On 20.04.2010, at 23:04, Marcus Meissner wrote:

(forwarding for Peter, as he is not subscribed here).

Any comments?

Ciao, Marcus

From: Petr Baudis pasky@suse.cz Date: 20. April 2010 17:55:39 MESZ To: opensuse-ppc@opensuse.org Cc: lchiquitto@novell.com, meissner@novell.com Subject: Re: [Bug 596271] glibc 2.11 being built without support to "old" powerpc32 processors (G4)

On Tue, Apr 20, 2010 at 02:23:57PM +0000, Bugzilla_NoReply Bugzilla_NoReply wrote:

...

http://bugzilla.novell.com/show_bug.cgi?id=596271

http://bugzilla.novell.com/show_bug.cgi?id=596271#c3

--- Comment #3 from Leonardo Chiquitto lchiquitto@novell.com 2010-04-20 14:23:56 UTC --- I "fixed" it here by disabling optimization completely on ppc32:

%define enable_stackguard_randomization 1 -%ifarch ppc ppc64 +%ifarch ppc64 %define optimize_power 1

Do you think this is acceptable for openSUSE? I don't want to propose a change that will cause performance degradation for the majority of users (assuming that most openSUSE ppc users have IBM hardware and not Apple) and benefit only myself :)

I would like to get opinion of other ppc users if there are any. We can either disable -mcpu=power4 which will make it work on G4 as well but have non-trivial performance impact (I don't have any figures), or decide G4 is unsupported. There are also compromises like having /lib/power4/libc.so that should be easy to do with our glibc.spec, but will require extra building time and I don't have the time to implement this myself.

If there will be no clear feedback, I will drop -mcpu=power4.

The G4 is the most recent 32 bit PowerPC available. It's called e600 now, but basically the same technology from back then.

For ppc64 I'd actually think it'd make sense to move ahead with ppc64 userland as well. So making POWER4 and above fast there just doesn't make any sense.

IOW yes, please disable -mcpu=power4 for ppc(32).

As far as the /lib/power4 directory goes - that's exactly what 11.1 does for me:

lychee:~/:[0]# l /lib/power4/ total 2500 drwxr-xr-x 2 root root 4096 Feb 17 2009 ./ drwxr-xr-x 23 root root 12288 Jan 16 14:20 ../ -rwxr-xr-x 2 root root 1583356 Jan 22 2009 libc-2.9.so* lrwxrwxrwx 1 root root 11 Feb 17 2009 libc.so.6 -> libc-2.9.so* -rwxr-xr-x 1 root root 731660 Jan 22 2009 libm-2.9.so* lrwxrwxrwx 1 root root 11 Feb 17 2009 libm.so.6 -> libm-2.9.so* -rwxr-xr-x 2 root root 133332 Jan 22 2009 libpthread-2.9.so* lrwxrwxrwx 1 root root 17 Feb 17 2009 libpthread.so.0 -> libpthread-2.9.so* -rwxr-xr-x 2 root root 39128 Jan 22 2009 librt-2.9.so* lrwxrwxrwx 1 root root 12 Feb 17 2009 librt.so.1 -> librt-2.9.so* -rwxr-xr-x 1 root root 34848 Jan 22 2009 libthread_db-1.0.so* lrwxrwxrwx 1 root root 19 Feb 17 2009 libthread_db.so.1 -> libthread_db-1.0.so* lychee:~/:[0]# rpm -qf /lib/power4/libc-2.9.so glibc-2.9-2.10.1

Alex