Errors using --with-ldap configuring 4.4.8 under Solaris 10

Hi, I have done a build of PHP 4.4.8 under Solaris 10, but I need to 
enable LDAP support.  Here is the complete configure command (this is 
for Horde, so it needs a lot of modules):

./configure  --prefix=/usr/local/php4.4.8 
--with-config-file-path=/usr/local/hp4.4.8 
--with-apxs2=/usr/local/apache-test/bin/apxs --with-gettext 
--with-mcrypt --with-iconv=/usr/local --enable-mbstring=all 
--enable-mbregex --with-gd --with-png-dir=/usr/local 
--with-jpeg-dir=/usr/local --with-mysql=/usr/local/mysql 
--with-imap=/usr/local/imap2007b/ --with-openssl=/usr/local/ssl 
--with-libxml-dir=/usr/local --with-zlib=/usr/local --with-dom --with-ldap

If I build it without --with-ldap it configures, compiles, and runs 
fine.  When I add --with-ldap to the configure command, it dies at this point:

checking for LDAP support... yes
configure: error: Cannot find ldap libraries in /usr/lib.

But there are LDAP libraries in /usr/lib:

-bash-3.00$ ls -la /usr/lib | grep ldap
drwxr-xr-x   2 root     bin          512 Jan  9 15:31 ldap
lrwxrwxrwx   1 root     root          12 Jan  9 13:26 libldap.so -> 
libldap.so.5
-rwxr-xr-x   1 root     bin       214784 Aug 16  2007 libldap.so.4
-rwxr-xr-x   1 root     bin       367764 Aug 16  2007 libldap.so.5
lrwxrwxrwx   1 root     root          13 Jan  9 13:26 libsldap.so -> 
libsldap.so.1
-rwxr-xr-x   1 root     bin       266816 Aug 16  2007 libsldap.so.1
-rw-r--r--   1 root     bin        18479 Jan 21  2005 llib-lldap
-rw-r--r--   1 root     bin        78705 Aug  8  2007 llib-lldap.ln
-rw-r--r--   1 root     bin         4370 Aug  8  2007 llib-lsldap
-rw-r--r--   1 root     bin        87732 Aug  8  2007 llib-lsldap.ln
-rwxr-xr-x   1 root     bin       118300 Aug 16  2007 nss_ldap.so.1

What gets me is, if I look for the error message in the configure 
script, here is what seems to be generating it:

     if test -f $LDAP_LIBDIR/libclntsh.$SHLIB_SUFFIX_NAME.10.1; then
       cat >> confdefs.h <<\EOF
#define HAVE_ORALDAP_10 1
EOF

     fi
   else
     { echo "configure: error: Cannot find ldap libraries in 
$LDAP_LIBDIR." 1>&2;
  exit 1; }
   fi

It looks to me like the configure script is looking for a library 
called libclntsh which I believe is an Oracle LDAP library.  Does 
anyone know a way to work around this?  Thanks...

Jim McCullars
University of Alabama in Huntsville