Add -lm compiler flag. Remove -ffast-math which causes errors handling INF/NaN values.

Author: Iain Bancarz

Makefile

@@ -51,13 +51,14 @@ LIBS=Gtc.o win2unix.o Sim.o
 
 CC=/usr/bin/g++
 
+# do NOT use -ffast-math, as it causes errors in infinity/NaN handling
 ifeq ($(DEBUG),y)
-	CFLAGS=-g -Wall -fPIC -O0 -ffast-math -I$(STLPORT_INC)
+	CFLAGS=-g -Wall -fPIC -O0 -I$(STLPORT_INC)
 else
-	CFLAGS=-Wall -fPIC -O3 -ffast-math -I$(STLPORT_INC)
+	CFLAGS=-Wall -fPIC -O3 -I$(STLPORT_INC)
 endif
 # Set runpath instead of relying on LD_LIBRARY_PATH
-LDFLAGS=-Wl,-rpath -Wl,$(STLPORT_LIB) -L$(STLPORT_LIB) -lstlport
+LDFLAGS=-Wl,-rpath -Wl,$(STLPORT_LIB) -L$(STLPORT_LIB) -lstlport -lm
 
 default: all