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Re: [PATCH 2/N, MPX, x86_64] Intel MPX support in glibc for x86_64
- From: "Joseph S. Myers" <joseph at codesourcery dot com>
- To: Carlos O'Donell <carlos at redhat dot com>
- Cc: "Zamyatin, Igor" <igor dot zamyatin at intel dot com>, "libc-alpha at sourceware dot org" <libc-alpha at sourceware dot org>, "hjl dot tools at gmail dot com" <hjl dot tools at gmail dot com>, OndÅej BÃlka <neleai at seznam dot cz>
- Date: Fri, 25 Apr 2014 14:30:22 +0000
- Subject: Re: [PATCH 2/N, MPX, x86_64] Intel MPX support in glibc for x86_64
- Authentication-results: sourceware.org; auth=none
- References: <0EFAB2BDD0F67E4FB6CCC8B9F87D756942973E8E at IRSMSX101 dot ger dot corp dot intel dot com> <5359FBA4 dot 7010203 at redhat dot com>
On Fri, 25 Apr 2014, Carlos O'Donell wrote:
> You should test for __int128, set HAVE_INT128, and make this
> support conditional on the compiler feature being present
> (avoid hard-coding the compiler version). I believe Ondrej
> posted a patch for this?
bits/link.h is an installed header so can't contain conditionals on
configure test results like that.
However, the __int128_t built-in typedef is much older than the __int128
keyword (dating back to GCC 3.0, i.e. predating x86_64 support which was
added in 3.1), so that can be used instead.
--
Joseph S. Myers
joseph@codesourcery.com