Fix this in rcfiles.

-bash: declare: -g: invalid option
declare: usage: declare [-aAfFilrtux] [-p] [name[=value] ...]
nicolaw@hostname:~ $ bash --version
GNU bash, version 4.1.5(1)-release (x86_64-pc-linux-gnu)
Copyright (C) 2009 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>

This is free software; you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.