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------- Comment From emachado@xxxxxxxxxx 2014-09-05 16:42 EDT-------
I reran gdb-7.8 testsuite on Ubuntu 14.10 using gcc-4.8 and the results seemed better:

=== gdb Summary ===

# of expected passes            25103
# of unexpected failures        190
# of unexpected successes       2
# of expected failures          66
# of unknown successes          1
# of known failures             59
# of unresolved testcases       3
# of untested testcases         18
# of unsupported tests          100

For comparison reasons, this is gdb-7.7 testsuite from Ubuntu 14.04
results on Ubuntu 14.10 with gcc-4.8:

=== gdb Summary ===

# of expected passes            22321
# of unexpected failures        155
# of unexpected successes       2
# of expected failures          65
# of unknown successes          1
# of known failures             59
# of unresolved testcases       6
# of untested testcases         20
# of unsupported tests          67

In this case, the difference of unexpected failures between them are due
to new testcases (mostly gdb.base/break-idempotent.exp and gdb.python
/py-xmethods.exp).

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https://bugs.launchpad.net/bugs/1365664

Title:
  gdb source test suites are failing in Ubuntu14.10

Status in “gdb” package in Ubuntu:
  Confirmed

Bug description:
  ---Problem Description---
  gdb source test suites are failing in Ubuntu14.10
   
  Machine Type = P8 
   
  ---Steps to Reproduce---
  Install a P8 system with Power KVM and then install Ubuntu 14.10 guest.
  Then try to build and execute the gdb source test suites as below.

  root@ubuntu:~# apt-get source gdb
  root@ubuntu:~# cd gdb-7.8/
  root@ubuntu:~/gdb-7.8# dpkg-buildpackage -b 2>&1 | tee gdblog

                  === gdb Summary ===

  # of expected passes            25009
  # of unexpected failures        287
  # of unexpected successes       2
  # of expected failures          66
  # of unknown successes          1
  # of known failures             59
  # of unresolved testcases       3
  # of untested testcases         19
  # of unsupported tests          100

   
  ---uname output---
  Linux ubuntu 3.16.0-11-generic #16-Ubuntu SMP Mon Aug 25 20:02:00 UTC 2014 ppc64le ppc64le ppc64le GNU/Linux
   
  I've retested gdb from Ubuntu 14.04 (gdb-7.7-0ubuntu3.1) in the Ubuntu 14.10 VM provided by Pavaman and the number of failures curiously increased to 250 (in comparison to less than 140 on 14.04), which leads me to believe that there is something in the environment of Ubuntu 14.10 compromising gdb functionality in several testcases.

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