[Exim] compiling with Mac OS X, error

Hi, i followed this document:
http://www.afp548.com/Articles/Jaguar/exim410.html
But i still have some errors compiling, any leads?

##
cc -c -O -no-cpp-precomp -DBIND_8_COMPAT -I.    acl.c
cc -c -O -no-cpp-precomp -DBIND_8_COMPAT -I.    child.c
cc -c -O -no-cpp-precomp -DBIND_8_COMPAT -I.    crypt16.c
cc -c -O -no-cpp-precomp -DBIND_8_COMPAT -I.    daemon.c
daemon.c: In function `handle_smtp_call':
daemon.c:144: `socklen_t' undeclared (first use in this function)
daemon.c:144: (Each undeclared identifier is reported only once
daemon.c:144: for each function it appears in.)
daemon.c:144: parse error before `ifsize'
daemon.c:320: `ifsize' undeclared (first use in this function)
daemon.c: In function `daemon_go':
daemon.c:1392: `socklen_t' undeclared (first use in this function)
daemon.c:1392: parse error before `len'
daemon.c:1529: `len' undeclared (first use in this function)
make[1]: *** [daemon.o] Error 1
make: *** [go] Error 2
##

thanks
-- -
Louie Miranda
http://www.axishift.com