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These macros check for particular C types in `sys/types.h', `stdlib.h' and others, if they exist.
GETGROUPS_T to be whichever of gid_t or int
is the base type of the array argument to getgroups.
HAVE_MBSTATE_T if <wchar.h> declares the
mbstate_t type. Also, define mbstate_t to be a type if
<wchar.h> does not declare it.
signal as returning a pointer to a
function returning void, define RETSIGTYPE to be
void; otherwise, define it to be int.
Define signal handlers as returning type RETSIGTYPE:
RETSIGTYPE
hup_handler ()
{
...
}
|
uid_t is not defined, define uid_t to be int and
gid_t to be int.