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From: Jiri Olsa <jolsa@kernel.org>
To: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Borislav Petkov <bp@suse.de>,
	Brian Norris <computersforpeace@gmail.com>,
	David Ahern <dsahern@gmail.com>,
	David Howells <dhowells@redhat.com>,
	Ingo Molnar <mingo@kernel.org>, Michal Marek <mmarek@suse.cz>,
	Namhyung Kim <namhyung@kernel.org>,
	Paul Mackerras <paulus@samba.org>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	Sam Ravnborg <sam@ravnborg.org>,
	linux-kbuild@vger.kernel.org, lkml <linux-kernel@vger.kernel.org>
Subject: [PATCH 2/3] tools build: Fix Makefile(s) to properly invoke tools build
Date: Sat, 18 Apr 2015 22:34:39 +0200
Message-ID: <1429389280-18720-3-git-send-email-jolsa@kernel.org> (raw)
In-Reply-To: <1429389280-18720-1-git-send-email-jolsa@kernel.org>

Several fixes were needed to allow following builds:
  $ make tools/tmon
  $ make -C <kernelsrc> tools/perf
  $ make -C <kernelsrc>/tools perf

 - some of the tools (perf) use same make variables as in
   kernel build, unsetting srctree and objtree
 - using original $(O) for O variable
 - perf build does not follow the descend function setup
   invoking it via it's own make rule

I tried the rest of the tools/Makefile targets and they
seem to work now.

Reported-by: Brian Norris <computersforpeace@gmail.com>
Link: http://lkml.kernel.org/n/tip-pvncmskx7tw8vpolkfqmcgrf@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
 Makefile       |  5 ++---
 tools/Makefile | 12 +++++++++++-
 2 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/Makefile b/Makefile
index da36a3be7969..b1ca0607ed2e 100644
--- a/Makefile
+++ b/Makefile
@@ -214,7 +214,6 @@ VPATH		:= $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
 
 export srctree objtree VPATH
 
-
 # SUBARCH tells the usermode build what the underlying arch is.  That is set
 # first, and if a usermode build is happening, the "ARCH=um" on the command
 # line overrides the setting of ARCH below.  If a native build is happening,
@@ -1504,11 +1503,11 @@ image_name:
 # Clear a bunch of variables before executing the submake
 tools/: FORCE
 	$(Q)mkdir -p $(objtree)/tools
-	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/
+	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(O) subdir=tools -C $(src)/tools/
 
 tools/%: FORCE
 	$(Q)mkdir -p $(objtree)/tools
-	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/ $*
+	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(O) subdir=tools -C $(src)/tools/ $*
 
 # Single targets
 # ---------------------------------------------------------------------------
diff --git a/tools/Makefile b/tools/Makefile
index 01995cc8ac44..b35102721cbb 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -1,3 +1,8 @@
+# Some of the tools (perf) use same make variables
+# as in kernel build.
+export srctree=
+export objtree=
+
 include scripts/Makefile.include
 
 help:
@@ -50,8 +55,13 @@ liblockdep: FORCE
 libapi: FORCE
 	$(call descend,lib/api)
 
+# The perf build does not follow the descend function setup,
+# invoking it via it's own make rule.
+PERF_O   = $(if $(O),$(O)/tools/perf,)
+
 perf: FORCE
-	$(call descend,$@)
+	$(Q)mkdir -p $(PERF_O) .
+	$(Q)$(MAKE) --no-print-directory -C perf O=$(PERF_O) subdir=
 
 selftests: FORCE
 	$(call descend,testing/$@)
-- 
1.9.3


  parent reply index

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-04-18 20:34 [PATCH 0/3] tools build: Fix tools Makefile Jiri Olsa
2015-04-18 20:34 ` [PATCH 1/3] tools build: No need to make libapi for perf explicitly Jiri Olsa
2015-04-20 20:12   ` Arnaldo Carvalho de Melo
2015-05-06  2:56   ` [tip:perf/core] " tip-bot for Jiri Olsa
2015-04-18 20:34 ` Jiri Olsa [this message]
2015-05-06  2:56   ` [tip:perf/core] tools build: Fix Makefile(s) to properly invoke tools build tip-bot for Jiri Olsa
2015-04-18 20:34 ` [PATCH 3/3] perf tests: Add build tests for building perf from kernel source root and tools Jiri Olsa
2015-05-06  2:56   ` [tip:perf/core] " tip-bot for Jiri Olsa

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