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From: Szabolcs Nagy <nsz@port70.net>
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Subject: Re: [PATCH v2] add powerpc64 port
Date: Thu, 14 Apr 2016 02:58:09 +0200
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* Rich Felker <dalias@libc.org> [2016-04-13 19:13:59 -0400]:
> On Thu, Apr 14, 2016 at 01:05:07AM +0200, Szabolcs Nagy wrote:
> > this reminds me that ppc(64) now has a tls optimization
> > if the module is tagged with DT_PPC(64)_OPT, we don't
> > need to implement it yet, but eventually elf.h should
> > be updated.
> 
> Details?
> 

http://www.sourceware.org/ml/libc-alpha/2015-03/msg00580.html
http://sourceware.org/git/?p=glibc.git;a=commit;h=afcd9480feca651eef436d8438b783dde5c3bbb2

elf.h is missing new macros added in the last 2 years or so,
like DT_PCC_OPT. i assumed the tls optimization is backward
compatible so it's not critical.