linux-kernel - [PATCH] perf dwarf-aux: Fix build with !HAVE_DWARF_GETLOCATIONS

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Message-Id: <20241001123625.1063153-1-james.clark@linaro.org>
Date: Tue,  1 Oct 2024 13:36:25 +0100
From: James Clark <james.clark@...aro.org>
To: linux-perf-users@...r.kernel.org,
	acme@...nel.org,
	namhyung@...nel.org
Cc: James Clark <james.clark@...aro.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Mark Rutland <mark.rutland@....com>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Jiri Olsa <jolsa@...nel.org>,
	Ian Rogers <irogers@...gle.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	"Liang, Kan" <kan.liang@...ux.intel.com>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	Athira Rajeev <atrajeev@...ux.vnet.ibm.com>,
	Kajol Jain <kjain@...ux.ibm.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH] perf dwarf-aux: Fix build with !HAVE_DWARF_GETLOCATIONS_SUPPORT

The linked fixes commit added an #include "dwarf-aux.h" to disasm.h
which gets picked up in a lot of places. Without
HAVE_DWARF_GETLOCATIONS_SUPPORT the stubs return an errno, so include
errno.h to fix the following build error:

  In file included from util/disasm.h:8,
                 from util/annotate.h:16,
                 from builtin-top.c:23:
  util/dwarf-aux.h: In function 'die_get_var_range':
  util/dwarf-aux.h:183:10: error: 'ENOTSUP' undeclared (first use in this function)
    183 |  return -ENOTSUP;
        |          ^~~~~~~

Fixes: 782959ac248a ("perf annotate: Add "update_insn_state" callback function to handle arch specific instruction tracking")
Signed-off-by: James Clark <james.clark@...aro.org>
---
 tools/perf/util/dwarf-aux.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/perf/util/dwarf-aux.h b/tools/perf/util/dwarf-aux.h
index 336a3a183a78..bd7505812569 100644
--- a/tools/perf/util/dwarf-aux.h
+++ b/tools/perf/util/dwarf-aux.h
@@ -9,6 +9,7 @@
 #include <elfutils/libdw.h>
 #include <elfutils/libdwfl.h>
 #include <elfutils/version.h>
+#include <errno.h>
 
 struct strbuf;
 
-- 
2.34.1