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Date: Fri, 19 Aug 2011 22:43:00 -0000
Message-ID: <CAAiZkiDOq7KJpDagv74SL8MvQXHsDz1QBjPDK-mHmfPdDgma7g@mail.gmail.com>
Subject: Re: Bootstrap with -Wmissing-prototypes doesn't work for C++
From: Gabriel Dos Reis <gdr@integrable-solutions.net>
To: Ian Lance Taylor <iant@google.com>
Cc: "H.J. Lu" <hjl.tools@gmail.com>, Joe Buck <Joe.Buck@synopsys.com>, 	GCC Development <gcc@gcc.gnu.org>
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On Fri, Aug 19, 2011 at 4:45 PM, Ian Lance Taylor <iant@google.com> wrote:
> "H.J. Lu" <hjl.tools@gmail.com> writes:
>
>> [hjl@gnu-33 gcc]$ cat x.c
>> int
>> foo (int x)
>> {
>> =A0 return x;
>> }
>> [hjl@gnu-33 gcc]$ ./xgcc -B./ -S -O -Wmissing-prototypes x.c
>> x.c:2:1: warning: no previous prototype for =91foo=92 [-Wmissing-prototy=
pes]
>> [hjl@gnu-33 gcc]$ ./g++ -B./ -S -O -Wmissing-prototypes x.c
>> cc1plus: warning: command line option =91-Wmissing-prototypes=92 is valid
>> for Ada/AdaWhy/C/ObjC but not for C++ [enabled by default]
>> [hjl@gnu-33 gcc]$ ./g++ -B./ -S -O x.c
>> [hjl@gnu-33 gcc]$
>>
>> Is this a bug?
>
> This is a minor missing feature, yes. =A0We ought to implement
> -Wmissing-prototypes for C++.
>

what would it do?  There is no notion of `prototype' in C++ (as C
programmers understand it).
So, what would it mean to warn about something we can't take the
negation of? ;-)

-- Gaby