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I have a customized version of Eclipse which is for 32-bit only. And I've got to run it on 64-bit ubuntu 12.04 LTS. It is not possible to download a standard 64-bit Eclipse or to run a 32-bit VM. Are there any simple and reliable ways of doing this? Chroot or ia32-libs seem to be not the best option due to reliability / practicality reasons.

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migrated from Jan 24 '13 at 19:58

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Why do you think a 32-bit version of Eclipse can't run on a 64-bit OS? Also, why do you think a 32-bit build would be less reliable or less practical than the 64-bit build of the very same code base? – H2CO3 Jan 24 '13 at 17:44
@H2CO3 There are other reasons than reliability. I for one am forced to use a 32 bit native windows .dll for one application and that requires a 32 bit java. – Chris Nava Jan 24 '13 at 21:04

The easiest would be the installation of 32bit libs.

sudo dpkg --add-architecture i386

sudo apt-get install ia32-libs

then reboot

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There are 4 suggestions on that page:

Installation of 32-bit compatibility libraries (ia32-libs or Multiarch support)

A 32-bit chroot

Full virtualization through KVM or VirtualBox

Another option in a pinch is getlibs getlibs 
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I found an old post (2007) which might help you:

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