Beginning with V8.12, the per-operating-system compile-time macros were removed from the sendmail/conf.h file, and were moved into the include/sm/conf.h file. In addition to moving them, they were also all prefixed with the characters SM_.

These compile-time macros are most certainly defined correctly for your operating system. In the rare event you are porting sendmail to a new operating system, you might need to tune these on a selective basis:

SM_CONF_BROKEN_SIZE_T

On most systems, the size_t type is defined as an unsigned variable. When porting, if that is not the case on your system, define this compile-time macro:

APPENDDEF(`confENVDEF', `-DSM_CONF_BROKEN_SIZE_T=1')

SM_CONF_BROKEN_STRTOD

The sendmail program uses printf(3) and scanf(3) with double-precision conversions, which will cause them to return improper results on some operating systems. When porting, if your operating system returns improper results, you can define this compile-time macro:

APPENDDEF(`confENVDEF', `-DSM_CONF_BROKEN_STRTOD=1')

See libsm/t-float.c to discover how to detect if this is needed.

SM_CONF_GETOPT

The sendmail program, and all its companion programs, use the getopt(3) routine to parse command-line arguments. When porting, if your compiler library lacks a getopt(3) routine, define this compile-time macro with a value of zero:

APPENDDEF(`confENVDEF', `-DSM_CONF_GETOPT=0')

SM_CONF_LDAP_MEMFREE

When porting, if your LDAP library includes the ldap_memfree(3) routine, you can define this compile-time macro:

APPENDDEF(`confENVDEF', `-DSM_CONF_LDAP_MEMFREE=1')

SM_CONF_LONGLONG

The 1999 ISO C-language standard defines a long long type. When porting, if your compiler supports this type, define this compile-time macro:

APPENDDEF(`confENVDEF', `-DSM_CONF_LONGLONG=1')

SM_CONF_MEMCHR

When porting, if your C-language library includes the memchr(3) routine, define this compile-time macro:

APPENDDEF(`confENVDEF', `-DSM_CONF_MEMCHR=1')

SM_CONF_MSG

When porting, if your system supports System V IPC message queues, you can define this compile-time macro:

APPENDDEF(`confENVDEF', `-DSM_CONF_MSG=1')

SM_CONF_QUAD_T

When porting, if your C-language compiler lacks the long long type, but your /usr/include/sys/types.h file defines quad_t as a struct, you can define this compile-time macro:

APPENDDEF(`confENVDEF', `-DSM_CONF_QUAD_T=1')

SM_CONF_SEM

When porting, if your system supports System V IPC semaphores, you can define this compile-time macro:

APPENDDEF(`confENVDEF', `-DSM_CONF_SEM=1')

SM_CONF_SETITIMER

When porting, if the setitimer(2) function is missing from your C-language library, you can define this compile-time macro with a value of zero:

APPENDDEF(`confENVDEF', `-DSM_CONF_SETITIMER=0')

SM_CONF_SHM

When tuning your system, if System V shared memory is available on your machine, you can define this compile-time macro:

APPENDDEF(`confENVDEF', `-DSM_CONF_SHM=1')

See SM_CONF_SHM for a full description of this compile-time macro.

SM_CONF_SHM_DELAY

This compile-time macro is defined in libsm/config.c, but not otherwise used in the V8.12 source.

SM_CONF_SSIZE_T

When porting, if your /usr/include/sys/type.h file lacks a definition for ssize_t, you may define this compile-time macro to zero:

APPENDDEF(`confENVDEF', `-DSM_CONF_SSIZE_T=0')

SM_CONF_STDBOOL_H

When porting, if the /usr/include/stdbool.h file exists and defines the three macros true, false, and bool, you can define this compile-time macro:

APPENDDEF(`confENVDEF', `-DSM_CONF_STDBOOL_H=1')

SM_CONF_STDDEF_H

When porting, if the /usr/include/stddef.h file does not exist, define this compile-time macro as zero:

APPENDDEF(`confENVDEF', `-DSM_CONF_STDDEF_H=0')

SM_CONF_STRL

When porting, if the strlcpy(3) and strlcat(3) C-language library routines are available, first define this compile-time macro with a value of 1:

APPENDDEF(`confENVDEF', `-DSM_CONF_STRL=1')  use the library routines

Then, compile and run the benchmark program libsm/b-strl.c. If the benchmark program's output shows that the libsm-provided versions of those routines are faster, redefine SM_CONF_STRL to zero (the default):

APPENDDEF(`confENVDEF', `-DSM_CONF_STRL=0')  if b-strl.c shows libsm versions faster

SM_CONF_SYS_CDEFS_H

When porting, if the /usr/include/sys/cdefs.h file exists, and if that file defines _ _P, you should define this compile-time macro:

APPENDDEF(`confENVDEF', `-DSM_CONF_SYS_CDEFS_H=1')

If you misdefine SM_CONF_SYS_CDEFS_H, you will see warnings, when building, about _ _P being defined multiple times.

SM_CONF_SYSEXITS_H

When porting, if the /usr/include/sysexits.h file exists and defines the various EX_ macros differently than the include/sm/sysexits.h file does, define this compile-time macro:

APPENDDEF(`confENVDEF', `-DSM_CONF_SYSEXITS_H=1')

SM_CONF_UID_GID

When porting, if the file /usr/include/sys/types.h file does not define uid_t and gid_t, define this compile-time macro as zero:

APPENDDEF(`confENVDEF', `-DSM_CONF_UID_GID=0')

SM_HEAP_CHECK

When porting or tuning, you might find it desirable to turn on memory-leak detection by defining this compile-time macro:

APPENDDEF(`confENVDEF', `-DSM_HEAP_CHECK=1')

See SM_HEAP_CHECK for a full description of this compile-time macro.

SM_IO_MIN_BUF, SM_IO_MAX_BUF, and SM_IO_MAX_BUF_FILE

The stat(3) C-language library routine returns a structure containing the variable st_blksize. That variable contains as its value the optimum block size to use for disk I/O.

When porting, if that variable fails to contain a useful value, you can define three compile-time macros as a substitute. The SM_IO_MIN_BUF macro defines the minimum disk I/O size:

APPENDDEF(`confENVDEF', `-DSM_IO_MIN_BUF=512')

The SM_IO_MAX_BUF macro defines the maximum disk I/O size:

APPENDDEF(`confENVDEF', `-DSM_IO_MAX_BUF=4096')

The SM_IO_MAX_BUF macro defines the maximum file I/O size:

APPENDDEF(`confENVDEF', `-DSM_IO_MAX_BUF_FILE=2048')

To see if any of these compile-time macros are defined with your sendmail binary, use the -d0.12 debugging command-line switch.