patch by Jörg Krause.
@@ -72,6 +72,7 @@ int setns(int, int);
void *memcpy(void *__restrict, const void *__restrict, size_t);
int memcmp(const void *, const void *, size_t);
+void *memset (void *, int, size_t);
void *calloc(size_t, size_t);
void free(void *);