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Date: Tue, 17 May 2022 18:05:57 -0500
From: Segher Boessenkool <segher@kernel.crashing.org>
To: "muzungu@gmx.net" <muzungu@gmx.net>
Cc: gcc-help@gcc.gnu.org
Subject: Re: gcc optimization options and lto (detailed info)
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On Tue, May 17, 2022 at 08:56:20AM +0200, muzungu--- via Gcc-help wrote:
> * -O<x> combines a collection of -f<xyz>

It does more than that.  Each -O<x> enables many things that can be
separately enabled and disabled with -f<xxx> flags, but there are
hundreds if not thousands other things that are sirectly controlled by
optimisation level.


Segher