error make all

Hi

I have error during install postgresql6.5.2 in Caldera
open linux2.4, using CDROM from Posgresql's book (
japanese version ).
The error occured in the step "make all".
The error messages are as follow :

In file included from hba.c:28:
../../backend/port/inet_aton.h:3: conflicting types
for inet_aton
/usr/include/arpa/inet.h:67 : previous declaration of
inet_aton
make[2] : *** [hba.o] Error1
make[2] : Leaving directory
'/usr/local/src/postgresql-6.5.2/src/backend/libpq
make[1] : *** [libpd.dir] Error 2
make[1] : Leaving directory
/usr/local/src/postgresql-6.5.2/src/backend
make : *** [all] Error 2

Help me please.
Thank you.

-pamungkas-


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