-rpath dir
Add a directory to the runtime library search path.
This is used when linking an ELF executable with
shared objects. All -rpath arguments are concatenated
and passed to the runtime linker, which uses them to
locate shared objects at runtime.
^^^^^^^^^^^^^^^^^^^^^^^^^
That is if we use -rpath /foo/bar then /foo/bar do not have to be in either
/etc/ld.so.conf nor in LD_LIBRARY_PATH.
/ Fredrik