* Inspired by Daniel J. Bernstein's public domain nistp224 implementation
* and Adam Langley's public domain 64-bit C implementation of curve25519
*/
-#ifdef EC_NISTP224_64_GCC_128
+#include <openssl/opensslconf.h>
+#ifndef OPENSSL_NO_EC_NISTP224_64_GCC_128
#include <stdint.h>
#include <string.h>
#include <openssl/err.h>