Upgrading from 4.4.3 to 4.4.5

["Ernie Dunbar" <maillist@xxxxxxxxxxxxx>]

I'm currently using PHP 4.4.3 on a Cobalt RaQ running Linux 2.2.16C37_V
and Apache 1.3.33 (yes, patches have been installed to secure this old
version). We're running SquirrelMail 1.4.9a, and as a result we need to
configure PHP 4.4.5 --with-interbase and --with-imap=[path]/imap-2002e.

These are my 'configure' options:

./configure '--prefix=/usr' '--with-apxs=/usr/sbin/apxs'
'--enable-safe-mode' '--with-config-file-path=/etc/httpd'
'--with-exec-dir=/usr/bin' '--with-zlib' '--enable-magic-quotes'
'--with-regex=system' '--enable-track-vars' '--with-iconv' '--enable-xml'
'--disable-debug' '--with-gd=/usr' '--with-mysql' '--with-interbase'
'--enable-mbstring' '--enable-mbstr-enc-trans' '--with-pgsql=shared'
'--with-ldap' '--with-imap=../imap-2002e' '--with-openssl=/usr'
'--with-jpeg-dir=/usr' '--with-png-dir=/usr'

The 'configure' works, but the 'make' fails with the following error:

/bin/sh /home/src/php-4.4.5/libtool --silent --preserve-dup-deps
--mode=compile gcc  -Iext/interbase/ -I/home/src/php-4.4.5/ext/interbase/
-DPHP_ATOM_INC -I/home/src/php-4.4.5/include -I/home/src/php-4.4.5/main
-I/home/src/php-4.4.5 -I/home/src/imap-2002e/include
-I/usr/interbase/include -I/home/src/php-4.4.5/ext/mbstring/mbregex
-I/home/src/php-4.4.5/ext/mbstring/libmbfl
-I/home/src/php-4.4.5/ext/mbstring/libmbfl/mbfl -I/usr/include/pgsql
-I/home/src/php-4.4.5/ext/xml/expat -I/home/src/php-4.4.5/TSRM
-I/home/src/php-4.4.5/Zend    -g -O2  -prefer-non-pic -c
/home/src/php-4.4.5/ext/interbase/interbase.c -o
ext/interbase/interbase.lo
/home/src/php-4.4.5/ext/interbase/interbase.c: In function `_php_ibase_user':
/home/src/php-4.4.5/ext/interbase/interbase.c:3051: `buf' undeclared
(first use in this function)
/home/src/php-4.4.5/ext/interbase/interbase.c:3051: (Each undeclared
identifier is reported only once
/home/src/php-4.4.5/ext/interbase/interbase.c:3051: for each function it
appears in.)
make: *** [ext/interbase/interbase.lo] Error 1

I'm using the exact same 'configure' as I did with PHP 4.4.3, and it
compiled perfectly. Do I need to upgrade some other dependency to make
4.4.5 work?