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From: "unlvsur at live dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/103453] ASAN detection with clang
Date: Wed, 01 Dec 2021 01:22:20 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103453

--- Comment #7 from cqwrteur <unlvsur at live dot com> ---
(In reply to cqwrteur from comment #6)
> (In reply to Jonathan Wakely from comment #3)
> > Fixed on trunk so far, but this is backportable.
>=20
> Turns out _GLIBCXX_SANITIZE_VECTOR is not defined if libsanitizer is not
> built with GCC. But GCC does not support sanitizers on windows.
>=20
> Can we just remove this macro and only use _GLIBCXX_SANITIZE_STD_ALLOCATO=
R?

clang++ -o vec vec.cc -Ofast -std=3Dc++2b -fuse-ld=3Dlld
-fsanitize=3Daddress,undefined -D_GLIBCXX_SANITIZE_VECTOR

D:\hg\fast_io\examples\0007.legacy>vec
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
=3D=3D10284=3D=3DERROR: AddressSanitizer: container-overflow on address 0x0=
21fa68f6bd8
at pc 0x7ff7dae516df bp 0x00347beff840 sp 0x00347beff888
WRITE of size 8 at 0x021fa68f6bd8 thread T0

Also works=