---
title: Enabling flags
---

- `MG_ENABLE_CGI` Enable CGI support
- `MG_ENABLE_SSL` Enable SSL/TLS support (OpenSSL API)
- `MG_ENABLE_IPV6` Enable IPV6 support
- `MG_ENABLE_MQTT` enable MQTT client
- `MG_ENABLE_MQTT_BROKER` enable MQTT broker
- `MG_ENABLE_DNS_SERVER` enable DNS server
- `MG_ENABLE_COAP` enable CoAP protocol
- `MG_ENABLE_HTTP_WEBDAV` enable WebDAV extensions to HTTP
- `MG_ENABLE_GETADDRINFO` enable `getaddrinfo()` in `mg_resolve2()`
- `MG_ENABLE_THREADS` enable `mg_start_thread()` API