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

[Diapolo]

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!?

[laanwj]

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.

[gavinandresen]

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

[laanwj]

Duplicate of #1044