h> — include it explicitly
Mach › Architecture

mach/machine/ndr_def.h

_MACH_MACHINE_NDR_DEF_H

This header declares nothing itself under the arm64 configuration; it groups the headers below.

mach/arm/ndr_def.hNDR record for Intel x86s