-void TRACE_msg_process_create (const char *process_name, int process_pid, msg_host_t host);
-void TRACE_msg_process_destroy (const char *process_name, int process_pid, msg_host_t host);
-void TRACE_msg_process_kill(smx_process_exit_status_t status, msg_process_t process);
-void TRACE_msg_process_suspend(msg_process_t process);
-void TRACE_msg_process_resume(msg_process_t process);
-void TRACE_msg_process_sleep_in(msg_process_t process); //called from msg/gos.c
-void TRACE_msg_process_sleep_out(msg_process_t process);
-void TRACE_msg_process_end(msg_process_t process);
+XBT_PRIVATE void TRACE_msg_process_create (const char *process_name, int process_pid, msg_host_t host);
+XBT_PRIVATE void TRACE_msg_process_destroy (const char *process_name, int process_pid, msg_host_t host);
+XBT_PRIVATE void TRACE_msg_process_kill(smx_process_exit_status_t status, msg_process_t process);
+XBT_PRIVATE void TRACE_msg_process_suspend(msg_process_t process);
+XBT_PRIVATE void TRACE_msg_process_resume(msg_process_t process);
+XBT_PRIVATE void TRACE_msg_process_sleep_in(msg_process_t process); //called from msg/gos.c
+XBT_PRIVATE void TRACE_msg_process_sleep_out(msg_process_t process);
+XBT_PRIVATE void TRACE_msg_process_end(msg_process_t process);