Bitcoin-Qt: problem in ParseParameters() when supplying Qt style #2458

I tried to supply -style fusion (Qt5 style) as first command-line parameter to bitcoin-qt.exe, which leads to the client is not further parsing command-line parameters.

It seems this is causing the problem: https://github.com/bitcoin/bitcoin/blob/master/src/util.cpp#L544

Workaround is to just supply the -style fusion at the end, but IMHO silently ignoring stuff the parser doesn't like is not the right thing to do!?

Isn't there already an issue about this (by me)? Not specifically about qt5 but silently ignoring unknown command line options.

A possible solution would be to use a command line option parsing library with proper error reporting instead of the hand-rolled stuff we have now. Does boost have one?

That will be quite a difficult transition though especially as we want to keep backward compatibility.

That would be http://www.boost.org/doc/libs/1_53_0/doc/html/program_options.html

Duplicate of #1044