Libraries in /usr/local/lib not found - SO

Pick one or the other

• add the path to the LD_LIBRARY_PATH

export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:/usr/local/lib"

• update the configuration file of the runtime linker

# add to /etc/ld.so.conf.d/usr_local_lib.conf
/usr/local/lib

# and then run
ldconfig