PHP Warning: Invalid library (maybe not a PHP library) 'rrdtool.so'

[Konrad Riedel <k.riedel@gmx.de>]

Hi,

I've compiled & installed the rrdtool.so library (rrdtool_1.0.33 from
testing), but php4 (4.0.5-2) refused to accept that as a library.

Any hints?

Mit freundlichen Grüßen
Konrad Riedel