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From: David Chisnall <theraven@theravensnest.org>
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Date: Fri, 30 Dec 2011 13:28:51 +0000
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References: <20111226101040.GA6361@freebsd.org> <4EFDB76C.1030901@FreeBSD.org>
To: Dimitry Andric <dim@freebsd.org>
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Cc: Alexander Best <arundel@freebsd.org>, freebsd-toolchain@freebsd.org,
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Subject: Re: [rfc] removing/conditionalising WERROR= in Makefiles
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On 30 Dec 2011, at 13:06, Dimitry Andric wrote:

>  sys/gnu/fs/xfs/xfs_dir2_block.c:1149:17: warning: array index of '1' =
indexes past the end of an array (that contains 1 element) =
[-Warray-bounds]

I recall some discussion of this warning on the clang list a few months =
ago, and I believe that it should now only appear if you are compiling =
in a C99 or C11 dialect mode (the rationale is that any variable-length =
structures in C99 should be using a zero-sized array as the final =
element, while C89 lacked any ability to do this). =20

I suspect a lot of similar warnings are caused by the difference in =
default dialects between clang and gcc.  Adding an explicit -std=3Dc89 =
to the cflags any modules that are using an archaic dialect of C may =
silence a lot of these...

David=