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Subject: [Bug target/97865] MACOSX_DEPLOY_TARGET needs to be updated
Date: Tue, 17 Nov 2020 10:49:01 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D97865

--- Comment #7 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to J=C3=BCrgen Reuter from comment #6)
> (In reply to Iain Sandoe from comment #5)
> > I bootstrapped several times (without using MACOSX_DEPLOYMENT_TARGET) a=
nd
> > have been looking into other issues.
> >=20
> > Note that the libgfortran directory throws up a lot of warnings when
> > 'autoreconf'ed' so maybe there's some things to be looked at there anyw=
ay.
>=20
> Ok, sorry, my reply was not so clear (even to me): I also never used
> MACOSX_DEPLOYMENT_TARGET myself. The main point in my fix is that libtool
> defaults to 10.0 for the TARGET, and then the second option matches, not =
the
> first one because now there is not darwin1x.x anymore, but darwin20. In a=
ny
> case, it looks like that Fortran code that either uses bind(C) to C++
> libraries or legacy Fortran code based on common blocks produces ubiquito=
us
> SIGABRT when compiled with -Wl,-flat_namespace and without
> -Wl,-dynamic_lookup.

OK. I'll take a look at this (and the config.sub) and ask which things we p=
atch
and which we import - who is responsible for maintaining Darwin in lib tool?

(I worked with Ben Elliston to test the newer config.sub across a range of
Darwin machines, so fairly sure that's OK [but testing still needed of
course]).=