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Re: [PATCHv3] powerpc: ABI change - add HWCAP/HWCAP2/platform info to TCB
- From: Joseph Myers <joseph at codesourcery dot com>
- To: Carlos Eduardo Seo <cseo at linux dot vnet dot ibm dot com>
- Cc: GNU C Library <libc-alpha at sourceware dot org>, Tulio Machado <tuliom at linux dot vnet dot ibm dot com>, "Steven J. Munroe" <sjmunroe at us dot ibm dot com>, Carlos O'Donell <carlos at redhat dot com>
- Date: Wed, 23 Sep 2015 21:43:21 +0000
- Subject: Re: [PATCHv3] powerpc: ABI change - add HWCAP/HWCAP2/platform info to TCB
- Authentication-results: sourceware.org; auth=none
- References: <4BE991CB-F601-4D63-A416-5991FE870FC4 at linux dot vnet dot ibm dot com> <alpine dot DEB dot 2 dot 10 dot 1509232114070 dot 10585 at digraph dot polyomino dot org dot uk> <B650304C-6207-46AC-B6A8-FA29959B305D at linux dot vnet dot ibm dot com>
On Wed, 23 Sep 2015, Carlos Eduardo Seo wrote:
> OâDonell suggested we used a versioned symbol to track this change, so
> it doesnât break applications when running against an old glibc:
But I don't see how the symbol, in the form you've added it, achieves
that. How do you ensure that applications using the new feature have an
undefined reference to this symbol? And in any case a symbol that is not
part of the public API, but is exported from shared libraries, needs to be
in the implementation namespace (__*).
--
Joseph S. Myers
joseph@codesourcery.com