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

Don't ovewrite memory when allocating or freeing

-DISC_MEM_FILL=0 it; this improves performance but makes

debugging more difficult.

Don't track memory allocations by file and line

-DISC_MEM_TRACKLINES=0 number; this improves performance but makes

debugging more difficult.

-DISC_FACILITY=LOG_LOCAL0 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,lwresd}/

Enable DNSSEC signature chasing support in dig.

-DDIG_SIGCHASE=1 (Note: This feature is deprecated. Use delv

instead.)

Increase the maximum number of configurable

-DNS_RPZ_MAX_ZONES=64 response policy zones from 32 to 64; this is the

highest possible setting

-DISC_HEAP_CHECK Test heap consistency after every heap

operation; used when debugging

Disable the use of inline functions to implement

-DISC_BUFFER_USEINLINE=0 the isc_buffer API: this reduces performance but

may be useful when debugging