[PATCH] Deprecate -frepo option.

[Jan Hubicka]

> 
> > On 27 Jun 2019, at 19:21, Jan Hubicka <hubicka@ucw.cz> wrote:
> > 
> >> 
> >> It's useful on targets without COMDAT support.  Are there any such
> >> that we care about at this point?
> >> 
> >> If the problem is the combination with LTO, why not just prohibit that?
> > 
> > The problem is that at the collect2 time we want to decide whether to
> > hold stderr/stdout of the linker. The issue is that we do not know yet
> > if we are going to LTO (because that is decided by linker plugin) or
> > whether we do repo files (because we look for those only after linker
> > failure).
> 
> you could pre-scan for LTO, as is done for the collect2+non-plugin linker.
> (similar to the comment below, that would take some time, but probably
> small c.f the actual link).

the collect2+non-plugin does not handle static archives so it would need
more work while I think we should kill that code (and make darwin to use
lld)

Honza

> Iain
> 
> > We can look for repo files first but that could take some time
> > especially for large programs (probably not too bad compared to actual
> > linking later) or we may require -frepo to be passed to collect2.
> > 
> > Honza
> >> 
> >> Jason
>