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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/87858] Building old multilib bootstrap GCC: stage1
 32-bit libstdc++ fails to build after building 64-bit libstdc++
Date: Sat, 24 Jul 2021 22:23:00 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D87858

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|WONTFIX                     |---
             Status|RESOLVED                    |UNCONFIRMED

--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Matthew Krupcale from comment #6)
> (In reply to Andrew Pinski from comment #5)
> > Best way to support this really is to build a 4.8 cross compiler and th=
en
> > build a canandian cross GCC 4.8 and then bootstrap a 4.8.x using that n=
ewly
> > build canandian cross compiler.
>=20
> I'm not sure I follow exactly because I wasn't trying to build a cross
> compiler, although I suppose once you have a GCC 4.8 compiler built (cross
> or not), you wouldn't have a problem building 4.8.x with it in theory. But
> the problem is building that initial GCC 4.8 (cross or not) with the newer
> GCC version.


You misunderstood.  Building a cross compiler and a canadian cross is so the
new 4.8 compiler is NOT exposing to the bootstrap issue you mentioned.

4.8 and 8.x are no longer maintained so fixing those are out of the questio=
n.
stage1 of gcc does not require the LD_LIBRARY_PATH to be set at all and sta=
ge 2
and 3 will use -static-libstdc++.

Of course LD_LIBRARY_PATH shouldn't be needed these days.=