diff -up keen/src/Makefile.noSDLmain keen/src/Makefile

--- keen/src/Makefile.noSDLmain	2012-09-07 15:48:18.645302133 -0400

+++ keen/src/Makefile	2012-09-07 15:48:27.746305283 -0400

@@ -36,7 +36,7 @@ keen:  main.o sanity.o game.o gamedo.o \

 	 ai/autoray.o ai/gotpoints.o sdl/keydrv.o sdl/snddrv.o sdl/timedrv.o \

 	 sdl/viddrv.o scale2x/scalebit.o scale2x/scale2x.o scale2x/scale3x.o scale2x/pixel.o \

 	 platform.o \

-	 -lSDL -lSDLmain -lstdc++

+	 -lSDL -lstdc++ -lm

 main.o:	main.c main.fdh keen.h osparam.h \

 		sounds.h latch.h game.h \