From: "H. Peter Anvin" <hpa@zytor.com>
Subject: Re: [PATCH 2/7] Makefile, x86, LLVM: disable unsupported optimization
 flags
Date: Fri, 17 Mar 2017 14:34:45 -0700
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Cc: Alexander Potapenko <glider@google.com>,
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To: Michael Davidson <md@google.com>, Michal Marek <mmarek@suse.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>,
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On 03/17/17 14:32, H. Peter Anvin wrote:
> 
> NAK.  Fix your compiler, or use a wrapper script or something.  It is
> absolutely *not* acceptable to disable this since future versions of
> clang *should* support that.
> 
> That being said, it might make sense to look for a key pattern like
> "(un|not )supported" on stderr the try-run macro.  Is there really no
> -Wno- or -Werror= option to turn off this craziness?
> 

Well, guess what... I found it myself.

-W{no-,error=}ignored-optimization-argument

Either variant will make this sane.

	-hpa