Re: [PATCH] Makefile: use compat regex with SANITIZE=address

> Recent versions of the gcc and clang Address Sanitizer produce test
> failures related to regexec(). This triggers with gcc-10 and clang-8
> (but not gcc-9 nor clang-7). Running:
>
>   make CC=gcc-10 SANITIZE=address test
>
> results in failures in t4018, t3206, and t4062.
> ...
> We can work around that by having the preprocessor replace regexec with
> git_regexec (both in the callers and in the actual implementation), and
> we truly end up with a call to our custom regex code, even when
> compiling with ASan. That's probably a good thing to do anyway, as it
> means anybody looking at the symbols later (e.g., in a debugger) would
> have a better indication of which function is which. So we'll do the
> same for the other common regex functions (even though just regexec() is
> enough to fix this ASan problem).
>
> Signed-off-by: Jeff King <peff@peff.net>
> ---
>  Makefile             | 3 +++
>  compat/regex/regex.h | 5 +++++
>  2 files changed, 8 insertions(+)