If this environment variable is set, the
shared library loader displays debugging information about the libraries
as they're opened.
The value can be a comma-separated list of the following:
- all — display all debug messages.
- help — display a help message, and then exit.
- reloc — display relocation processing messages.
- libs — display information about shared objects
being opened.
- statistics — display runtime linker statistics.
- lazyload — print lazy-load debug messages.
- debug — print various runtime linker debug messages.
A value of 1 (one) is the same as all.