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From: "andre dot maute at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug regression/19174] New: wrong code regression or library problem in gcc-4.0-20041226
Date: Tue, 28 Dec 2004 13:02:00 -0000 [thread overview]
Message-ID: <20041228130233.19174.andre.maute@gmx.de> (raw)
consider the following code snippet
-------- nan.cc -------
#include <iostream>
int main() {
double x = 0.55555555555555558023;
std::cout << x << " ";
std::cout << x << " ";
std::cout << std::endl;
return 0;
}
-------- nan.cc -------
> g++-4.0-20041226 -v
Using built-in specs.
Configured with: ../gcc-4.0-20041226/configure --prefix=/opt/gcc-4.0-20041226
--enable-shared --enable-languages=c,c++ --enable-threads=posix
--enable-__cxa_atexit --enable-clocale=gnu --disable-nls
--program-suffix=-4.0-20041226 --with-arch=pentium3 --disable-checking
Thread model: posix
gcc version 4.0.0 20041226 (experimental)
> g++-4.0-20041226 nan.cc
> ldd a.out
libstdc++.so.6 => /opt/gcc-4.0-20041226/lib/libstdc++.so.6 (0x40017000)
libm.so.6 => /lib/libm.so.6 (0x400fc000)
libgcc_s.so.1 => /opt/gcc-4.0-20041226/lib/libgcc_s.so.1 (0x4011f000)
libc.so.6 => /lib/libc.so.6 (0x40129000)
/lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x40000000)
> ./a.out
0.555556 nan
well this nan shouldn't be there
> g++-4.0-20041226 nan.cc -static
> ./a.out
0.555556 0.555556
> g++-4.0-20041212 -v
Reading specs from /opt/gcc-4.0-20041212/lib/gcc/i686-pc-linux-gnu/4.0.0/specs
Configured with: ../gcc-4.0-20041212/configure --prefix=/opt/gcc-4.0-20041212
--enable-shared --enable-languages=c,c++ --enable-threads=posix
--enable-__cxa_atexit --enable-clocale=gnu --disable-nls
--program-suffix=-4.0-20041212 --with-arch=pentium3 --disable-checking
Thread model: posix
gcc version 4.0.0 20041212 (experimental)
> g++-4.0-20041212 nan.cc
> ldd ./a.out
libstdc++.so.6 => /opt/gcc-4.0-20041212/lib/libstdc++.so.6 (0x40017000)
libm.so.6 => /lib/libm.so.6 (0x400fb000)
libgcc_s.so.1 => /opt/gcc-4.0-20041212/lib/libgcc_s.so.1 (0x4011e000)
libc.so.6 => /lib/libc.so.6 (0x40128000)
/lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x40000000)
> ./a.out
0.555556 0.555556
g++-4.0-20041212 doesn't have this problem
--
Summary: wrong code regression or library problem in gcc-4.0-
20041226
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Severity: critical
Priority: P2
Component: regression
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: andre dot maute at gmx dot de
CC: gcc-bugs at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19174
next reply other threads:[~2004-12-28 13:02 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-12-28 13:02 andre dot maute at gmx dot de [this message]
2004-12-28 14:29 ` [Bug regression/19174] " pinskia at gcc dot gnu dot org
2004-12-28 17:21 ` andre dot maute at gmx dot de
2004-12-28 18:03 ` andre dot maute at gmx dot de
2004-12-29 0:42 ` rth at gcc dot gnu dot org
2004-12-29 11:14 ` andre dot maute at gmx dot de
2005-01-01 23:58 ` andre dot maute at gmx dot de
2005-01-02 21:06 ` andre dot maute at gmx dot de
2005-01-02 23:44 ` andre dot maute at gmx dot de
2005-01-04 0:03 ` rth at gcc dot gnu dot org
2005-01-04 17:46 ` andre dot maute at gmx dot de
2005-01-10 0:00 ` andre dot maute at gmx dot de
2005-01-17 12:28 ` andre dot maute at gmx dot de
2005-01-19 21:22 ` rth at gcc dot gnu dot org
2005-01-20 6:59 ` rth at gcc dot gnu dot org
2005-01-24 10:42 ` andre dot maute at gmx dot de
2005-01-24 13:30 ` [Bug regression/19174] [4.0 Regression] " pinskia at gcc dot gnu dot org
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