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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/96880] undefined reference to `__dynamic_cast' when
 compiling with -fsanitize=vptr and -static
Date: Tue, 01 Sep 2020 09:29:08 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D96880

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The problem is that lang_specific_driver adds -lstdc++ -lm before the gener=
ic
code adds -lubsan.
If you link normally (dynamically), it will work just fine.
Or you can always add -lubsan -lstdc++
Not sure how to fix this properly, the C++ lang_specific_driver doesn't see=
 the
-lubsan option that is only added later on and where exactly in the argumen=
ts
-lstdc++ ends up is not something gcc.c can predict.=