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Re: Problem when using optimization on aix 5.2 and gcc 4.1.1
- From: Joe Buck <Joe dot Buck at synopsys dot COM>
- To: Thomas Mittelstaedt <T dot Mittelstaedt at cadenas dot de>
- Cc: gcc at gcc dot gnu dot org
- Date: Mon, 21 May 2007 10:31:32 -0700
- Subject: Re: Problem when using optimization on aix 5.2 and gcc 4.1.1
- References: <op.tsoshl0c3gkkc3@cprog027>
On Mon, May 21, 2007 at 07:06:47PM +0200, Thomas Mittelstaedt wrote:
> Hello,
>
> We have a large app with a lot of static libraries in it (and I mean a
> lot, about 20) and it compiles and links successfully. If I compile it
> without optimiztion turned on
> (-O2 or some more subtle with -O and others), the program also runs.
> With optimizations, though, the program would crash.
While compiler bugs are possible, it is much more likely that
it is a program bug. Common causes are uninitialized memory or heap
corruption; the effects of this tend to change with optimization.