> You need to handle them in lto-opts.c and output them to the existing option
> section. Not sure why they don't appear there already - ah, because of
>
> /* Also drop all options that are handled by the driver as well,
> which includes things like -o and -v or -fhelp for example.
> We do not need those. Also drop all diagnostic options. */
> if (cl_options[option->opt_index].flags & (CL_DRIVER|CL_WARNING))
> continue;
>
> and -fsanitize= being marked as Driver. Looks like we have to drop
> things explicitely here given that -o is also Common Driver. Or simply
> have
>
> if (cl_options[option->opt_index].flags & (CL_DRIVER|CL_WARNING))
> switch (option->opt_index)
> {
> case OPT_fsanitize_:
> break;
> default:
> continue;
> }
>
Or even better add a new CL_LTOCOLLECT and mark all options that need
LTO handling as LTOCollect in the *.opt files, no? In the future, we
could extend the syntax to encode the various relationships.
At some moment, GCC will need a lto-options.def and generate
lto-options.c and some parts of lto-wrapper.c from it. How long is
this can going to be kicked down the road?
Cheers,
Manuel.
