--- examples/Makefile.orig	Wed Mar  8 17:35:04 2017
+++ examples/Makefile	Wed Mar  8 17:36:12 2017
@@ -9,10 +9,10 @@ DEBUG_TARGETS = xor_train_debug xor_test_debug xor_tes
 all: $(TARGETS)
 
 %: %.c Makefile
-	$(GCC) -O3 $< -o $@ -lfann -lm
+	$(GCC) ${CFLAGS} $< -o $@ -lfann -lm
 
 %_fixed: %.c Makefile
-	$(GCC) -O3 -DFIXEDFANN $< -o $@ -lfixedfann -lm
+	$(GCC) ${CFLAGS} -DFIXEDFANN $< -o $@ -lfixedfann -lm
 
 clean:
 	rm -f $(TARGETS) $(DEBUG_TARGETS) xor_fixed.data *.net *~ *.obj *.exe *.tds noscale.txt withscale.txt scale_test_results.txt