The linker uses the following search paths to locate required
shared libraries.

1. Any directories specified by -rpath-link options.

2. Any directories specified by -rpath options. The difference
between -rpath and -rpath-link is that directories specified by
-rpath options are included in the executable and used at run-
time, whereas the -rpath-link option is only effective at link
time. It is for the native linker only.

3. On an ELF system, if the -rpath and "rpath-link" options were
not used, search the contents of the environment variable
"LD_RUN_PATH". It is for the native linker only.

4. On SunOS, if the -rpath option was not used, search any direc-
tories specified using -L options.

5. For a native linker, the contents of the environment variable
"LD_LIBRARY_PATH".

6. For a native ELF linker, the directories in "DT_RUNPATH" or
"DT_RPATH" of a shared library are searched for shared
libraries needed by it. The "DT_RPATH" entries are ignored if
"DT_RUNPATH" entries exist.

7. The default directories, normally /lib and /usr/lib.

8. For a native linker on an ELF system, if the file
/etc/ld.so.conf exists, the list of directories found in that
file.