D40673: Add _Float128 as alias to __float128 to enable compilations on Fedora27/glibc2-26

[Blower, Melanie via cfe-commits]

> -----Original Message-----
> From: Szabolcs Nagy via Phabricator [mailto:reviews at reviews.llvm.org]
> Sent: Thursday, January 11, 2018 6:25 AM
> To: Blower, Melanie <melanie.blower at intel.com>; Keane, Erich
> <erich.keane at intel.com>; scanon at apple.com; roger.ferreribanez at arm.com;
> sjoerd.meijer at arm.com; jlebar at google.com;
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> Cc: szabolcs.nagy at arm.com; james.greenhalgh at arm.com;
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> cfe-commits at lists.llvm.org; mlekena at skidmore.edu; jkorous at apple.com;
> shenhan at google.com; tra at google.com
> Subject: [PATCH] D40673: Add _Float128 as alias to __float128 to enable
> compilations on Fedora27/glibc2-26
> 
> nsz added a comment.
> 
> also note that there is less than 3 weeks until glibc-2.27 is released, if the
> headers need a fix for clang then say so quickly
> 
> i opened https://sourceware.org/bugzilla/show_bug.cgi?id=22700 but it needs
> attention from some clang developers, in particular there is no way to check if
> the compiler has _Float128 type defined but no working f128 suffix in the
> headers.
[Blower, Melanie] Thanks for opening this request.  Perhaps we need to pull out this patch and only put it back in when all the necessary builtin's and f128 literal suffix is available.
> 
> 
> Repository:
>   rC Clang
> 
> https://reviews.llvm.org/D40673
> 
>