Add compile-time guard MBEDTLS_SSL_PREVERIFY_CB for pre-verify callback
diff --git a/include/mbedtls/check_config.h b/include/mbedtls/check_config.h
index be80332..845a299 100644
--- a/include/mbedtls/check_config.h
+++ b/include/mbedtls/check_config.h
@@ -600,6 +600,11 @@
 #error "MBEDTLS_SSL_SERVER_NAME_INDICATION defined, but not all prerequisites"
 #endif
 
+#if defined(MBEDTLS_SSL_PREVERIFY_CB) && \
+        !defined(MBEDTLS_X509_CRT_PARSE_C)
+#error "MBEDTLS_SSL_PREVERIFY_CB defined, but not all prerequisites"
+#endif
+
 #if defined(MBEDTLS_THREADING_PTHREAD)
 #if !defined(MBEDTLS_THREADING_C) || defined(MBEDTLS_THREADING_IMPL)
 #error "MBEDTLS_THREADING_PTHREAD defined, but not all prerequisites"