Error building PHP with PostgreSQL support

I am getting the following problem with trying to install from source
PHP 4.3.6 with PG support on FreeBSD 5.2.1. I have PostgreSQL 7.4.2
recently upgraded from 7.3.x and it is up and running fine. I also have
Heimdal 0.6 installed and PostgreSQL was built with that support. Is the
error below from something missing on the Heimdal side of things or
PostgreSQL? And what does anyone suggest to resolve the issue? Maybe I
need to rebuild Heimdal since upgrading PostgreSQL with krb5 support?

/usr/local/lib/libc-client4.so: warning: tmpnam() possibly used
unsafely; consider using mkstemp()
/usr/local/lib/libpq.so: undefined reference to `krb5_cc_get_principal'
/usr/local/lib/libpq.so: undefined reference to
`krb5_sname_to_principal'
/usr/local/lib/libpq.so: undefined reference to `krb5_cc_default'
/usr/local/lib/libpq.so: undefined reference to `krb5_cc_close'
/usr/local/lib/libpq.so: undefined reference to `error_message'
/usr/local/lib/libpq.so: undefined reference to `krb5_free_error'
/usr/local/lib/libpq.so: undefined reference to `krb5_sendauth'
/usr/local/lib/libpq.so: undefined reference to `krb5_free_principal'
/usr/local/lib/libpq.so: undefined reference to `krb5_unparse_name'
/usr/local/lib/libpq.so: undefined reference to `krb5_free_context'
/usr/local/lib/libpq.so: undefined reference to `krb5_init_context'
*** Error code 1

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Robert