https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78069

            Bug ID: 78069
           Summary: [7 Regression] -fprofile-update=atomic warning
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Keywords: diagnostic
          Severity: normal
          Priority: P3
         Component: regression
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dje at gcc dot gnu.org
                CC: marxin at gcc dot gnu.org
  Target Milestone: ---
            Target: powerpc-ibm-aix*

GCC now warns for -fprofile-update=atomic + -pthread on targets where atomic
update of profile variables is not supported -- 64 bit gcov counter in 32 bit
mode / target.  This creates a huge amount of noise from unnecessary warnings
and failures on profiling tests in the testsuite.

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