On Sat, Nov 20, 2021 at 12:24:21AM -0800, Andrew Pinski via Gcc-patches wrote:
> On Sat, Nov 20, 2021 at 12:18 AM Jacob Kroon via Gcc-patches
> <gcc-patches@gcc.gnu.org> wrote:
> >
> > cc1/cc1plus both include a checksum of the object files, archives and
> > options used during linking. Unless the host binutils has been built
> > with --enable-deterministic-archives, the archives will have different
> > checksums each build due to changes in timestamps of the containing
> > object files, and thus the checksum that is embedded in cc1/cc1plus will
> > also change.
> >
> > Fix this by passing "D" to ar/ranlib when creating the archives.
>
> How portable is the D option? That does it work with Mac OS X's ar;
> what about AIX's ar; what about Solaris's ar, etc?
> GNU binutils is not the only ar which is supported for the host.
It isn't portable and even if ar/ranlib do support that option, not all
users will want it, so forcing it upon them unconditionally is IMO not a
good idea. If anything, configure needs to check if those options are
supported and there needs to be preferrably non-default gcc configure
option to request it.
Jakub
