Re: optimization issue about -O2 and -Os

[Dale Johannesen <dalej at apple dot com>]

On Apr 29, 2004, at 9:05 PM, Jim Wilson wrote:
> On Thu, 2004-04-29 at 19:34, Ebony Zhu wrote:
> > Have you ever been troubled in the same problem? Are you sure it's a 
> > gcc
> > bug, and not a mistake I probably made when building the cross tool?
> > (e.g. missed some important options when building gcc).
>
> If something compiled with -O2 works and something compiled with -Os
> does not work, then the logical conclusion is that the -Os option is
> buggy.

This is most likely, but it's also possible you have a source code bug 
that
happens to "work" (i.e. do what you intended) with -O2 but not -Os.
Regardless, debugging it is the right way to go.