Things from my past coming back to haunt me, but if people want to
keep ccing me...
On Sat, Jul 20, 2013 at 10:15:25PM +0200, Michael Kerrisk wrote:
> Yes. I've never been quite sure though whether the particular
> kernel versions to specify for LD_ASSUME_KERNEL when
> selecting the threading implementation are distro-specific,
> so I'm reluctant to go into the detail in the page.
> As you note, I do hint at the 2.2.5 version in the pthreads(7):
asuffield@cyclone:~$ readelf -n /lib/x86_64-linux-gnu/libc.so.6
Notes at offset 0x00000270 with length 0x00000024:
Owner Data size Description
GNU 0x00000014 NT_GNU_BUILD_ID (unique build ID
bitstring)
Build ID: cddff8f45f5aa7b5ce64717e9e6ae3899f27972c
Notes at offset 0x00000294 with length 0x00000020:
Owner Data size Description
GNU 0x00000010 NT_GNU_ABI_TAG (ABI version tag)
OS: Linux, ABI: 2.6.26
asuffield@cyclone:~$ LD_ASSUME_KERNEL=2.6.25 /bin/true
/bin/true: error while loading shared libraries: libc.so.6: cannot open shared
object file: No such file or directory
asuffield@cyclone:~$ LD_ASSUME_KERNEL=2.6.26 /bin/true
asuffield@cyclone:~$
Apparently glibc has moved on and there's nothing in wheezy that can
use the old numbers. I expect other distros are similar. This
information is probably only of historical interest now.
The number 2.2.5 used to be special because it was the *minimum*
version supported by the non-TLS libc that was shipped at the time.
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