-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Given the following testcase: #include <iostream> #include <boost/program_options.hpp> namespace opt = boost::program_options; int main(int argc, char *argv[]) { try { bool all, all_chroots, all_sessions; opt::options_description chroot("Chroot selection"); chroot.add_options() ("all,a", "Select all chroots and active sessions") ("all-chroots", "Select all chroots") ("all-sessions", "Select all active sessions"); opt::variables_map vm; opt::store(opt::parse_command_line(argc, argv, chroot), vm); opt::notify(vm); if (vm.count("all")) all = true; if (vm.count("all-chroots")) all_chroots = true; if (vm.count("all-sessions")) all_sessions = true; return 0; } catch (std::exception const& e) { std::cerr << e.what() << std::endl; return 1; } } $ g++ -o opt opt.cc -lboost_program_options $ ./opt --help unknown option help $ ./opt --all-chroots $ ./opt --all-sessions $ ./opt --all ambiguous option all - --all is not abiguous, since it's an exact match. It's not abigous for GNU getopt or GLib GOption, so this is IMHO a bug. Regards, Roger Versions of packages libboost-program-options-dev depends on: ii libboost-dev 1.33.0-6 Boost C++ Libraries development fi ii libboost-program-options1.33. 1.33.0-6 program options library for C++ - -- Roger Leigh Printing on GNU/Linux? http://gimp-print.sourceforge.net/ Debian GNU/Linux http://www.debian.org/ GPG Public Key: 0x25BFB848. Please sign and encrypt your mail. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (GNU/Linux) Comment: Processed by Mailcrypt 3.5.8+ <http://mailcrypt.sourceforge.net/> iD8DBQFDubyOVcFcaSW/uEgRAv/1AJ0bMx0Me4owHITYjdQqjJz+N+yNOACggbU7 rTykg0EABvU1XIiX+LZ5KjY= =QqE/ -----END PGP SIGNATURE-----