--- Makefile.orig	2019-12-03 10:58:12 UTC
+++ Makefile
@@ -37,7 +37,7 @@ else ifeq ($(OSTYPE),beos)
   # BeOS (obsolete)
   LIBS += -lnet
 else ifeq ($(OSTYPE),freebsd)
-  CFLAGS  += -I/usr/local/include
+  CFLAGS  += -isystem ${LOCALBASE}/include
 else ifeq ($(OSTYPE),haiku)
   # Haiku (needs to activate the GCC 4x)
   LIBS += -lnetwork -lbe
@@ -84,7 +84,6 @@ ifdef OPTIMISE
     endif
   endif
 else
-  CFLAGS += -O
 endif
 
 ifdef DEBUG