diff –git a/Makefile b/Makefile
index a0c25f4..87d70d6 100644
— a/Makefile
+++ b/Makefile
@@ -56,7 +56,7 @@ BUILDHOST = $(shell hostname -f)
BUILDUSER = $(USER)

CC = g++
-CFLAGS = -O99 -g3 -fpic -march=core2 -falign-functions=16 -funit-at-a-time -minline-all-stringops -fno-trapping-math -fno-exceptions -fno-rtti -mpreferred-stack-boundary=4 -fno-strict-aliasing -Wreturn-type -mno-red-zone
+CFLAGS = -O99 -g3 -fpic -march=core2 -falign-functions=16 -funit-at-a-time -minline-all-stringops -fno-trapping-math -fno-exceptions -fno-rtti -mpreferred-stack-boundary=4 -fno-strict-aliasing -Wreturn-type -mno-red-zone -fno-stack-protector
KVMVER = 86
QEMUDIR = ../qemu-kvm-ptlsim
INCFLAGS = -Iinclude -I. -I$(QEMUDIR)/kvm/include -I$(QEMUDIR)/kvm/include/x86 -DPTLSIM_HYPERVISOR -DPTLSIM_KVM -D__INSIDE_PTLSIM__ \
diff –git a/lib/klibc.cpp b/lib/klibc.cpp
index ae0f75b..3b5c5c0 100644
— a/lib/klibc.cpp
+++ b/lib/klibc.cpp
@@ -842,7 +842,7 @@ int strncmp(const char *cs, const char *ct, size_t count)
* @s: The string to be searched
* @c: The character to search for
*/
-char *strchr(const char *s, int c)
+const char *strchr(const char *s, int c)
{
for (; *s != (char)c; ++s)
if (*s == ‘\0′)
@@ -858,7 +858,7 @@ char *strchr(const char *s, int c)
* @s: The string to be searched
* @c: The character to search for
*/
-char *strrchr(const char *s, int c)
+const char *strrchr(const char *s, int c)
{
const char *p = s + strlen(s);
do {
@@ -877,7 +877,7 @@ char *strrchr(const char *s, int c)
* @count: The number of characters to be searched
* @c: The character to search for
*/
-char *strnchr(const char *s, size_t count, int c)
+const char *strnchr(const char *s, size_t count, int c)
{
for (; count– && *s != ‘\0′; ++s)
if (*s == (char)c)
@@ -976,7 +976,7 @@ size_t strcspn(const char *s, const char *reject)
* @cs: The string to be searched
* @ct: The characters to search for
*/
-char *strpbrk(const char *cs, const char *ct)
+const char *strpbrk(const char *cs, const char *ct)
{
const char *sc1, *sc2;

@@ -1146,7 +1146,7 @@ void *memscan(void *addr, int c, size_t size)
* @s1: The string to be searched
* @s2: The string to search for
*/
-char *strstr(const char *s1, const char *s2)
+const char *strstr(const char *s1, const char *s2)
{
int l1, l2;

@@ -1175,7 +1175,7 @@ char *strstr(const char *s1, const char *s2)
* returns the address of the first occurrence of @c, or %NULL
* if @c is not found
*/
-void *memchr(const void *s, int c, size_t n)
+const void *memchr(const void *s, int c, size_t n)
{
const unsigned char *p = (unsigned char*)s;
while (n– != 0) {