[PATCHv3] powerpc: ABI change - add HWCAP/HWCAP2/platform info to TCB

[Joseph Myers]

On Wed, 23 Sep 2015, Carlos Eduardo Seo wrote:

> O’Donell suggested we used a versioned symbol to track this change, so 
> it doesn’t 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