How to install Postgres that supports 64-bit integer/date-time.

How to install Postgres 8.0.1 that supports 64-bit integer/date-time.

# ./configure --prefix=/usr/local/pgsql --with-tclconfig=/usr/local/lib --with-tcl

checking build system type... sparc-sun-solaris2.8

checking host system type... sparc-sun-solaris2.8

checking which template to use... solaris

checking whether to build with 64-bit integer date/time support... no

checking whether NLS is wanted... no

checking for default port number... 5432

checking for gcc... gcc

while installation I am getting this message:” checking whether to build with 64-bit integer date/time support... no”

Thanks