Bug#211661: marked as done (gcc-3.3: With -std=c99, the NAN and INFINITY macros are not regarded as constants)
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and subject line Bug#211661: gcc-3.3: With -std=c99, the NAN and INFINITY macros are not regarded as constants
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>From vincent@vinc17.org Fri Sep 19 04:26:09 2003
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Date: Fri, 19 Sep 2003 11:26:04 +0200
From: Vincent Lefevre <vincent@vinc17.org>
To: Debian Bug Tracking System <submit@bugs.debian.org>
Subject: gcc-3.3: With -std=c99, the NAN and INFINITY macros are not regarded as constants
Message-ID: <20030919092604.GA20362@greux.loria.fr>
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Package: gcc-3.3
Version: 1:3.3.2-0pre3
Severity: normal
When compiling the following program with gcc -std=c99
#include <math.h>
int main (void)
{
static double x = NAN;
return x == 0;
}
I get:
testconstnan.c: In function `main':
testconstnan.c:27: error: initializer element is not constant
But the ISO C standard says (7.12):
[#5] The macro
NAN
is defined if and only if the implementation supports quiet
NaNs for the float type. It expands to a constant
expression of type float representing a quiet NaN.
-- System Information:
Debian Release: testing/unstable
Architecture: i386
Kernel: Linux greux.loria.fr 2.4.20 #2 Mon Mar 31 18:37:25 CEST 2003 i686
Locale: LANG=C, LC_CTYPE=en_US.ISO8859-1
Versions of packages gcc-3.3 depends on:
ii binutils 2.14.90.0.6-1 The GNU assembler, linker and bina
ii cpp-3.3 1:3.3.2-0pre3 The GNU C preprocessor
ii gcc-3.3-base 1:3.3.2-0pre3 The GNU Compiler Collection (base
ii libc6 2.3.2-6 GNU C Library: Shared libraries an
ii libgcc1 1:3.3.2-0pre3 GCC support library
-- no debconf information
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>From vincent@vinc17.org Fri Aug 19 14:28:41 2005
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Date: Fri, 19 Aug 2005 23:28:33 +0200
From: Vincent Lefevre <vincent@vinc17.org>
To: Matthias Klose <doko@cs.tu-berlin.de>
Cc: 211661-done@bugs.debian.org
Subject: Re: Bug#211661: gcc-3.3: With -std=c99, the NAN and INFINITY macros are not regarded as constants
Message-ID: <20050819212833.GA11421@ay.vinc17.org>
References: <20030919092604.GA20362@greux.loria.fr> <16248.43919.145922.927273@gargle.gargle.HOWL> <20031001072812.GA15318@ay.nerim.net> <20031001155224.GG28888@ay.nerim.net>
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On 2003-10-01 17:52:24 +0200, Vincent Lefevre wrote:
> According to a friend of mine, the current libc6 construction for
> NAN was supported (as a constant) by GCC 3.0, but this is no longer
> correct as of GCC 3.1. As a consequence, glibc needs to be updated.
I'm closing this bug since I cannot reproduce the problem with
gcc 3.3, gcc 3.4 and gcc 4.0. I assume that it has been fixed.
--
Vincent Lefèvre <vincent@vinc17.org> - Web: <http://www.vinc17.org/>
100% accessible validated (X)HTML - Blog: <http://www.vinc17.org/blog/>
Work: CR INRIA - computer arithmetic / SPACES project at LORIA
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