The method of determining the specific assignment of gcc optimization options

[Jonathan Wakely]

This question belongs on the gcc-help mailing list, not here.

On Fri, 9 Dec 2022 at 12:01, hongjie wu via Gcc <gcc@gcc.gnu.org> wrote:
>
> Dear Sir or Madam，
>         I want to know how to obtain optimal level of the value of the

What do you mean by optimal?

They have pros and cons.

> specific compiler options, for example  - fexcess - precision = [fast |
> standard] [default], including the default represent？Or how to determine?

gcc -Q --help=optim

>         I am looking forward to your favorable replay.