[Bug nptl/15921] New: nptl/tst-cleanup2 fails on s390x and power6

["siddhesh at redhat dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=15921

            Bug ID: 15921
           Summary: nptl/tst-cleanup2 fails on s390x and power6
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: nptl
          Assignee: siddhesh at redhat dot com
          Reporter: siddhesh at redhat dot com
                CC: drepper.fsp at gmail dot com

The test case nptl/tst-cleanup2 fails on s390x and power6 due to instruction
sheduling in gcc.  This was reported in gcc:

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58034

but it was concluded that gcc is allowed to assume that the first argument to
sprintf is a character array - NULL not being a character array.

It is trivial to avoid this problem in the test case by marking the success
return value in tst-cleanup2 as volatile.

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