And what's the purpose of that? Alexey On 10/12/09, Kevin P. Fleming <kpfleming@xxxxxxxxxx> wrote: > Mike Sullivan wrote: >>> There was another interesting question in that mail: is "-O1" flag >>> something different from just combination of "-fsomething" flags? >> >> This really is the question I'm interested in. The problem itself was >> fixed, I just don't understand why applying the same optimizations >> (and more) which make up -O1 don't elicit the same behavior. > > This is frequently asked on this list, and the answer is always the > same: yes, the -O<N> flag does more than just enable a series of -f<foo> > flags. Said another way, there are optimizations that do *not* have > -f<foo> flags that control them, they are enabled by directly checking > the value supplied to the -O flag, and they cannot be directly controlled. > > -- > Kevin P. Fleming > Digium, Inc. | Director of Software Technologies > 445 Jan Davis Drive NW - Huntsville, AL 35806 - USA > skype: kpfleming | jabber: kpfleming@xxxxxxxxxx > Check us out at www.digium.com & www.asterisk.org >
