def options(opt):
    ''' This is a bit strange, but disable is the flag, not enable. '''
    opt.add_option('--disable-fault-handling', action='store_true', dest='disable_fault_handling', help=('disable the fault handlers'), default=False)

    # We do not want libunwind by default (backtrace_symbols() in
    # glibc is better) but allow (eg) IA-64 to build with it where it
    # might be better (per old comment in fault.c)
    opt.samba_add_onoff_option('libunwind',
                               default=None,
                               help='''Use libunwind instead of the default backtrace_symbols()
                               from libc, for example on IA-64 where it might give a better
                               backtrace.''')

    opt.add_option('--with-systemd',
                   help=("Enable systemd integration"),
                   action='store_true', dest='enable_systemd')

    opt.add_option('--without-systemd',
                   help=("Disable systemd integration"),
                   action='store_false', dest='enable_systemd')

    opt.add_option('--with-lttng',
                   help=("Enable lttng integration"),
                   action='store_true', dest='enable_lttng')

    opt.add_option('--without-lttng',
                   help=("Disable lttng integration"),
                   action='store_false', dest='enable_lttng')

    opt.add_option('--with-gpfs',
                   help=("Directory under which gpfs headers are installed"),
                   action="store", dest='gpfs_headers_dir')