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Re: [PATCHv3] powerpc: ABI change - add HWCAP/HWCAP2/platform info to TCB
- From: Peter Bergner <bergner at vnet dot ibm dot com>
- To: Joseph Myers <joseph at codesourcery dot com>
- Cc: Carlos Eduardo Seo <cseo at linux dot vnet dot ibm dot com>, 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 18:25:31 -0500
- 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> <alpine dot DEB dot 2 dot 10 dot 1509232141250 dot 10585 at digraph dot polyomino dot org dot uk> <1443046986 dot 23503 dot 68 dot camel at otta> <alpine dot DEB dot 2 dot 10 dot 1509232234500 dot 10585 at digraph dot polyomino dot org dot uk>
On Wed, 2015-09-23 at 22:36 +0000, Joseph Myers wrote:
> On Wed, 23 Sep 2015, Peter Bergner wrote:
>> The idea is that applications will use the builtins supplied by GCC
>> (and other compilers) and will not access this info directly.
>> In GCC, my plan is to first add a configure test looking for the
>> symbol and if it doesn't exist, then I'll make the builtins return
>
> (Please make that configure test respect --with-glibc-version so that the
> results can be correct when a bootstrap compiler is configured without
> pre-existing glibc.)
So you want the --with-glibc-version option to take precedence over a
configure time test that the __init_hwcapinfo (or whatever it ends up
being called) exists? Meaning we won't even do the configure time test
if the user explicitly uses the --with-glibc-version option?
Peter