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From: Ian Rogers <irogers@google.com>
To: Peter Zijlstra <peterz@infradead.org>,
	Ingo Molnar <mingo@redhat.com>,
	Arnaldo Carvalho de Melo <acme@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
	linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-trace-users@vger.kernel.org,
	Tzvetomir Stoyanov <tz.stoyanov@gmail.com>,
	Steven Rostedt <rostedt@goodmis.org>,
	Claire Jensen <cjense@google.com>
Cc: eranian@google.com, Ian Rogers <irogers@google.com>
Subject: [PATCH 1/4] perf: Enable libtracefs dynamic linking
Date: Mon, 21 Jun 2021 21:38:08 -0700	[thread overview]
Message-ID: <20210622043811.3108564-1-irogers@google.com> (raw)

Currently libtracefs isn't used by perf, but there are potential
improvements by using it as identified Steven Rostedt's e-mail:
https://lore.kernel.org/lkml/20210610154759.1ef958f0@oasis.local.home/

This change is modelled on the dynamic libtraceevent patch by Michael
Petlan:
https://lore.kernel.org/linux-perf-users/20210428092023.4009-1-mpetlan@redhat.com/

Signed-off-by: Ian Rogers <irogers@google.com>
---
 tools/build/Makefile.feature | 1 +
 tools/build/feature/Makefile | 4 ++++
 tools/perf/Makefile.config   | 9 +++++++++
 tools/perf/Makefile.perf     | 2 ++
 4 files changed, 16 insertions(+)

diff --git a/tools/build/Makefile.feature b/tools/build/Makefile.feature
index 04a8e3db8a54..c87e876b6dd7 100644
--- a/tools/build/Makefile.feature
+++ b/tools/build/Makefile.feature
@@ -53,6 +53,7 @@ FEATURE_TESTS_BASIC :=                  \
         libslang                        \
         libslang-include-subdir         \
         libtraceevent                   \
+        libtracefs                      \
         libcrypto                       \
         libunwind                       \
         pthread-attr-setaffinity-np     \
diff --git a/tools/build/feature/Makefile b/tools/build/feature/Makefile
index ec203e28407f..9488c4b4026e 100644
--- a/tools/build/feature/Makefile
+++ b/tools/build/feature/Makefile
@@ -37,6 +37,7 @@ FILES=                                          \
          test-libslang.bin                      \
          test-libslang-include-subdir.bin       \
          test-libtraceevent.bin                 \
+         test-libtracefs.bin                    \
          test-libcrypto.bin                     \
          test-libunwind.bin                     \
          test-libunwind-debug-frame.bin         \
@@ -200,6 +201,9 @@ $(OUTPUT)test-libslang-include-subdir.bin:
 $(OUTPUT)test-libtraceevent.bin:
 	$(BUILD) -ltraceevent
 
+$(OUTPUT)test-libtracefs.bin:
+	$(BUILD) -ltracefs
+
 $(OUTPUT)test-libcrypto.bin:
 	$(BUILD) -lcrypto
 
diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index a62d09808fef..3a8a54b71654 100644
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -1098,6 +1098,15 @@ ifdef LIBTRACEEVENT_DYNAMIC
   endif
 endif
 
+ifdef LIBTRACEFS_DYNAMIC
+  $(call feature_check,libtracefs)
+  ifeq ($(feature-libtracefs), 1)
+    EXTLIBS += -ltracefs
+  else
+    dummy := $(error Error: No libtracefs devel library found, please install libtracefs-dev);
+  endif
+endif
+
 # Among the variables below, these:
 #   perfexecdir
 #   perf_include_dir
diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index e47f04e5b51e..b56e26b703ff 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -130,6 +130,8 @@ include ../scripts/utilities.mak
 #
 # Define LIBTRACEEVENT_DYNAMIC to enable libtraceevent dynamic linking
 #
+# Define LIBTRACEFS_DYNAMIC to enable libtracefs dynamic linking
+#
 
 # As per kernel Makefile, avoid funny character set dependencies
 unexport LC_ALL
-- 
2.32.0.288.g62a8d224e6-goog


             reply	other threads:[~2021-06-22  4:38 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-22  4:38 Ian Rogers [this message]
2021-06-22  4:38 ` [PATCH 2/4] perf: Add define for libtraceevent version Ian Rogers
2021-06-22  4:38 ` [PATCH 3/4] perf: Add define for libtracefs version Ian Rogers
2021-06-22  4:38 ` [PATCH 4/4] libtraceevent: Increase libtraceevent logging when verbose Ian Rogers

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