Re: -z defs linker flag activated in Fedora rawhide

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On Tue, 2018-03-06 at 12:20 +0100, Florian Weimer wrote:
> On 03/05/2018 05:55 PM, Sérgio Basto wrote:
> > On Mon, 2018-01-22 at 16:24 +0100, Florian Weimer wrote:
> > > ### Disable strict symbol checks in the link editor (ld)
> > > 
> > > By default, the link editor will refuse to link shared objects
> > > which
> > > contain undefined symbols.  In some cases (such as when a DSO is
> > > loaded as a plugin and is expected to bind to symbols in the main
> > > executable), undefined symbols are expected.  In this case, you
> > > can
> > > add
> > > 
> > >       %undefine _strict_symbol_defs_build
> > > 
> > > to the RPM spec file to disable these strict
> > > checks.  Alternatively,
> > > you can pass `-z undefs` to ld (written as `-Wl,-z,undefs` on the
> > > gcc
> > > command line).  The latter needs binutils 2.29.1-12.fc28 or
> > > later.
> > > 
> > > 
> > > This is also part of the build flags documentation at:
> > > 
> > > <https://src.fedoraproject.org/rpms/redhat-rpm-config/blob/master
> > > /f/b
> > > uildflags.md>
> > IMHO, also in https://fedoraproject.org/wiki/Changes/BINUTILS2291
> > or
> > should link to  https://src.fedoraproject.org/rpms/redhat-rpm-confi
> > g/bl
> > ob/master/f/buildflags.md or should mention that we may use:
> > %undefine _strict_symbol_defs_build
> 
> The change was reverted, so this is currently not necessary.
> 
> The next change will discuss remedies.

Again, IMHO, wiki page should be updated (add something like: -z defs
was postponed ... ) and still it should be added a link to
buildflags.md . 

BTW "%define _strict_symbol_defs_build 1" will enable -z defs ? 


Thanks,
-- 
Sérgio M. B.
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