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perf report: Fix no libunwind compiled warning break s390 issue

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Commit 800d3f5616 ("perf report: Add warning when libunwind not
compiled in") breaks the s390 platform. S390 uses libdw-dwarf-unwind for
call chain unwinding and had no support for libunwind.

So the warning "Please install libunwind development packages during the
perf build." caused the confusion even if the call-graph is displayed
correctly.

This patch adds checking for HAVE_DWARF_SUPPORT, which is set when
libdw-dwarf-unwind is compiled in.

Fixes: 800d3f5616 ("perf report: Add warning when libunwind not compiled in")
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Reviewed-by: Thomas Richter <tmricht@linux.ibm.com>
Tested-by: Thomas Richter <tmricht@linux.ibm.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jin Yao <yao.jin@intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20200107191745.18415-1-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jin Yao 2020-01-08 03:17:45 +08:00 committed by Arnaldo Carvalho de Melo
parent 3b0b16bf8c
commit c3314a74f8
1 changed files with 3 additions and 3 deletions
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6
tools/perf/builtin-report.c
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@ -412,10 +412,10 @@ static int report__setup_sample_type(struct report *rep)
PERF_SAMPLE_BRANCH_ANY))
rep->nonany_branch_mode = true;
#ifndef HAVE_LIBUNWIND_SUPPORT
#if !defined(HAVE_LIBUNWIND_SUPPORT) && !defined(HAVE_DWARF_SUPPORT)
if (dwarf_callchain_users) {
ui__warning("Please install libunwind development packages "
"during the perf build.\n");
ui__warning("Please install libunwind or libdw "
"development packages during the perf build.\n");
}
#endif