Shared libraries. How are they found?

[Wikström, Mårten]

How do you tell ld where the shared libraries can be found? Under linux you can 
use ldconfig, but it says it is obsolete under Hurd. I had to set 
LD_LIBRARY_PATH, but I doubt this is the _right_ way to do it.

BTW, how does ld.so relate to the exec server? Who is responsible of what?

thanks,

MÃ¥rten