TCLLIBRARY = /usr/local/lib/tcl
 TKLIBRARY = /usr/local/lib/tk
 
+SDLINCLUDE = $$(/bin/sh ./sdl_helper cflags)
+SDLLIBS = $$(/bin/sh ./sdl_helper libs)
+
 CC = gcc
 
 OPTFLAGS = -O3
 #OPTFLAGS = -g
 
 #DEFINES = -DIS_LINUX -DCAM -DNET
-DEFINES = -DIS_LINUX
+DEFINES = -DIS_LINUX -DNO_AIRCRASH
 
-CFLAGS = $(OPTFLAGS) $(DEFINES)
+CFLAGS += $(OPTFLAGS) $(DEFINES)
 
 #LDFLAGS = -Bstatic
 LDFLAGS=-L/usr/X11/lib -L/usr/X11R6/lib
        -I$(XINCLUDE) \
        -I$(TCLHOME) \
        -I$(TCLXHOME)/src \
-       -I$(TKHOME)
+       -I$(TKHOME) \
+       $(SDLINCLUDE)
 
 CPPFLAGS = $(INCLUDES)
 
        -lm \
         -lX11 \
         -lXext \
-       -lXpm
+       -lXpm \
+       $(SDLLIBS)
 
 SRCS = \
        sim.c \