> On 27 Jun 2019, at 19:21, Jan Hubicka <hubi...@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). 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
