(amd64) 32bit apps..

ryanCD · n00b Joined: 28 Aug 2003 Posts: 60

I installed the 32bit emulation libraries, and got a 32bit binary (cmucl) I want to work. I'm assuming I have to link the binary to the 32bit libraries, but I don't know how to do that. Just trying to make it work by linking /lib to /emul/linux/x86/lib gave me results, whereby results mean breaking everything.

As things stand, if I just run lisp (the package I'm installing) I get an immediate segmentation fault.

I did a bit of google searching, but I don't really know if I'm on the right track, so, yeah.
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ryanCD · n00b Joined: 28 Aug 2003 Posts: 60

Talking too myself mostly, but I think I'll go for a chroot set up. The packages I want have a whole mess of dependancies which I'd have to figure out, and even then I might not get it to work correctly with my current level of experience. As I imagine, things should be pretty much plug and play when I chroot to the 32bit files, although I would have all sorts of bonus overhead, a second portage tree... Correct me if I'm wrong on any of those assumtions before I get too deep.

In this senario, 32bit and 64bit would be pretty sperate. I couldn't launch a 32bit application in 64bit XFree, correct? I'm looking at 32bit command line tools, but I'm trying to sort out my options.

Anyway, sleep and buy a new hard drive tommorow.
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64bittux · n00b Joined: 06 Feb 2004 Posts: 6

First, stop reading this and instead read Brad's page on running Gentoo64. http://dev.gentoo.org/~brad_mssw/amd64-tech-notes.html

Now that you have read his page you should know what needs to be done. You do NOT need to chroot. You can but it is a waste of space.

ryanCD · n00b Joined: 28 Aug 2003 Posts: 60

I did read brad's page, and have things set up as per the instructions there.

I think my problem is probably with libsigsegv, which, on reflection and after some sleep, I installed as a 64bit library. I'm going to try and install that as a 32bit library, then see if lisp will run correctly.

My bigger issue is that I don't know how to check for what run time libraries a program needs, and I don't know how to change the runtime libraries a program uses when there is more than one version availible (ie 32 and 64bit). I read through the ld man pages, but I don't really think that's what I need, or maby I still don't understand how to use it.

I may still end up with a 32 bit partion I can chroot too. This would basically give me a pation where I can emerge and install all 32bit stuff, so I wouldn't even worry that the wrong libraries are being linked too, or anything like that. It would just make my thinking cleaner at the expense of hard drive space.
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borh · Posted: Fri Feb 06, 2004 4:18 pm Post subject:

Another option is to compile whatever package you want as a static binary on a 32-bit computer. For example, you could edit the ebuild of whatever package you want and add "--enable-static" to the configure process (I think that's the most common flag for static). Then emerge with "emerge -b [package name]". You can then use the binary tbz2 on your amd64 system with a "emerge -k [package name]". This is only usefull if you have a second 32-bit gentoo system on hand, though.

Kioshen · Posted: Fri Feb 06, 2004 6:02 pm Post subject:

That's a pretty good tip. I hope they will make a dedicated section for us so we can make the "Power tip of the day" thread

ryanCD · n00b Joined: 28 Aug 2003 Posts: 60

I discovered the linux32/linux64 commands, and that does what I want, ie "linux32 lisp" runs without seg faulting, so hurray.
peace, out.
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