From: Eyal Lebedinsky <eyal@eyal.emu.id.au>
To: gcc@gcc.gnu.org
Cc: Michael Elizabeth Chastain <mec.gnu@mindspring.com>
Subject: Re: (printf) ("hello world\n");
Date: Wed, 10 Dec 2003 09:53:00 -0000 [thread overview]
Message-ID: <3FD6DD9B.E35C742@eyal.emu.id.au> (raw)
In-Reply-To: <jmvfopy2un.fsf@desire.geoffk.org>
Geoff Keating wrote:
>
> mec.gnu@mindspring.com (Michael Elizabeth Chastain) writes:
>
> > I have a language lawyer question.
> >
> > int main ()
> > {
> > (printf) ("hello world\n");
> > return 0;
> > }
> >
> > Is this a conforming C program?
> >
> > There is no "#include <stdio.h>" so there is no declaration
> > in scope for printf.
>
> This would be nonconforming even if it was
>
> int main()
> {
> printf ("hello world\n");
> }
>
> since printf is a varargs function and so must be prototyped before it
> is called (ISO C 6.5.2.2 paragraph 6).
But without <stdio.h> the varargs attribute is not present and all is
well. Naturally, it may very well fail to execute correctly, but this
is not the issue here.
--
Eyal Lebedinsky (eyal@eyal.emu.id.au) <http://samba.org/eyal/>
next prev parent reply other threads:[~2003-12-10 8:47 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-12-09 20:41 Michael Elizabeth Chastain
2003-12-09 21:01 ` Dale Johannesen
2003-12-09 23:56 ` Geoff Keating
2003-12-10 9:53 ` Eyal Lebedinsky [this message]
2003-12-10 10:18 ` Andreas Schwab
2003-12-10 12:45 ` Robert Dewar
2003-12-10 13:12 ` Segher Boessenkool
2003-12-10 13:34 ` Robert Dewar
2003-12-10 13:36 ` Gabriel Dos Reis
2003-12-10 14:08 ` Joseph S. Myers
2003-12-10 14:17 ` Segher Boessenkool
2003-12-10 15:55 ` Andreas Schwab
2003-12-11 17:09 ` Geoff Keating
2003-12-11 17:39 ` Segher Boessenkool
2003-12-12 13:07 ` Jan-Benedict Glaw
2003-12-12 17:17 ` Gabriel Dos Reis
2003-12-10 14:19 ` Register Spilling Umar Janjua
2003-12-11 7:59 ` Jim Wilson
2003-12-11 9:01 ` Sanjiv Gupta
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