check CONFIG_SCHED_INSTRUMENTATION for print_load_nuttx

src/modules/load_mon/load_mon.cpp

@@ -58,6 +58,10 @@
 #include <uORB/topics/cpuload.h>
 #include <uORB/topics/task_stack_info.h>
 
+#if defined(__PX4_NUTTX) && !defined(CONFIG_SCHED_INSTRUMENTATION)
+#  error load_mon support requires CONFIG_SCHED_INSTRUMENTATION
+#endif
+
 extern struct system_load_s system_load;
 
 #define STACK_LOW_WARNING_THRESHOLD 300 ///< if free stack space falls below this, print a warning

src/modules/logger/watchdog.cpp

@@ -35,6 +35,10 @@
 
 #include <px4_log.h>
 
+#if defined(__PX4_NUTTX) && !defined(CONFIG_SCHED_INSTRUMENTATION)
+#  error watchdog support requires CONFIG_SCHED_INSTRUMENTATION
+#endif
+
 using namespace time_literals;
 
 namespace px4

src/modules/systemlib/print_load_nuttx.c

@@ -46,6 +46,8 @@
 #include <systemlib/printload.h>
 #include <drivers/drv_hrt.h>
 
+#if defined(CONFIG_SCHED_INSTRUMENTATION)
+
 extern struct system_load_s system_load;
 
 #define CL "\033[K" // clear line
@@ -380,3 +382,5 @@ void print_load(uint64_t t, int fd, struct print_load_s *print_state)
 
 	print_load_buffer(t, data.buffer, sizeof(data.buffer), print_load_callback, &data, print_state);
 }
+
+#endif // if CONFIG_SCHED_INSTRUMENTATION