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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgcc/113403] __builtin_nested_func_ptr_created,
 __builtin_nested_func_ptr should be dynamically linked by default
Date: Mon, 15 Jan 2024 17:46:45 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D113403

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

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

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Florian Weimer from comment #2)
> Weak symbols have no meaning for ELF DSOs, so this wouldn't work for
> libgcc_s on ELF targets. Instead we automatically link against dynamic
> libgcc_s if certain symbols not in libgcc.a are referenced. Sources built
> with -ftrampoline-impl=3Dheap -fexceptions can already trigger such a
> dependency for _Unwind_Resume because it's used in the cleanup handler, f=
or
> example.

What we could do is make -shared-libgcc the default when using
-ftrampoline-impl=3Dheap (similarly how linking with g++ instead of gcc mak=
es it
the default), obviously unless use explicitly asks for -static-libgcc or
-shared-libgcc.=