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Re: [PATCH] Enable AVX2 optimized memset only if -mavx2 works
- From: Roland McGrath <roland at hack dot frob dot com>
- To: "H.J. Lu" <hjl dot tools at gmail dot com>
- Cc: myllynen at redhat dot com, Ling Ma <ling dot ma dot program at gmail dot com>, GNU C Library <libc-alpha at sourceware dot org>, Ondrej Bilka <neleai at seznam dot cz>, Liubov Dmitrieva <liubov dot dmitrieva at gmail dot com>, Ling Ma <ling dot ml at alibaba-inc dot com>
- Date: Thu, 10 Jul 2014 11:42:58 -0700 (PDT)
- Subject: Re: [PATCH] Enable AVX2 optimized memset only if -mavx2 works
- Authentication-results: sourceware.org; auth=none
- References: <CAMe9rOq0SeKyFN0f_7AT_xMP2zyDD6gUQG3Jdv+NSTf5VO=0XQ at mail dot gmail dot com> <53B2DD8D dot 4030908 at redhat dot com> <CAMe9rOpxfyxoet24+pbihErfgnYDDZ=kCCjeUSXt_HVsKfwVhg at mail dot gmail dot com> <20140710182437 dot 8708F2C39CC at topped-with-meat dot com> <CAMe9rOqMndMuVjWyKWpu9DovLadL4CVVhikmR7sBqDc4MGz04A at mail dot gmail dot com>
> This patch disables AVX2 optimization if AVX2 isn't supported. Otherwise,
> glibc fails to build:
>
> https://sourceware.org/ml/libc-alpha/2014-07/msg00007.html
That message and the one you quoted in your previous posting just contain
the new code that was committed on June 19. So your posting did not seem
to include your actual change.