linux-kernel - [PATCH v1] perf build: Remove libtracefs configuration

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Message-ID: <20250929170600.59000-1-irogers@google.com>
Date: Mon, 29 Sep 2025 10:06:00 -0700
From: Ian Rogers <irogers@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
	Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>, 
	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>, 
	linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v1] perf build: Remove libtracefs configuration

libtracefs isn't used by perf but not having it installed causes build
warnings. Given the library isn't used, there is no need for the
configuration or warnings so remove.

Signed-off-by: Ian Rogers <irogers@...gle.com>
---
Note, this patch was previously part of:
https://lore.kernel.org/lkml/20250823003216.733941-1-irogers@google.com/
but is self contained enough that it can be merged on its own.
---
 tools/perf/Makefile.config | 14 --------------
 1 file changed, 14 deletions(-)

diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index 5a5832ee7b53..7bc2341295c3 100644
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -1181,20 +1181,6 @@ ifneq ($(NO_LIBTRACEEVENT),1)
   else
     $(error ERROR: libtraceevent is missing. Please install libtraceevent-dev/libtraceevent-devel and/or set LIBTRACEEVENT_DIR or build with NO_LIBTRACEEVENT=1)
   endif
-
-  ifeq ($(feature-libtracefs), 1)
-    CFLAGS +=  $(shell $(PKG_CONFIG) --cflags libtracefs)
-    LDFLAGS += $(shell $(PKG_CONFIG) --libs-only-L libtracefs)
-    EXTLIBS += $(shell $(PKG_CONFIG) --libs-only-l libtracefs)
-    LIBTRACEFS_VERSION := $(shell $(PKG_CONFIG) --modversion libtracefs).0.0
-    LIBTRACEFS_VERSION_1 := $(word 1, $(subst ., ,$(LIBTRACEFS_VERSION)))
-    LIBTRACEFS_VERSION_2 := $(word 2, $(subst ., ,$(LIBTRACEFS_VERSION)))
-    LIBTRACEFS_VERSION_3 := $(word 3, $(subst ., ,$(LIBTRACEFS_VERSION)))
-    LIBTRACEFS_VERSION_CPP := $(shell expr $(LIBTRACEFS_VERSION_1) \* 255 \* 255 + $(LIBTRACEFS_VERSION_2) \* 255 + $(LIBTRACEFS_VERSION_3))
-    CFLAGS += -DLIBTRACEFS_VERSION=$(LIBTRACEFS_VERSION_CPP)
-  else
-    $(warning libtracefs is missing. Please install libtracefs-dev/libtracefs-devel)
-  endif
 endif
 
 # Among the variables below, these:
-- 
2.51.0.570.gb178f27e6d-goog