1<!-- 2 - Copyright (C) Internet Systems Consortium, Inc. ("ISC") 3 - 4 - This Source Code Form is subject to the terms of the Mozilla Public 5 - License, v. 2.0. If a copy of the MPL was not distributed with this 6 - file, You can obtain one at http://mozilla.org/MPL/2.0/. 7 - 8 - See the COPYRIGHT file distributed with this work for additional 9 - information regarding copyright ownership. 10--> 11Setting the `STD_CDEFINES` environment variable before running `configure` 12can be used to enable certain compile-time options that are not explicitly 13defined in `configure`. 14 15Some of these settings are: 16 17|Setting |Description | 18|-----------------------------------|----------------------------------------| 19|`-DISC_MEM_DEFAULTFILL=1`|Overwrite memory with tag values when allocating or freeing it; this impairs performance but makes debugging of memory problems easier.| 20|`-DISC_MEM_TRACKLINES=0`|Don't track memory allocations by file and line number; this improves performance but makes debugging more difficult.| 21|<nobr>`-DISC_FACILITY=LOG_LOCAL0`</nobr>|Change the default syslog facility for `named`| 22|`-DNS_CLIENT_DROPPORT=0`|Disable dropping queries from particular well-known ports:| 23|`-DCHECK_SIBLING=0`|Don't check sibling glue in `named-checkzone`| 24|`-DCHECK_LOCAL=0`|Don't check out-of-zone addresses in `named-checkzone`| 25|`-DNS_RUN_PID_DIR=0`|Create default PID files in `${localstatedir}/run` rather than `${localstatedir}/run/named/`| 26|`-DISC_BUFFER_USEINLINE=0`|Disable the use of inline functions to implement the `isc_buffer` API: this reduces performance but may be useful when debugging | 27|`-DISC_HEAP_CHECK`|Test heap consistency after every heap operation; used when debugging| 28