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LD_LIBRARY_PATH

We need to give the dynamic linker information on how to find our shared library at run-time

One solution: LD_LIBRARY_PATH.

• Set this environment variable to a list of colon-separated directories.
  
  
• Dynamic linker searches these directories before looking in standard library directories.

$ LD_LIBRARY_PATH=. ./prog
Called mod1-x1
Called mod2-x2

Note: production applications should not use LD_LIBRARY_PATH.

• Users should not have to know where the library is located.
  
  
• LD_LIBRARY_PATH is ignored for set-user-ID and set-group-ID programs.

(C) 2006, Michael Kerrisk