Not all platforms have the OpenBSD crypto device.

crypto/evp/openbsd_hw.c

diff --git a/crypto/evp/openbsd_hw.c b/crypto/evp/openbsd_hw.c
index 012856a..61f6772 100644
--- a/crypto/evp/openbsd_hw.c
+++ b/crypto/evp/openbsd_hw.c
@@ -46,6 +46,8 @@
  * OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+#ifdef OPENSSL_OPENBSD_DEV_CRYPTO
+
 #include <fcntl.h>
 #include <stdio.h>
 #include <errno.h>
@@ -188,3 +190,5 @@
 		     EVP_CIPHER_set_asn1_iv,
 		     EVP_CIPHER_get_asn1_iv,
 		     NULL)
+
+#endif