Sendmail, 3rd Edition

To Port, Tune, or Debug

In Table 3-2, we list all the compile-time macros that are available.

Note that the Tune column of Table 3-2 recommends whether you should adjust (tune) the values for any particular macro. Those marked tune can be adjusted from within your Build m4 file. Those marked with port should be changed only in the rare event that you need to port sendmail to a new operating system.^[2] Those marked with debug should be defined only during porting to help debug the new binary but (for security reasons) should never be defined for the final production version.

Also note that the -d column shows which debugging switches (-d0.1) can be used to determine whether the corresponding compile-time macro was defined when the sendmail binary was compiled. For most, if the name appears in the output, it was defined with a non-zero value.

Table 3-2. #define Macros for Compiling sendmail

Compile-time macro	§	Tune	-d	Description
ARBPTR_T	...T	port		How to cast an arbitrary pointer
AUTO_NIS_ALIASES	AUTO_NIS_ALIASES	tune	0.10	Add fallback alias techniques
BROKEN_RES_SEARCH	...IS_BROKEN	port		Broken resolver fix (e.g., Ultrix)
BSD4_3	BSD4_3	port		BSD 4.3-style signal handling
BSD4_4	BSD4_4	port		Compile for BSD 4.4 Unix
DATA_PROGRESS_TIMEOUT	DATA_PROGRESS_TIMEOUT	tune		Timeout inbound DATA phase
DNSMAP	DNSMAP	tune	0.1	Enable use of dns databases
DSN	DSN	tune		Support DSN
EGD	EGD	port	0.1	Enable use of the EGD daemon
ERRLIST_PREDEFINED