Add option to disable built-in aes implementation.
For time being, there are only two aes implementations for known
architectures. I define runtime detection function as const when
built-in was disabled. In this case, compiler will remove dead
built-in code.
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
diff --git a/library/aesni.h b/library/aesni.h
index 82947e4..fa1f369 100644
--- a/library/aesni.h
+++ b/library/aesni.h
@@ -88,7 +88,11 @@
*
* \return 1 if CPU has support for the feature, 0 otherwise
*/
+#if !defined(MBEDTLS_AES_HAS_NO_BUILTIN)
int mbedtls_aesni_has_support(unsigned int what);
+#else
+#define /* no-check-names */ mbedtls_aesni_has_support(what) 1
+#endif
/**
* \brief Internal AES-NI AES-ECB block encryption and decryption