samba - Jun 1999 - 2.0.4b: configure --with-smbmount -> ERROR

RH6.0.

I downloaded:
samba-2.0.4b-19990527.src.rpm

Follwing the instrucions in README.smbmount, I edited samba2.spec to add
1) --with-smbmount to configure
2) the smbmount related files and man pages to the install and files sections.

rpm -ba samba2.spec stops with:

.....
Compiling smbd/ssl.c with -fpic
Linking shared library bin/smbwrapper.so
Compiling client/smbmount.c
client/smbmount.c: In function `close_our_files':
client/smbmount.c:242: `NR_OPEN' undeclared (first use in this function)
client/smbmount.c:242: (Each undeclared identifier is reported only once
client/smbmount.c:242: for each function it appears in.)
make: *** [client/smbmount.o] Error 1
Bad exit status from /var/tmp/rpm-tmp.83820 (%build)

Please, can you tell me what I'm doing wrong?

Thanks.

-- 
Giulio
giuliox@tin.it