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Posted Oct 11, 2009 22:56 UTC (Sun) by jch (guest, #51929)
As far as I know, they don't.
There was some interest in adding that in the early AMD64 days, but as it turned out that it is quite possible to have a pure 64-bit userspace, interest slowly faded.
Right now, 64-bit Debian distributions are mostly purely 64-bit, with the few 32-bit packages present encoding their 32-bitness into their name (e.g. libc6-i386). It's not pretty, but it works fine in practice.
Posted Oct 12, 2009 7:31 UTC (Mon) by niner (subscriber, #26151)
Posted Oct 12, 2009 11:14 UTC (Mon) by nye (guest, #51576)
A bigger problem is that trying to run 32-bit binaries with non-trivial library dependencies on Debian is an exercise in pain. Debian's 32-bit support is *really bad*. Most libraries don't have 32-bit versions available, and those that do are just the binaries rammed into a couple of huge ia32- mega-packages.
There are proposals and frequent discussions about multilib, but no visible progress (unless you count major breakage for a month or so earlier this year), and it's one of those subjects which is practically guaranteed to start a flamewar if mentioned on debian-devel.
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