[PLUG] Apache throws fileinfo.so error...

[someone]

PHP Warning:  mime_magic: type regex\t\tBEGIN[[:space:]]*
[{]\tapplication/x-awk invalid in Unknown on line 0
PHP Warning:  Unknown(): Unable to load dynamic library
'/usr/lib/php4/fileinfo.so' - /usr/lib/php4/fileinfo.so: cannot open
shared object file: No such file or directory in Unknown on line 0

I am assuming that what appears to be source code for fileinfo is 
not compiled and installed, but I can't figure out how to compile 
and install it.

config.m4  CREDITS  EXPERIMENTAL  fileinfo.c  fileinfo.php
php_fileinfo.h

The above is the file list of Fileinfo-1.0.3.tar.gz
uncompressed.  I recognize what is probably a C source
and header file, but what is the m4 macro file and php 
file for?  Why isn't there a Makefile let alone an 
instruction file for installing this?

Hmm, I'm having a hard time figuring out where I got this
from searching around on horde...