Re: [Bayes++] Segmentation fault with gcc 4.1

[Michael S. <ma...@mi...>]

On Tuesday 19 December 2006 21:22, Nicola Bellotto wrote:
> Hello,
>
> I have recently installed Linux on a new laptop with an Intel Core 2 Duo
> processor. After compiling the last version Bayes++ (2003.8-6), I had a
> segmentation fault when I tried to run the sample PV_SIR.
> With a little of backtrace, I discovered the cause was the gcc
> option '-fstrict-aliasing', included in the '-O2' optimization. Removed
> that option and inserting manually all the others included in '-O2' and
> '-O3', the program run successfully.
> It's not clear to me whether the problem is on gcc, kernel or Bayes++.
>
> The gcc I use is the following:
> gcc (GCC) 4.1.1 20061011 (Red Hat 4.1.1-30)
> Copyright (C) 2006 Free Software Foundation, Inc.
> This is free software; see the source for copying conditions.  There is NO
> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
>
> This is the kernel version;
> 2.6.18-1.2849.fc6 #1 SMP Fri Nov 10 12:45:28 EST 2006 i686 i686 i386
> GNU/Linux
>
> Cheers,
>
> Nicola

The following GCC bug may be the root cause.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30088

The bug seems to be rather unstable. My later version of GCC 
'version 4.1.2 20061115 (prerelease) (SUSE Linux)' does not seem to have a 
problem with Bayes++ but the problem probably exists in other situations.

Michael


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