linux-kernel - [PATCH 46/52] tools/perf/build: Pass through all targets to Makefile.perf

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Message-Id: <1381227082-22039-47-git-send-email-mingo@kernel.org>
Date:	Tue,  8 Oct 2013 12:11:16 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	linux-kernel@...r.kernel.org
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Namhyung Kim <namhyung@...nel.org>,
	David Ahern <dsahern@...il.com>, Jiri Olsa <jolsa@...hat.com>
Subject: [PATCH 46/52] tools/perf/build: Pass through all targets to Makefile.perf

Jiri reported that 'make .o' stopped working:

  > [jolsa@...va perf]$ make -f Makefile perf.o
  > cc    -c -o perf.o perf.c
  > In file included from builtin.h:4:0,
  >                  from perf.c:9:
  > util/util.h:74:24: fatal error: lk/debugfs.h: No such file or directory
  > compilation terminated.
  > make: *** [perf.o] Error 1

This is due to GNU make having built-in rules for popular targets such
as *.o. Clear them out so that all targets as passed through to Makefile.perf.

Reported-by: Jiri Olsa <jolsa@...hat.com>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: David Ahern <dsahern@...il.com>
Link: http://lkml.kernel.org/n/tip-5wkuvmlaaxtfgepKcvRij8sh@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 tools/perf/Makefile | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 3b925ad..6f6f13a 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -1,3 +1,10 @@
+
+#
+# Clear out the built-in rules GNU make defines by default (such as .o targets),
+# so that we pass through all targets to Makefile.perf:
+#
+.SUFFIXES:
+
 #
 # Do a parallel build with multiple jobs, based on the number of CPUs online
 # in this system: 'make -j8' on a 8-CPU system, etc.
-- 
1.8.3.1

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