Bug#318959: gcc-4.0: compiles broken code

[Thorsten Jordan <Thorsten_Jordan@gmx.de>]

Package: gcc-4.0
Version: 4.0.1-2
Severity: grave
Justification: renders package unusable


gcc-4.0 generates code that gives false results for this
tiny program:

#include <stdio.h>
#include <math.h>
int main()
{
volatile double a = 1.04837e+06, b = 1.04866e+06;
printf("%li %li\n", lround(a), lround(b));
return 0;
}

compilation with -O1 or -O2 gives wrong results for
lround(b), although the number would fit the long
variable obviously.



-- System Information:
Debian Release: testing/unstable
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: i386 (i686)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.12
Locale: LANG=de_DE, LC_CTYPE=de_DE (charmap=ISO-8859-1)

Versions of packages gcc-4.0 depends on:
ii  binutils                    2.16.1-2     The GNU assembler, linker
and bina
ii  cpp-4.0                     4.0.1-2      The GNU C preprocessor
ii  gcc-4.0-base                4.0.1-2      The GNU Compiler Collection
(base
ii  libc6                       2.3.2.ds1-22 GNU C Library: Shared
libraries an
ii  libgcc1                     1:4.0.1-2    GCC support library

Versions of packages gcc-4.0 recommends:
ii  libc6-dev                   2.3.2.ds1-22 GNU C Library: Development
Librari
ii  libmudflap0-dev             4.0.1-2      GCC mudflap support
libraries (dev

-- no debconf information