RPM 8.0.3 for RH7.3, RH7.2 and AS2.1

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Hi all,
I'm trying to create the rpm for these distributions,
I'm using the one available for RH9.0 but I got:

On RH7.3, RH7.2 and AS2.1 I get:

# rpmbuild --rebuild postgresql-8.0.3-1PGDG.src.rpm
[...]
checking for perl... /usr/bin/perl
checking for Perl archlibexp... /usr/lib/perl5/5.6.1/i386-linux
checking for Perl privlibexp... /usr/lib/perl5/5.6.1
checking for Perl useshrplib... false
checking for flags to link embedded Perl... -L/usr/local/lib /usr/lib/perl5/5.6.1/i386-linux/auto/DynaLoader/DynaLoader.a -L/usr/lib/perl5/5.6.1/i386-linux/CORE -lperl -lnsl -ldl -lm -lc -lcrypt -lutil
checking for python... /usr/bin/python
checking for Python distutils module... yes
checking Python configuration directory... File "<string>", line 1
from distutils.sysconfig import get_python_lib as f; import os; print os.path.join(f(plat_specific=1,standard_lib=1),'config')
^
SyntaxError: invalid syntax

checking how to link an embedded Python application... -L -lpython1.5 -lieee -ldl -lpthread -lm
checking for main in -lbsd... yes
checking for setproctitle in -lutil... no
checking for main in -lm... yes
checking for main in -ldl... yes
checking for main in -lnsl... yes
checking for main in -lsocket... no
checking for main in -lipc... no
checking for main in -lIPC... no
checking for main in -llc... no
checking for main in -ldld... no
checking for main in -lld... no
checking for main in -lcompat... no
checking for main in -lBSD... no
checking for main in -lgen... no
checking for main in -lPW... no
checking for main in -lresolv... yes
checking for library containing getopt_long... none required
checking for main in -lunix... no
checking for library containing crypt... -lcrypt
checking for library containing fdatasync... none required
checking for shmget in -lcygipc... no
checking for readline... yes (-lreadline -ltermcap)
checking for inflate in -lz... yes
checking for library containing com_err... -lcom_err
checking for library containing krb5_encrypt... no
configure: error: could not find function 'krb5_encrypt' required for Kerberos 5
error: Bad exit status from /var/tmp/rpm-tmp.4601 (%build)

RPM build errors:
Bad exit status from /var/tmp/rpm-tmp.4601 (%build)

does anyone knows how to fix these errors or where I can find the RPM for these 3 platforms?

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