--- OMSimulator/OMTLMSimulator/Makefile.head.orig	2022-12-11 03:25:38 UTC
+++ OMSimulator/OMTLMSimulator/Makefile.head
@@ -100,7 +100,12 @@ ifeq ($(detected_OS),Darwin)
 EXTRAFLAGS += -DNO_RTIME
 RTIMELIB =
 else
+ifeq ($(detected_OS),FreeBSD)
+EXTRAFLAGS += -DNO_RTIME
+RTIMELIB =
+else
 RTIMELIB = -lrtime
+endif
 endif
 
 override CC += $(CFLAGS) $(EXTRAFLAGS)