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From: "peter0x44 at disroot dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/110572] ld.lld: error: duplicate symbol:
 std::type_info::operator==(std::type_info const&) const
Date: Fri, 01 Sep 2023 21:30:17 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D110572

peter0x44 at disroot dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |peter0x44 at disroot dot o=
rg

--- Comment #5 from peter0x44 at disroot dot org ---

#include <typeinfo>
int main() { return typeid(0) =3D=3D typeid(0); }

The following reproduces for me, although strangely only with -std=3Dc++23 =
and
-static-libstdc++.

x86_64-w64-mingw32-g++ test.cpp -static-libstdc++ -std=3Dc++20
// no error

x86_64-w64-mingw32-g++ test.cpp -static-libstdc++ -std=3Dc++23
/usr/lib/gcc/x86_64-w64-mingw32/12.2.0/../../../../x86_64-w64-mingw32/bin/l=
d:
/usr/lib/gcc/x86_64-w64-mingw32/12.2.0/../../../../x86_64-w64-mingw32/lib/.=
./lib/libstdc++.a(tinfo.o):
in function `std::type_info::operator=3D=3D(std::type_info const&) const':
/build/mingw-w64-gcc/src/gcc/libstdc++-v3/libsupc++/tinfo.cc:42: multiple
definition of `std::type_info::operator=3D=3D(std::type_info const&) const';
/tmp/ccyAJVlk.o:test.cpp:(.text$_ZNKSt9type_infoeqERKS_[_ZNKSt9type_infoeqE=
RKS_]+0x0):
first defined here

Related issue:
https://github.com/skeeto/w64devkit/issues/86=