Re: [gentoo-user] how to rebuild gentoo on a somewhat different hardware
Apparently, though unproven, at 12:06 on Tuesday 16 November 2010, Helmut Jarausch did opine thusly: On 11/16/10 10:56:29, Alan McKinnon wrote: Backup your portage related data and re-install. Seriously - you know you are looking at doing emerge -e world and will need to fiddle stuff to make it complete successfully. If you just reinstall, put your old world file and /etc/portage/ back then let portage have at it, that is exactly what will happen. You'll have 30-45 minutes of setup work and a high level of confidence it will complete successfully. Trying to fix the existing installation is potentially many hours of poking around to see what changed, potentially several goes at running emerge -e world, hair pulling, and you will probably give up and just reinstall anyway. I'm assuming you are looking for the easiest, fastest route to success with the least pain, and that your days of poking into portage to see how things work for fun are long over. Thanks Alan, just one more question: where are information like the current eselect(ions) stored? I've never found a place where eselect stores it's info. I suspect it directly reads all the various symlinks off disk when it starts up. If so, this will cause you some extra manual work. -- alan dot mckinnon at gmail dot com
Re: [gentoo-user] how to rebuild gentoo on a somewhat different hardware
On 11/17/10 00:01:15, Adam Carter wrote: I have an up-to-date ~amd64 GenToo installation with has been built on a current AMD64 (Phenom II) machine where I used -mtune=native in etc/make.conf since I didn't think of the case that I would need to port this system to a somewhat older Opteron based machine (still AMD64) But after cloning the system, some fundamental utilities die of an illegal instruction. Did you have -march set? If so, what to? If -march is unset, then AFAIK your binaries should run on any amd64 machine. If you have it set to native, then your binaries will only run on equal or greater hardware than what it was built on. Thanks Alan. I knew that, but then I inherited an somewhat older Opteron machine and I wasn't aware that this one had a different instruction set then current Opterons. Helmut. -- Helmut Jarausch Lehrstuhl fuer Numerische Mathematik RWTH - Aachen University D 52056 Aachen, Germany
[gentoo-user] how to rebuild gentoo on a somewhat different hardware
Hi, I have an up-to-date ~amd64 GenToo installation with has been built on a current AMD64 (Phenom II) machine where I used -mtune=native in etc/make.conf since I didn't think of the case that I would need to port this system to a somewhat older Opteron based machine (still AMD64) But after cloning the system, some fundamental utilities die of an illegal instruction. So I have to rebuild GenToo nearly from scratch. emerge -e world doesn't work. So, what is a reasonably fast method? I'd like to keep /etc /usr/portage except /usr/portage/packages /var/lib/portage Is there a fast method e.g. by using the Gentoo based SystemRescueCD to reinstall a very basic system, such that I can do emerge -e world. It looks as if the gcc tool-chain is intact since I could compile a kernel without any problem. But some utilities, e.g. find, die of an illegal instruction. Many thanks for any hints saving me a couple of hours work, Helmut.
Re: [gentoo-user] how to rebuild gentoo on a somewhat different hardware
On Tuesday 16 November 2010 10:33:34 Helmut Jarausch wrote: Hi, I have an up-to-date ~amd64 GenToo installation with has been built on a current AMD64 (Phenom II) machine where I used -mtune=native in etc/make.conf since I didn't think of the case that I would need to port this system to a somewhat older Opteron based machine (still AMD64) But after cloning the system, some fundamental utilities die of an illegal instruction. So I have to rebuild GenToo nearly from scratch. emerge -e world doesn't work. So, what is a reasonably fast method? I'd like to keep /etc /usr/portage except /usr/portage/packages /var/lib/portage Is there a fast method e.g. by using the Gentoo based SystemRescueCD to reinstall a very basic system, such that I can do emerge -e world. It looks as if the gcc tool-chain is intact since I could compile a kernel without any problem. But some utilities, e.g. find, die of an illegal instruction. Many thanks for any hints saving me a couple of hours work, Helmut. Ok, the following is NOT tested, but might work: 1) boot with a systemrescuecd 2) backup the sytem (I did not test this) 3) create a chroot-space for a new install (don't worry, not doing full install) 4) unpack a stage3 5) chroot into this 6) build packages from this stage3 7) chroot into the install to be fixed 8) emerge these packages onto your current system (this should contain all you need for system) 9) emerge -e world If there is anyone who has actually been in this situation, please feel free to comment on this. Also, I'm not certain what will happen to /etc, but the etc-update script can be told to keep existing configurations. -- Joost
Re: [gentoo-user] how to rebuild gentoo on a somewhat different hardware
Apparently, though unproven, at 11:33 on Tuesday 16 November 2010, Helmut Jarausch did opine thusly: Hi, I have an up-to-date ~amd64 GenToo installation with has been built on a current AMD64 (Phenom II) machine where I used -mtune=native in etc/make.conf since I didn't think of the case that I would need to port this system to a somewhat older Opteron based machine (still AMD64) But after cloning the system, some fundamental utilities die of an illegal instruction. So I have to rebuild GenToo nearly from scratch. emerge -e world doesn't work. So, what is a reasonably fast method? Backup your portage related data and re-install. Seriously - you know you are looking at doing emerge -e world and will need to fiddle stuff to make it complete successfully. If you just reinstall, put your old world file and /etc/portage/ back then let portage have at it, that is exactly what will happen. You'll have 30-45 minutes of setup work and a high level of confidence it will complete successfully. Trying to fix the existing installation is potentially many hours of poking around to see what changed, potentially several goes at running emerge -e world, hair pulling, and you will probably give up and just reinstall anyway. I'm assuming you are looking for the easiest, fastest route to success with the least pain, and that your days of poking into portage to see how things work for fun are long over. I'd like to keep /etc /usr/portage except /usr/portage/packages /var/lib/portage Is there a fast method e.g. by using the Gentoo based SystemRescueCD to reinstall a very basic system, such that I can do emerge -e world. It looks as if the gcc tool-chain is intact since I could compile a kernel without any problem. But some utilities, e.g. find, die of an illegal instruction. Many thanks for any hints saving me a couple of hours work, Helmut. -- alan dot mckinnon at gmail dot com
Re: [gentoo-user] how to rebuild gentoo on a somewhat different hardware
On 11/16/10 10:56:29, Alan McKinnon wrote: Backup your portage related data and re-install. Seriously - you know you are looking at doing emerge -e world and will need to fiddle stuff to make it complete successfully. If you just reinstall, put your old world file and /etc/portage/ back then let portage have at it, that is exactly what will happen. You'll have 30-45 minutes of setup work and a high level of confidence it will complete successfully. Trying to fix the existing installation is potentially many hours of poking around to see what changed, potentially several goes at running emerge -e world, hair pulling, and you will probably give up and just reinstall anyway. I'm assuming you are looking for the easiest, fastest route to success with the least pain, and that your days of poking into portage to see how things work for fun are long over. Thanks Alan, just one more question: where are information like the current eselect(ions) stored? Helmut.
Re: [gentoo-user] how to rebuild gentoo on a somewhat different hardware
Hello, I think You could try: 1) change cflags in make.conf 2) bootstrap.sh 3) emerge -e system 4) emerge -e world In other words this is how to build a system from stage 1. On Tue, Nov 16, 2010 at 12:06 PM, Helmut Jarausch jarau...@igpm.rwth-aachen.de wrote: On 11/16/10 10:56:29, Alan McKinnon wrote: Backup your portage related data and re-install. Seriously - you know you are looking at doing emerge -e world and will need to fiddle stuff to make it complete successfully. If you just reinstall, put your old world file and /etc/portage/ back then let portage have at it, that is exactly what will happen. You'll have 30-45 minutes of setup work and a high level of confidence it will complete successfully. Trying to fix the existing installation is potentially many hours of poking around to see what changed, potentially several goes at running emerge -e world, hair pulling, and you will probably give up and just reinstall anyway. I'm assuming you are looking for the easiest, fastest route to success with the least pain, and that your days of poking into portage to see how things work for fun are long over. Thanks Alan, just one more question: where are information like the current eselect(ions) stored? Helmut. -- mv
Re: [gentoo-user] how to rebuild gentoo on a somewhat different hardware
I have an up-to-date ~amd64 GenToo installation with has been built on a current AMD64 (Phenom II) machine where I used -mtune=native in etc/make.conf since I didn't think of the case that I would need to port this system to a somewhat older Opteron based machine (still AMD64) But after cloning the system, some fundamental utilities die of an illegal instruction. Did you have -march set? If so, what to? If -march is unset, then AFAIK your binaries should run on any amd64 machine. If you have it set to native, then your binaries will only run on equal or greater hardware than what it was built on.
