Extern or forward variable declaration tools/perf/arch/arm/include/arch-tests.h, line 7 [usage...] tools/perf/arch/arm64/include/arch-tests.h, line 7 [usage...] tools/perf/arch/powerpc/include/arch-tests.h, line 7 [usage...] tools/perf/arch/x86/include/arch-tests.h, line 15 [usage...] tools/perf/tests/tests.h, line 113 [usage...] tools/perf/util/db-export.h, line 27 [usage...] tools/perf/util/evsel.h, line 285 [usage...] tools/perf/util/machine.h, line 15 [usage...] tools/perf/util/ordered-events.h, line 7 [usage...] tools/perf/util/thread-stack.h, line 29 [usage...] tools/perf/util/tool.h, line 13 [usage...] tools/perf/util/trace-event.h, line 9 [usage...] tools/perf/util/unwind-libdw.h, line 9 [usage...] tools/perf/util/unwind.h, line 9 [usage...] Structure tools/perf/util/event.h, line 191 [usage...]