Comment 39 for bug 678808

According to a comment on the wxWidgets forum, the Unicode handling of arguments for Linux in Unicode was fixed in wxWidgets version 3.1 and (https://forums.wxwidgets.org/viewtopic.php?t=43236). This I can't confirm at the moment, but that'd indicate enforcing 3.1 or higher for wxWidgets would ostensibly mark this as resolved implicitly.

That version was enforced / released as of Feb 29th, 2016 (https://www.wxwidgets.org/news/2016/02/wxwidgets-3.1.0-released/) so that should be viable as an option I'd think?