ldconfig

Mmm I just compiled libpng our something like that and in Linux systems that i usually use I must do ldconfig as root but in MacOS X I can't find it our anything like ldconfig to update my libs =((
Help-me please [img]images/icons/frown.gif"%20border="0[/img]

I need this too!!! I've searched everything and everywhere and everyone sounds like it shoud already be installed but I can't find it. Same with ld.so.conf not being there...anyone have any ideas on how to fix this?