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From: Ian Lance Taylor <iant@google.com>
To: "H.J. Lu" <hjl.tools@gmail.com>
Cc: Joe Buck <Joe.Buck@synopsys.com>, GCC Development <gcc@gcc.gnu.org>
Subject: Re: Bootstrap with -Wmissing-prototypes doesn't work for C++
References: <CAMe9rOqKLAhNGY0oHqEU8HKuP-N1SLKHOe=pykJS8ZR3JcF9aw@mail.gmail.com>	<59662D5BB74CD84D9FA8E6491ADB51A7DEAE4D4D@US01WXMBX1.internal.synopsys.com>	<CAMe9rOqjJruPnirG6f2oJKyUqR+EDy44sG8gq571h21tNw7Lyg@mail.gmail.com>
Date: Fri, 19 Aug 2011 21:45:00 -0000
In-Reply-To: <CAMe9rOqjJruPnirG6f2oJKyUqR+EDy44sG8gq571h21tNw7Lyg@mail.gmail.com>	(H. J. Lu's message of "Fri, 19 Aug 2011 12:34:20 -0700")
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"H.J. Lu" <hjl.tools@gmail.com> writes:

> [hjl@gnu-33 gcc]$ cat x.c
> int
> foo (int x)
> {
>   return x;
> }
> [hjl@gnu-33 gcc]$ ./xgcc -B./ -S -O -Wmissing-prototypes x.c
> x.c:2:1: warning: no previous prototype for =E2=80=98foo=E2=80=99 [-Wmiss=
ing-prototypes]
> [hjl@gnu-33 gcc]$ ./g++ -B./ -S -O -Wmissing-prototypes x.c
> cc1plus: warning: command line option =E2=80=98-Wmissing-prototypes=E2=80=
=99 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.  We ought to implement
-Wmissing-prototypes for C++.

Ian