linux-kernel - [PATCH 2/7] perf: Honor parallel jobs

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Message-Id: <1361374353-30385-3-git-send-email-bp@alien8.de>
Date:	Wed, 20 Feb 2013 16:32:28 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Ingo Molnar <mingo@...nel.org>, Borislav Petkov <bp@...e.de>
Subject: [PATCH 2/7] perf: Honor parallel jobs

From: Borislav Petkov <bp@...e.de>

We need to hand down parallel build options like the internal make
--jobserver-fds one so that parallel builds can also happen when
building perf from the toplevel directory.

Make it so #1!

Signed-off-by: Borislav Petkov <bp@...e.de>
---
 Makefile                       | 4 ++--
 tools/scripts/Makefile.include | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/Makefile b/Makefile
index 2cd4c6be44f2..f14a9c9672be 100644
--- a/Makefile
+++ b/Makefile
@@ -1330,11 +1330,11 @@ kernelversion:
 # Clear a bunch of variables before executing the submake
 tools/: FORCE
 	$(Q)mkdir -p $(objtree)/tools
-	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS= O=$(objtree) subdir=tools -C $(src)/tools/
+	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/
 
 tools/%: FORCE
 	$(Q)mkdir -p $(objtree)/tools
-	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS= O=$(objtree) subdir=tools -C $(src)/tools/ $*
+	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/ $*
 
 # Single targets
 # ---------------------------------------------------------------------------
diff --git a/tools/scripts/Makefile.include b/tools/scripts/Makefile.include
index 2964b96aa55f..00a05f45b39a 100644
--- a/tools/scripts/Makefile.include
+++ b/tools/scripts/Makefile.include
@@ -70,7 +70,7 @@ ifndef V
 	QUIET_BISON    = @echo '   ' BISON $@;
 
 	descend = \
-		@echo '   ' DESCEND $(1); \
+		+@...o '   ' DESCEND $(1); \
 		mkdir -p $(OUTPUT)$(1) && \
 		$(MAKE) $(COMMAND_O) subdir=$(if $(subdir),$(subdir)/$(1),$(1)) $(PRINT_DIR) -C $(1) $(2)
 endif
-- 
1.8.1.3.535.ga923c31

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