../packages/mymqtt-latest/MQTTClient-C/mqtt_client.c:31:23: fatal error: dfs_posix.h: No such file or directory

../packages/mbedtls-v2.7.10/ports/src/tls_net.c:298:27: error: 'F_GETFL' undeclared (first use in this function)
../packages/mbedtls-v2.7.10/ports/src/tls_net.c:298:38: error: 'O_NONBLOCK' undeclared (first use in this function)