[Bug driver/55651] gcc hangs when "-Wp," is passed on the command line

[joseph at codesourcery dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55651

--- Comment #3 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
On Mon, 4 Nov 2013, mingjie.xing at gmail dot com wrote:

> 2013-11-04  Mingjie Xing  <mingjie.xing@gmail.com>
> 
>         * common.opt (Wa, Wl, Wp,): Change JoinedOrMissing to Joined.

That sounds wrong.  Empty arguments are valid here and should be passed 
down as such.  See the thread starting at 
<http://gcc.gnu.org/ml/gcc-patches/2010-04/msg00848.html> where a change 
to the handling of empty arguments was rejected.