[Samba] passdb backend postgresql

[Maulana I Kahirawan]

Hi there..
I tried to compile samba with postgresql as a backend
and I always got some error.
this is my config
Redhat Linux 9
PostgreSQL 7.3.6
Samba 3.0.13

here is my configure file
$ ./configure --prefix = /usr \
                    --localstatedir=/var \
                    --with-configdir=/etc/samba \
                    --with-privatedir=/etc/samba \
                    --with-fhs \
                    --with-quotas \
                    --with-smbmount \
                    --enable-cups \
                    --with-pam \
                    --with-pam_smbpass \
                    --with-syslog \
                    --with-utmp \
                    --with-sambabook=/usr/share/swat/using_samba \
                    --with-swatdir=/usr/share/swat \
                    --with-shared-modules=idmap_rid \
                    --with-libsmbclient \
                    --with-expsam=pgsql \
                    --with-pgsql-prefix= /usr/local/pgsql
and I get error
"..............................
checking for PGSQL... yes
checking whether to use automount... no
checking whether to use smbmount... configure: error: not on a linux 
system!"

and when I remove the "--with-smbmount"
I also get error like this
"............................
checking whether to use PAM... yes
checking for pam_get_data in -lpam... yes
checking whether to use pam_smbpass... ye
configure: error: No support for PIC code"

does anyone know how to build samba with postgresql as a backend?