AWKLIBPATH environment variable is similar to the
variable, but it is used to search for loadable extensions (stored as
system shared libraries) specified with the -l option rather
than for source files. If the extension is not found, the path is
searched again after adding the appropriate shared library suffix for
the platform. For example, on GNU/Linux systems, the suffix ‘.so’
is used. The search path specified is also used for extensions loaded
@load keyword (see Loading Shared Libraries).
AWKLIBPATH does not exist in the environment, or if it has
an empty value,
gawk uses a default path; this
is typically ‘/usr/local/lib/gawk’, although it can vary depending
gawk was built.
gawk places the value of the search path that it used into
ENVIRON["AWKLIBPATH"]. This provides access to the actual search
path value from within an