Not all versions of C
libraries declare values returned by functions in exactly the same
way in all cases. For sendmail to work properly
it needs to know how certain subroutines are declared on certain
systems. A few compile-time macros convey this information to
sendmail, and they are listed and described in
Table 3-14.
Table 3-14. Compile-time macros that define return types
|
ARBPTR_T
|
The type of an arbitrary pointer. Usually this is the
"void *" type, but for some older
compilers it can be the "char *"
type.
|
|
GIDSET_T
|
The type of the second argument passed to
getgroups(2). Usually this is an
"int" type, but for some systems it
is a "gid_t" type.
|
|
SLEEP_T
|
The type returned by sleep(2). Usually this is
an "unsigned int" type.
|
|
SOCKADDR_LEN_T
|
The type of the third argument to accept(2),
getsockname(2), and
getpeername(2). Usually this is an
"int" type.
|
|
SOCKOPT_LEN_T
|
The type of the fifth argument to getsockopt(2)
and setsockopt(2). Usually this is an
"int" type.
|
None of these compile-time macros will need to be defined by you
unless you get warnings about mismatched types when compiling.
New ports should be reported to
sendmail@sendmail.org so that they can be folded
into future releases.
