popt: popt: Popt is a C library for parsing command line parameters. Popt was popt: heavily influenced by the getopt() and getopt_long() functions, but it popt: improves on them by allowing more powerful argument expansion. Popt popt: can parse arbitrary argv[] style arrays and automatically set popt: variables based on command line arguments. Popt allows command line popt: arguments to be aliased via configuration files and includes utility popt: functions for parsing arbitrary strings into argv[] arrays using popt: shell-like rules. popt: