From: mec.gnu@mindspring.com (Michael Elizabeth Chastain)
To: gcc@gcc.gnu.org
Subject: (printf) ("hello world\n");
Date: Tue, 09 Dec 2003 20:41:00 -0000 [thread overview]
Message-ID: <20031209204037.906D84B412@berman.michael-chastain.com> (raw)
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.
gcc 2.95.3 and gcc 3.3.2 both say:
hello.c: In function `main':
hello.c:3: `printf' undeclared (first use in this function)
hello.c:3: (Each undeclared identifier is reported only once
hello.c:3: for each function it appears in.)
This happens with each of:
-std=iso9899:1990
-std=iso9899:199409
-std=iso9899:1999
But the HP ansi-c and aCC compilers accept it just fine.
This kind of code comes out of a macro expansion with readline 4.3
and gcc 3.3.2 on native hppa2.0w-hp-hpux11.11. It's the end
result of an interaction between multibyte support in hpux11
and a strange-looking workaround in readline.
Of course the question "is this conforming ..." depends on a particular
standard. So I think I am asking three questions, one for each of the
three standards.
If the program is not conforming, then I can work on a patch for
readline. But if the program is conforming, then I can file a PR
against gcc (and I'll still have to patch readline).
(Personally I would be happier if this program is not conforming.)
Michael C
next reply other threads:[~2003-12-09 20:40 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-12-09 20:41 Michael Elizabeth Chastain [this message]
2003-12-09 21:01 ` Dale Johannesen
2003-12-09 23:56 ` Geoff Keating
2003-12-10 9:53 ` Eyal Lebedinsky
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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