RFC: #pragma optimization_level

[Gerald Pfeifer]

On Fri, 1 Apr 2005, Joe Buck wrote:
> Unfortunately, where there is a good argument for not using empty loops
> as busy-waits, at one time it was documented GCC behavior that it would
> work, so we can't really blame the users for trusting the doc.

However, it's really a looong time since we clarified that:

  Mon Dec 28 19:26:32 1998  Gerald Pfeifer  <pfeifer@dbai.tuwien.ac.at>

        * gcc.texi (Non-bugs): ``Empty'' loops will be optimized away in
        the future; indeed that already happens in some cases.

Gerald