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Date:      Tue, 07 Apr 2020 21:22:52 +0000
From:      bugzilla-noreply@freebsd.org
To:        vbox@FreeBSD.org
Subject:   [Bug 244962] emulators/virtualbox-ose-additions mount -t vboxsf Operation not supported by device
Message-ID:  <bug-244962-26505-fii1JX08P4@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-244962-26505@https.bugs.freebsd.org/bugzilla/>
References:  <bug-244962-26505@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D244962

--- Comment #11 from Mateusz Guzik <mjg@FreeBSD.org> ---
This is probably an optimization which is only there because of something w=
rong
with headers.

There is one fundamental discrepancy between bcmp and memcmp: the former on=
ly
indicates there is a difference while the latter computes what it is on the
first differing byte. Thus, if bcmp is provided and buffers differ, it has =
less
work to do than memcmp and is a better pick if available.

However, FreeBSD headers explicitly define bcmp as builtin_memcmp, therefore
the above should not be happening if they are properly included and the def=
ines
are not overwritten. Once more this is just some build mess.

--=20
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