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diff --git a/OPTIONS.md b/OPTIONS.md new file mode 100644 index 0000000..16029e7 --- /dev/null +++ b/OPTIONS.md @@ -0,0 +1,29 @@ +<!-- +Copyright (C) Internet Systems Consortium, Inc. ("ISC") + +SPDX-License-Identifier: MPL-2.0 + +This Source Code Form is subject to the terms of the Mozilla Public +License, v. 2.0. If a copy of the MPL was not distributed with this +file, you can obtain one at https://mozilla.org/MPL/2.0/. + +See the COPYRIGHT file distributed with this work for additional +information regarding copyright ownership. +--> +Setting the `STD_CDEFINES` environment variable before running `configure` +can be used to enable certain compile-time options that are not explicitly +defined in `configure`. + +Some of these settings are: + +|Setting |Description | +|-----------------------------------|----------------------------------------| +|`-DISC_MEM_DEFAULTFILL=1`|Overwrite memory with tag values when allocating or freeing it; this impairs performance but makes debugging of memory problems easier.| +|`-DISC_MEM_TRACKLINES=0`|Don't track memory allocations by file and line number; this improves performance but makes debugging more difficult.| +|<nobr>`-DISC_FACILITY=LOG_LOCAL0`</nobr>|Change the default syslog facility for `named`| +|`-DNS_CLIENT_DROPPORT=0`|Disable dropping queries from particular well-known ports:| +|`-DCHECK_SIBLING=0`|Don't check sibling glue in `named-checkzone`| +|`-DCHECK_LOCAL=0`|Don't check out-of-zone addresses in `named-checkzone`| +|`-DNS_RUN_PID_DIR=0`|Create default PID files in `${localstatedir}/run` rather than `${localstatedir}/run/named/`| +|`-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 | +|`-DISC_HEAP_CHECK`|Test heap consistency after every heap operation; used when debugging| |