1 files changed, 3 insertions, 0 deletions

diff --git a/Makefile b/Makefile
index 6b878cc1..f26eeace 100644
--- a/Makefile
+++ b/Makefile
@@ -43,6 +43,9 @@ KLIBC_GCC = gcc -nostdinc -iwithprefix include -I$(KLIBC)/klibc/include -I$(KLIB
 CC = $(CROSS_COMPILE)gcc
 CXFLAGS = -ggdb
 CWFLAGS = -Wall -Werror -Wstrict-prototypes
+ifdef WARN_UNUSED
+CWFLAGS += -Wp,-D_FORTIFY_SOURCE=2 -O
+endif
 
 ifdef DEBIAN
 CPPFLAGS= -DDEBIAN