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32bit development on x86-64
by Roger K. Wells 11 Nov '09

11 Nov '09

We develop software and are beginning a slow transition from 32 bit applications to their 64 bit equivalents. During this period it will be necessary to build programs targeted for both environments using the x86-64 machines for development. here is a simple/small "application", sizes.c: #include <stdio.h> #include <stdlib.h> int main(int argc, char **argv) { printf("Various sizes:\n"); printf(" short = %d\n", sizeof(short)); printf(" int = %d\n", sizeof(int)); printf(" long = %d\n", sizeof(long)); printf(" float = %d\n", sizeof(float)); printf(" double = %d\n", sizeof(double)); return 0; } if I build it using: gcc -m32 -Wall -osizes sizes.c there are no warnings or complaints and a functioning 32 bit program runs, giving the size of a long as 4 bytes. (Of course without the m32 flag the size of long is 8 bytes.) if I try to do the equivalent in two steps: gcc -c -m32 -Wall sizes.c gcc -osizes -Wl,-m,elf_i386 sizes.o the result is: /usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-redhat-linux/4.1.2/libgcc.a when searching for -lgcc /usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-redhat-linux/4.1.2/libgcc.a when searching for -lgcc /usr/bin/ld: cannot find -lgcc collect2: ld returned 1 exit status there is some confusion in the man pages as to whether the correct 32 bit emulation is elf_i386 or i386linux so: gcc -osizes -Wl,-m,i386linux sizes.o gives result: /usr/bin/ld: unrecognized option '--eh-frame-hdr' /usr/bin/ld: use the --help option for usage information collect2: ld returned 1 exit status since the single line command works it seems that there must be a way to get the job done. This becomes important when there are many source files and use of a traditional makefile is involved where compiling and linking are separate steps. Thanks in advance for reading this, roger wells -- Roger Wells, P.E. SAIC 221 Third St Newport, RI 02840 401-847-4210 (voice) 401-849-1585 (fax) roger.k.wells(a)saic.com

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CentOS-announce Digest, Vol 57, Issue 6
by centos-announce-request＠centos.org 11 Nov '09

11 Nov '09

Send CentOS-announce mailing list submissions to centos-announce(a)centos.org To subscribe or unsubscribe via the World Wide Web, visit http://lists.centos.org/mailman/listinfo/centos-announce or, via email, send a message with subject or body 'help' to centos-announce-request(a)centos.org You can reach the person managing the list at centos-announce-owner(a)centos.org When replying, please edit your Subject line so it is more specific than "Re: Contents of CentOS-announce digest..." Today's Topics: 1. CESA-2009:1572 Moderate CentOS 3 i386 4Suite - security update (Tru Huynh) 2. CESA-2009:1572 Moderate CentOS 3 x86_64 4Suite - security update (Tru Huynh) 3. CESA-2009:1572 Moderate CentOS 4 i386 4Suite - security update (Tru Huynh) 4. CESA-2009:1572 Moderate CentOS 4 x86_64 4Suite - security update (Tru Huynh) ---------------------------------------------------------------------- Message: 1 Date: Tue, 10 Nov 2009 22:28:54 +0100 From: Tru Huynh <tru(a)centos.org> Subject: [CentOS-announce] CESA-2009:1572 Moderate CentOS 3 i386 4Suite - security update To: centos-announce(a)centos.org Message-ID: <20091110212854.GA1352(a)sillage.bis.pasteur.fr> Content-Type: text/plain; charset="us-ascii" CentOS Errata and Security Advisory CESA-2009:1572 4Suite security update for CentOS 3 i386: https://rhn.redhat.com/errata/RHSA-2009-1572.html The following updated file has been uploaded and is currently syncing to the mirrors: i386: updates/i386/RPMS/4Suite-0.11.1-15.i386.rpm source: updates/SRPMS/4Suite-0.11.1-15.src.rpm You may update your CentOS-3 i386 installations by running the command: yum update 4Suite Tru -- Tru Huynh (mirrors, CentOS-3 i386/x86_64 Package Maintenance) http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xBEFA581B

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Lost raid when server reboots
by carlopmart 11 Nov '09

11 Nov '09

Hi all, I have setup a raid1 between two iscsi disks and mdadm command goes well. Problems starts when i rebooted the server (CentOS 5.4 fully updated): raid is lost, and i don't understand why. "mdadm --detail --scan" doesn't returns me any output. "mdadm --examine --scan" returns me: ARRAY /dev/md0 level=raid1 num-devices=2 UUID=9295e5a2:b28d4fbd:b61fed29:f232ebfe and it's ok. My mdadm.conf is: DEVICE partitions ARRAY /dev/md0 level=raid1 num-devices=2 metadata=0.90 UUID=9295e5a2:b28d4fbd:b61fed29:f232ebfe devices=/dev/iopsda1,/dev/iopsdb1 MAILADDR root mdmonitor init script is activated. Why md0 is not activated when I reboot this server? How can I do this persistent between reboots?? Many thanks. -- CL Martinez carlopmart {at} gmail {d0t} com

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screwed up dependencies
by ken 11 Nov '09

11 Nov '09

Subsequent to trying to "yum update"-- it failed--, I tried to resolve the dependencies piecemeal: # yum update faad2 .... --> Processing Dependency: libfaad.so.0 for package: ffmpeg ---> Package faad2.i386 0:2.7-1.el5.rf set to be updated --> Finished Dependency Resolution ffmpeg-0.5-2.el5.rf.i386 from installed has depsolving problems --> Missing Dependency: libfaad.so.0 is needed by package ffmpeg-0.5-2.el5.rf.i386 (installed) Error: Missing Dependency: libfaad.so.0 is needed by package ffmpeg-0.5-2.el5.rf.i386 (installed) .... # rpm -q ffmpeg ffmpeg-0.5-2.el5.rf Could it be that there's a packaging error in faad2 ? -- War is a failure of the imagination. --William Blake

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About the tar extract signal directory~~
by Majian 11 Nov '09

11 Nov '09

Hi,all: I've couple of large tarballs such as www.tar and images.tar. Is it possible to extract a single file or a list of files from a large tarball such as images.tar instead of extracting the entire tarball? How do I extract specific files under Linux / UNIX operating systems? Thanks in advance ~~

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Berlin Beer event.
by Geerd-Dietger Hoffmann 11 Nov '09

11 Nov '09

Hey After the London Beer event seams to become a regular thing I was wondering who in Berlin would want to participate in such a thing. I am visiting for BLIT [1] on the 21. November to promote CentOS and was wondering how many people would participate? It is always good to meet fellow Linux / CentOS users and exchange experiences and knowledge. Hope some people will get together. Cheers Didi [1] http://www.blit.org/2009/ ---- My www page: www.ribalba.de Email / Jabber: ribalba(a)gmail.com Skype : ribalba

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Audio issue(s)
by MHR 11 Nov '09

11 Nov '09

I just bought a new (refurbished) Everexe StepNote laptop with a VIA C7-M CPU and a VIA chipset, installed CentOS 5.4 on it and the audio is not working. I looked around for a sound driver for the VIA vt1708/a, which is what it claims to have (see below), but that didn't work either. Any pointers as to what I'm missing? !lpspci 04:01.0 Audio device: VIA Technologies, Inc. VT1708/A [Azalia HDAC] (VIA High Definition Audio Controller) (rev 10) !lsmod | grep snd snd_seq_dummy 7877 0 snd_seq_oss 32577 0 snd_seq_midi_event 11073 1 snd_seq_oss snd_seq 49585 5 snd_seq_dummy,snd_seq_oss,snd_seq_midi_event snd_seq_device 11725 3 snd_seq_dummy,snd_seq_oss,snd_seq snd_pcm_oss 42817 0 snd_mixer_oss 19009 1 snd_pcm_oss snd_pcm 72133 1 snd_pcm_oss snd_timer 24517 2 snd_seq,snd_pcm snd_page_alloc 14281 1 snd_pcm snd_hwdep 12869 0 snd 55749 8 snd_seq_oss,snd_seq,snd_seq_device,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_timer,snd_hwdep soundcore 11553 1 snd Thanks. mhr

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Build a LiveCD?
by Niki Kovacs 11 Nov '09

11 Nov '09

Hi, I have a highly customized desktop built from CentOS 5.4 and RPMForge repos (plus some stuff of my own). I'd like to build a LiveCD from that, for one very specific reason. I have a medical application (MedinTux) that would be very handy to demonstrate to doctors, hospital staff, etc. with a LiveCD. Any ideas? Niki

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KVM + KSM?
by Lucian ＠ lastdot.org 11 Nov '09

11 Nov '09

Hi guys, Any chance we could get KSM support in centos 5.4? Maybe the centosplus ones or a gift from elrepo.

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problem: iptables -j QUEUE
by Mike -- EMAIL IGNORED 10 Nov '09

10 Nov '09

On my new CentOS 5.4 box I cannot get -j QUEUE to work. I am using the same setup I used on a CentOS 5.2 box. Is there anything new I should know? Thanks, Mike.

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