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

mach/machine/sdt_isa.h

_BSD_MACHINE_SDT_ISA_H_

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

mach/arm/sdt_isa.hOnly define when testing. This makes the calls into actual calls to