On Thu, Sep 28, 2023 at 4:00 PM Toon Moene <toon@moene.org> wrote:

> On 9/28/23 21:26, Jakub Jelinek wrote:
>
> > It is worse than that, usually the LTO format changes e.g. any time any
> > option or parameter is added on a release branch (several times a year)
> and
> > at other times as well.
> > Though, admittedly GCC is the single package that actually could get away
> > with LTO in lib*.a libraries, at least in some packagings (if the static
> > libraries are in gcc specific subdirectories rather than say
> /usr/lib{,64}
> > or similar and if the packaging of gcc updates both the compiler and
> > corresponding static libraries in a lock-step.  Because in that case LTO
> > in there will be always used only by the same snapshot from the release
> > branch and so should be compatible with the LTO in it.
> This might be an argument to make it a configure option, e.g.
> --enable-lto-runtime.
>
> Note that not all targets support LTO, so the option cannot be added
unilaterally.

David