In php-4.0.3pl1/INSTALL you wrote:

> USING PHP 3 AND PHP 4 AS CONCURRENT APACHE MODULES
> 
> This feature is known to work on the following platforms:
> 
>    - Linux with recent binutils (binutils 2.9.1.0.25 tested)
>    - Solaris 2.5 or better
>    - FreeBSD (3.2, 4.0 tested)
> 
> If this also works on your platform or if you know a way to do it, please report it to our bug database at http://bugs.php.net

I herewith confirm, that --enable-versioning works on:

franklin.island:/prog/src/php-4.0.3pl1 55>uname -a
IRIX64 island 6.5 01200532 IP27
franklin.island:/prog/src/php-4.0.3pl1 56>

Using gcc-2.95.2 and running:

franklin.island:/prog/src/php-4.0.3pl1 56>telnet www-stud 80
Trying 129.132.18.4...
Connected to www-stud.ethz.ch.
Escape character is '^]'.
HEAD / HTTP/1.0
Host: www.arch.ethz.ch

HTTP/1.1 200 OK
Date: Fri, 08 Dec 2000 15:26:58 GMT
Server: Apache/1.3.14 (Unix) PHP/4.0.3pl1 PHP/3.0.17
Last-Modified: Mon, 13 Sep 1999 11:38:36 GMT
ETag: "8437a27-a8a-37dce23c"
Accept-Ranges: bytes
Content-Length: 2698
Connection: close
Content-Type: text/html

Connection closed by foreign host.
franklin.island:/prog/src/php-4.0.3pl1 57>