/usr/local/lib

In some Linux distros, namely Red Hat, the /usr/local/lib directory is not included in the built-in library search path. Using a shared object file in this directory may cause an error. To solve this problem, either move the library in question to one of the built-in library search directory (/usr/lib or /lib) or add /usr/local/lib to the LD_LIBRARY_PATH environment variable.