On Thu, 18 Apr 2024 at 21:34, Jonathan Wakely wrote:
>
> On Thu, 18 Apr 2024 at 20:51, Jonathan Wakely wrote:
> >
> > This completes the fixes to put all experimental symbols into
> > libstdc++exp.a.
> >
> > On trunk the libstdc++_libbacktrace.a was removed completely and its
> > contents aded to libstdc++exp.a instead. We don't want to do that on the
> > gcc-13 branch because it will break makefiles using it. We can add the
> > contents to libstdc++exp.a and then install a symlink so that
> > -lstdc++_libbacktrace still works, but links to libstdc++exp.a instead.
>
> It looks like simply duplicating all the libstdc___libbacktrace_FOO
> variables in libbacktrace/Makefile.am does work (see attached patch),
> so that we get an installed libstdc++_libbacktrace.a and a
> not-installed libstdc++_libbacktraceconvenience.a which gets included
> into the installed libstdc++exp.a
>
> So if that's preferable to making the installed
> libstdc++_libbacktrace.a a symlink, we can do that.
>
> I still kinda like the symlink approach, because it reduces the size
> on disk, and the same approach could be used to get rid of
> libstdc++fs.a without breaking makefiles using -lstdc++fs

I committed the symlink approach, but with a slightly different patch
(attached).

This one installs libstdc++_libbacktrace.a as a symlink, but also
removes the .la libtool file for that archive, because I don't think
it's any use. I also added an uninstall-local target so the symlink
gets removed.