reorder compiler arguments and add -lm to keep Linux happy

Makefile

@@ -1,7 +1,7 @@
 CFLAGS = -g
 CPPFLAGS = -I/opt/local/include
 LDFLAGS = -L/opt/local/lib
-LDLIBS = -lgc
+LDLIBS = -lgc -lm
 
 all : main
 
@@ -9,7 +9,7 @@ all : main
 	leg -o $@ $<
 
 % : %.c
-	cc $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) $(LDLIBS) -o $@ $<
+	class="k">$(CCclass="k">) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) -o $@ $< $(LDLIBS)
 
 test : main
 	./main -vv test.txt