making operators from garbage

lib/Makefile

@@ -4,7 +4,7 @@
 
 COPT = -Wall -fpic -g -pg -no-pie  -DDEBUG_LEVEL=0
 OBJS = fimg-core.o fimg-pnm.o fimg-file.o fimg-math.o	\
-	fimg-timers.o
+	fimg-timers.o operators.o
 DEPS = Makefile ../floatimg.h
 
 # modify it 'as you like'
@@ -13,7 +13,7 @@ AR=ar
 all:	$(OBJS) ../libfloatimg.a
 
 t:	t.c ../libfloatimg.a $(DEPS)
-	gcc $(COPT) $< ../libfloatimg.a -o $@
+	gcc $(COPT) $< ../libfloatimg.a -lm -o $@
 
 # --------------------------------------------
 
@@ -23,6 +23,9 @@ t:	t.c ../libfloatimg.a $(DEPS)
 fimg-core.o:	fimg-core.c $(DEPS)
 	gcc $(COPT) -c $<
 
+operators.o:	operators.c $(DEPS)
+	gcc $(COPT) -c $<
+
 fimg-pnm.o:	fimg-pnm.c $(DEPS)
 	gcc $(COPT) -c $<