Package: gcc-4.3
Version: 4.3.1-2
Severity: serious
When using the following (somewhat contrived code):
------
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
void
misc (uint8_t **header)
{
uint8_t *h;
h = malloc(8);
*((uint64_t *) h) = (uint64_t) 0;
*((uint32_t *) h) = (uint32_t) 0xffffffff;
*header = h;
}
int
main(int argc, char **argv)
{
uint8_t *h;
misc (&h);
printf ("%x\n", *((uint32_t *)h));
return 0;
}
-------
The result should clearly be ffffffff. Without optimisations:
$ /usr/bin/gcc-4.3 -Wall /tmp/test.c -o /tmp/test -fschedule-insns; /tmp/test
ffffffff
With -fschedule-insns -fstrict-aliasing:
$ /usr/bin/gcc-4.3 -Wall /tmp/test.c -o /tmp/test -fschedule-insns
-fstrict-aliasing
$ /tmp/test
0
This error causes the gstreamer testsuite to break on powerpc.
Sjoerd
-- System Information:
Debian Release: lenny/sid
APT prefers oldstable
APT policy: (500, 'oldstable'), (500, 'unstable'), (500, 'testing'), (101,
'experimental')
Architecture: powerpc (ppc)
Kernel: Linux 2.6.25-2-powerpc
Locale: LANG=C, LC_CTYPE=nl_NL (charmap=ISO-8859-1)
Shell: /bin/sh linked to /bin/dash
Versions of packages gcc-4.3 depends on:
ii binutils 2.18.1~cvs20080103-7 The GNU assembler, linker and bina
ii cpp-4.3 4.3.1-2 The GNU C preprocessor
ii gcc-4.3-base 4.3.1-2 The GNU Compiler Collection (base
ii libc6 2.7-12 GNU C Library: Shared libraries
ii libgcc1 1:4.3.1-2 GCC support library
ii libgomp1 4.3.1-2 GCC OpenMP (GOMP) support library
Versions of packages gcc-4.3 recommends:
ii libc6-dev 2.7-12 GNU C Library: Development Librari
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