[Bug 3441] Build openssh with sanitizer flags enabled

[bugzilla-daemon at mindrot.org]

https://bugzilla.mindrot.org/show_bug.cgi?id=3441

--- Comment #9 from Darren Tucker <dtucker at dtucker.net> ---
I committed a change to configure.ac to skip the check in this case.

With that and the following configure invocation on an unmodified
current source tree I got it to work, at least as far as getting a leak
report from the preauth privsep process.  This seems to work for both
gcc and clang, although the reports from clang seem much better.

$ sudo mkdir -p /chroot/proc
$ sudo mount -t proc proc /chroot/proc
$ CC=clang-14 ./configure --disable-security-key --disable-pkcs11
--without-sandbox --with-cflags=-fsanitize=address
--with-ldflags=-fsanitize=address --with-privsep-path=/chroot
--with-privsep-user=root

Obviously, using "root" as the privsep user is not suitable for
production use.

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