On Sun, 4 Dec 2022, 08:49 hongjie wu via Gcc-help, <gcc-help@gcc.gnu.org>
wrote:

> Dear Sir or Madam，
>         I want to know how to obtain optimal level of the value of the
> specific compiler options, for example  - fexcess - precision = [fast |
> standard] [default], including the default represent？Or how to determine?
>         I am looking forward to your favorable replay.
>


See the --help= documentation in the manual.

gcc -Q --help=optim