3rdparty: Add config checks for Everest
diff --git a/include/mbedtls/check_config.h b/include/mbedtls/check_config.h
index 04c8eba..1bf4229 100644
--- a/include/mbedtls/check_config.h
+++ b/include/mbedtls/check_config.h
@@ -130,6 +130,11 @@
#error "MBEDTLS_ECP_RESTARTABLE defined, but not MBEDTLS_ECDH_LEGACY_CONTEXT"
#endif
+#if defined(MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED) && \
+ defined(MBEDTLS_ECDH_LEGACY_CONTEXT)
+#error "MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED defined, but MBEDTLS_ECDH_LEGACY_CONTEXT not disabled"
+#endif
+
#if defined(MBEDTLS_ECDSA_DETERMINISTIC) && !defined(MBEDTLS_HMAC_DRBG_C)
#error "MBEDTLS_ECDSA_DETERMINISTIC defined, but not all prerequisites"
#endif