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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/100629] Regression from 10 symbol mismatch between class
 definition and use with optimization
Date: Mon, 17 May 2021 07:08:15 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D100629

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2021-05-17
             Status|UNCONFIRMED                 |WAITING

--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #5)
> (In reply to Andrew Pinski from comment #3)
> > The difference is
> > PatternDriver::TemplateEnum<PatternDriver::complement_names[abi:cxx11]
> > vs
> > PatternDriver::TemplateEnum<PatternDriver::complement_names
>=20
> Sorry I just mean:
> PatternDriver::complement_names[abi:cxx11]
> vs
> PatternDriver::complement_names

Are you sure there is no define for _GLIBCXX_USE_CXX11_ABI used somewhere?
See https://gcc.gnu.org/onlinedocs/libstdc++/manual/using_dual_abi.html als=
o.=