sendmail, 4th 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 with 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.^[51] 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 (The Syntax of -d on page 530) 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 nonzero value.

Table 3-2. #define macros for compiling sendmail

Compile-time macro	§	Tune	-d	Description
ARBPTR_T	...T on page 148	Port		How to cast an arbitrary pointer.
AUTO_NIS_ALIASES	AUTO_NIS_ALIASES on page 109	Tune	0.10	Add fallback alias techniques.
BROKEN_RES_SEARCH	...IS_BROKEN on page 117	Port		Broken resolver fix (e.g., Ultrix).
BSD4_3	BSD4_3 on page 109	Port		BSD 4.3-style signal handling.
BSD4_4	BSD4_4 on page 110	Port		Compile for BSD 4.4 Unix.
DATA_PROGRESS_TIMEOUT	DATA_PROGRESS_TIMEOUT on page 110	Tune		Timeout inbound DATA phase.
DNSMAP	DNSMAP on page 110	Tune	0.1	Enable use of ...