[PATCH 1/2] Sync with binutils: GCC: Pass --plugin to AR and RANLIB

[H.J. Lu]

On Mon, Nov 22, 2021 at 4:29 PM Jeff Law <jeffreyalaw@gmail.com> wrote:
>
>
>
> On 11/13/2021 9:33 AM, H.J. Lu via Gcc-patches wrote:
> > Sync with binutils for building binutils with LTO:
> >
> >  From 50ad1254d5030d0804cbf89c758359ae202e8d55 Mon Sep 17 00:00:00 2001
> > From: "H.J. Lu" <hjl.tools@gmail.com>
> > Date: Sat, 9 Jan 2021 06:43:11 -0800
> > Subject: [PATCH] GCC: Pass --plugin to AR and RANLIB
> >
> > Detect GCC LTO plugin.  Pass --plugin to AR and RANLIB to support LTO
> > build.
> >
> >       * Makefile.tpl (AR): Add @AR_PLUGIN_OPTION@
> >       (RANLIB): Add @RANLIB_PLUGIN_OPTION@.
> >       * configure.ac: Include config/gcc-plugin.m4.
> >       AC_SUBST AR_PLUGIN_OPTION and RANLIB_PLUGIN_OPTION.
> >       * libtool.m4 (_LT_CMD_OLD_ARCHIVE): Pass --plugin to AR and
> >       RANLIB if possible.
> >       * Makefile.in: Regenerated.
> >       * configure: Likewise.
> >
> > config/
> >
> >       * gcc-plugin.m4 (GCC_PLUGIN_OPTION): New.
> >
> > libiberty/
> >
> >       * Makefile.in (AR): Add @AR_PLUGIN_OPTION@
> >       (RANLIB): Add @RANLIB_PLUGIN_OPTION@.
> >       (configure_deps): Depend on ../config/gcc-plugin.m4.
> >       * configure.ac: AC_SUBST AR_PLUGIN_OPTION and
> >       RANLIB_PLUGIN_OPTION.
> >       * aclocal.m4: Regenerated.
> >       * configure: Likewise.
> >
> > zlib/
> >
> >       * configure: Regenerated.
> I thought the plugins were automatically loaded if they're in the right
> place in the filesystem.  Wouldn't that make this patch unnecessary?  Am
> I missing something?
>

It only works for system GCC and binutils.  It doesn't work for non-system
GCC nor binutils since either GCC plugin isn't installed in the binutils plugin
search patch.

-- 
H.J.