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
