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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/97865] MACOSX_DEPLOY_TARGET needs to be updated
Date: Tue, 17 Nov 2020 14:04:54 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D97865

--- Comment #9 from J=C3=BCrgen Reuter <juergen.reuter at desy dot de> ---
(In reply to Iain Sandoe from comment #8)
> (In reply to J=C3=BCrgen Reuter from comment #4)

>=20
> It's OK to need it (there are legitimate design reasons to do so) - howev=
er
> where that need exists, the -Wl,-undefined,dynamic_lookup should be appli=
ed
> to the specific configuration (with eyes open as to why, of course).
>=20
> Placing it in the libtool.m4 (and regenerating the configurations) applies
> it globally to everything in the GCC tree which isn't right.

Yes, I understand. Our code finally links dynamically:

        /usr/local/lib/libgcc_s.1.dylib (compatibility version 1.0.0, curre=
nt
version 1.0.0)
        /usr/local/lib/libgfortran.5.dylib (compatibility version 6.0.0,
current version 6.0.0)
        /usr/local/lib/libquadmath.0.dylib (compatibility version 1.0.0,
current version 1.0.0)/usr/local/lib/libstdc++.6.dylib (compatibility versi=
on
7.0.0, current version 7.29.0)

So, I guess at least one of those libraries has to be built with the
-dynamic_lookup in order to work properly. I would guess it is libgfortran,=
 but
maybe not only.=