[Bug 817187] [NEW] change in readlink() errno in 2.6.39 and later kernels causes FTBFS for packages with older gnulib

[Jamie Strandboge]

Public bug reported:

This is due to the following:
http://lists.gnu.org/archive/html/bug-gnulib/2011-03/msg00308.html

"coreutils' "make check" failed on rawhide due to a kernel change
in how readlink and readlinkat treat the empty file name.
Before, they'd fail with ENOENT.  Now, it's EINVAL."

This will affect more than libvirt, (see Debian http://bugs.debian.org
/cgi-bin/bugreport.cgi?bug=630902) but the patch in the above bug can be
applied to gnulib/tests/test-areadlink.h to get these building again on
newer releases. This is SRU-worthy, as libvirt will not build once the
buildds are running newer kernels.

** Affects: libvirt (Ubuntu)
     Importance: Undecided
         Status: Invalid

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Confirmed

** Affects: libvirt (Ubuntu Lucid)
     Importance: High
         Status: Triaged

** Affects: linux (Ubuntu Lucid)
     Importance: Undecided
         Status: Invalid

** Affects: libvirt (Ubuntu Maverick)
     Importance: High
         Status: Triaged

** Affects: linux (Ubuntu Maverick)
     Importance: Undecided
         Status: Invalid

** Affects: libvirt (Ubuntu Natty)
     Importance: High
         Status: Triaged

** Affects: linux (Ubuntu Natty)
     Importance: Undecided
         Status: Invalid

** Affects: libvirt (Ubuntu Oneiric)
     Importance: Undecided
         Status: Invalid

** Affects: linux (Ubuntu Oneiric)
     Importance: Undecided
         Status: Confirmed

** Affects: libvirt (Ubuntu Hardy)
     Importance: High
         Status: Triaged

** Affects: linux (Ubuntu Hardy)
     Importance: Undecided
         Status: Invalid

** Affects: m4 (Debian)
     Importance: Unknown
         Status: Unknown

** Also affects: libvirt (Ubuntu Hardy)
   Importance: Undecided
       Status: New

** Also affects: libvirt (Ubuntu Lucid)
   Importance: Undecided
       Status: New

** Also affects: libvirt (Ubuntu Natty)
   Importance: Undecided
       Status: New

** Also affects: libvirt (Ubuntu Maverick)
   Importance: Undecided
       Status: New

** Also affects: libvirt (Ubuntu Oneiric)
   Importance: Undecided
       Status: New

** Changed in: libvirt (Ubuntu Oneiric)
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/817187

Title:
  change in readlink() errno in 2.6.39 and later kernels causes FTBFS
  for packages with older gnulib

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