+int CRYPTO_memcmp(const volatile void * volatile in_a,
+ const volatile void * volatile in_b,
+ size_t len);
+
+/* Standard initialisation options */
+# define OPENSSL_INIT_NO_LOAD_CRYPTO_STRINGS 0x00000001L
+# define OPENSSL_INIT_LOAD_CRYPTO_STRINGS 0x00000002L
+# define OPENSSL_INIT_ADD_ALL_CIPHERS 0x00000004L
+# define OPENSSL_INIT_ADD_ALL_DIGESTS 0x00000008L
+# define OPENSSL_INIT_NO_ADD_ALL_CIPHERS 0x00000010L
+# define OPENSSL_INIT_NO_ADD_ALL_DIGESTS 0x00000020L
+# define OPENSSL_INIT_LOAD_CONFIG 0x00000040L
+# define OPENSSL_INIT_NO_LOAD_CONFIG 0x00000080L
+# define OPENSSL_INIT_ASYNC 0x00000100L
+# define OPENSSL_INIT_ENGINE_RDRAND 0x00000200L
+# define OPENSSL_INIT_ENGINE_DYNAMIC 0x00000400L
+# define OPENSSL_INIT_ENGINE_OPENSSL 0x00000800L
+# define OPENSSL_INIT_ENGINE_CRYPTODEV 0x00001000L
+# define OPENSSL_INIT_ENGINE_CAPI 0x00002000L
+# define OPENSSL_INIT_ENGINE_PADLOCK 0x00004000L
+# define OPENSSL_INIT_ENGINE_DASYNC 0x00008000L
+/* OPENSSL_INIT flag 0x00010000 reserved for internal use */
+/* OPENSSL_INIT flag range 0xfff00000 reserved for OPENSSL_init_ssl() */
+/* Max OPENSSL_INIT flag value is 0x80000000 */
+
+/* openssl and dasync not counted as builtin */
+# define OPENSSL_INIT_ENGINE_ALL_BUILTIN \
+ (OPENSSL_INIT_ENGINE_RDRAND | OPENSSL_INIT_ENGINE_DYNAMIC \
+ | OPENSSL_INIT_ENGINE_CRYPTODEV | OPENSSL_INIT_ENGINE_CAPI | \
+ OPENSSL_INIT_ENGINE_PADLOCK)
+
+
+/* Library initialisation functions */
+void OPENSSL_cleanup(void);
+int OPENSSL_init_crypto(uint64_t opts, const OPENSSL_INIT_SETTINGS *settings);
+int OPENSSL_atexit(void (*handler)(void));
+void OPENSSL_thread_stop(void);
+
+/* Low-level control of initialization */
+OPENSSL_INIT_SETTINGS *OPENSSL_INIT_new(void);
+void OPENSSL_INIT_set_config_filename(OPENSSL_INIT_SETTINGS *settings,
+ const char *config_file);
+void OPENSSL_INIT_free(OPENSSL_INIT_SETTINGS *settings);