[Bug gcov-profile/77466] New: [7 regression] FAIL: g++.dg/gcov/gcov-dump-1.C -std=gnu++11 (test for excess errors)

[schwab@linux-m68k.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77466

            Bug ID: 77466
           Summary: [7 regression] FAIL: g++.dg/gcov/gcov-dump-1.C
                    -std=gnu++11 (test for excess errors)
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: gcov-profile
          Assignee: unassigned at gcc dot gnu.org
          Reporter: schwab@linux-m68k.org
                CC: marxin at gcc dot gnu.org
            Blocks: 58306
  Target Milestone: ---

$ gcc/xg++ -Bgcc/ ../gcc/testsuite/g++.dg/gcov/gcov-dump-1.C -m32 -nostdinc++
-Ipowerpc64-suse-linux/32/libstdc++-v3/include/powerpc64-suse-linux
-Ipowerpc64-suse-linux/32/libstdc++-v3/include -I../libstdc++-v3/libsupc++
-I../libstdc++-v3/include/backward -I../libstdc++-v3/testsuite/util
-std=gnu++98 -fprofile-generate -ftest-coverage -lgcov
-Lpowerpc64-suse-linux/32/libstdc++-v3/src/.libs
-Bpowerpc64-suse-linux/32/libstdc++-v3/src/.libs
-Lpowerpc64-suse-linux/32/libstdc++-v3/src/.libs
-Bpowerpc64-suse-linux/32/libitm/ -Lpowerpc64-suse-linux/32/libitm/.libs -lm -o
./gcov-dump-1.exegcc/32/libgcov.a(_gcov_time_profiler.o): In function
`__gcov_time_profiler_atomic':
/daten/gcc/gcc-20160902/Build/powerpc64-suse-linux/32/libgcc/../../../../libgcc/libgcov-profiler.c:352:
undefined reference to `__atomic_fetch_add_8'
collect2: error: ld returned 1 exit status


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58306
[Bug 58306] Broken profiling for unrar sources: error: corrupted value profile:
value profile counter (X out of Y) inconsistent with basic-block count