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and subject line Bug#141015: c/8609: Superfluous warning when -std=c99/gnu99
and noreturn on main()
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From: Agthorr <[EMAIL PROTECTED]>
To: Debian Bug Tracking System <[EMAIL PROTECTED]>
Subject: gcc-3.0: Superfluous warning when -std=c99/gnu99 and noreturn on main()
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Date: Tue, 02 Apr 2002 22:34:00 -0800
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Package: gcc-3.0
Version: 1:3.0.4-6
Severity: normal
The following program generates a superfluous warning when compiled
with -std=c99 or -std=gnu99.
------------------------------------------------------------------------
#include <stdlib.h>
int main (void) __attribute__ ((noreturn));
int main (void)
{
exit(1);
}
------------------------------------------------------------------------
volition:~/tmp$ gcc-3.0 -std=c99 -c test.c
test.c: In function `main':
test.c:6: warning: function declared `noreturn' has a `return' statement
volition:~/tmp$
------------------------------------------------------------------------
Obviously, this warning is bogus since there is no return statement
anywhere in the program :> The warning is not produced by gcc 2.95.4
nor in the default -std=gnu89 mode.
Although this example is trivial, I encountered the bug in an actual
program that depends on -std=gnu99 (since C99 features are used). In
the program, main() starts an event loop which never directly returns;
the program exits by calling exit().
-- System Information
Debian Release: 3.0
Architecture: i386
Kernel: Linux volition 2.4.18volition #1 Thu Mar 28 20:13:24 PST 2002 i686
Locale: LANG=C, LC_CTYPE=
Versions of packages gcc-3.0 depends on:
ii binutils 2.12.90.0.1-1 The GNU assembler, linker and bina
ii cpp-3.0 1:3.0.4-6 The GNU C preprocessor.
ii gcc-3.0-base 1:3.0.4-6 The GNU Compiler Collection (base
ii libc6 2.2.5-3 GNU C Library: Shared libraries an
ii libgcc1 1:3.0.4-6 GCC support library.
---------------------------------------
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From: Matthias Klose <[EMAIL PROTECTED]>
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Date: Tue, 19 Nov 2002 07:56:07 +0100
To: [EMAIL PROTECTED]
Subject: Re: Bug#141015: c/8609: Superfluous warning when -std=c99/gnu99 and
noreturn on main()
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[EMAIL PROTECTED] writes:
> Synopsis: Superfluous warning when -std=c99/gnu99 and noreturn on main()
>
> State-Changed-From-To: analyzed->closed
> State-Changed-By: bangerth
> State-Changed-When: Mon Nov 18 17:13:39 2002
> State-Changed-Why:
> Closed based on these comments:
closing the Debian report as well.
