From 021ced52ab10777a945a9f278e984f1045e81764 Mon Sep 17 00:00:00 2001
From: David Howells <dhowells@redhat.com>
Date: Mon, 5 Nov 2012 21:02:08 +0000
Subject: [PATCH] --- yaml --- r: 339037 b: refs/heads/master c:
 9db48cd5ccd0d127e991c15509a0241a18043e91 h: refs/heads/master i:   339035:
 f4b013feae70185677242f26cfeca88b544657b4 v: v3

---
 [refs]                               |  2 +-
 trunk/Makefile                       |  6 ++++--
 trunk/tools/scripts/Makefile.include | 17 +++++++++++++----
 3 files changed, 18 insertions(+), 7 deletions(-)

diff --git a/[refs] b/[refs]
index 724a23c7fd33..2c79fa302632 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 0bca6cff89c6e7d1e383993cccf0f59146874a34
+refs/heads/master: 9db48cd5ccd0d127e991c15509a0241a18043e91
diff --git a/trunk/Makefile b/trunk/Makefile
index 14c93b39b929..08a31d8b7e39 100644
--- a/trunk/Makefile
+++ b/trunk/Makefile
@@ -1321,10 +1321,12 @@ kernelversion:
 
 # Clear a bunch of variables before executing the submake
 tools/: FORCE
-	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS= -C $(src)/tools/
+	$(Q)mkdir -p $(objtree)/tools
+	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS= O=$(objtree) subdir=tools -C $(src)/tools/
 
 tools/%: FORCE
-	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS= -C $(src)/tools/ $*
+	$(Q)mkdir -p $(objtree)/tools
+	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS= O=$(objtree) subdir=tools -C $(src)/tools/ $*
 
 # Single targets
 # ---------------------------------------------------------------------------
diff --git a/trunk/tools/scripts/Makefile.include b/trunk/tools/scripts/Makefile.include
index 4a9e3176f743..87467b17e05c 100644
--- a/trunk/tools/scripts/Makefile.include
+++ b/trunk/tools/scripts/Makefile.include
@@ -1,8 +1,11 @@
-ifeq ("$(origin O)", "command line")
+ifeq ($(origin O), command line)
 	dummy := $(if $(shell test -d $(O) || echo $(O)),$(error O=$(O) does not exist),)
 	ABSOLUTE_O := $(shell cd $(O) ; pwd)
-	OUTPUT := $(ABSOLUTE_O)/
+	OUTPUT := $(ABSOLUTE_O)/$(if $(subdir),$(subdir)/)
 	COMMAND_O := O=$(ABSOLUTE_O)
+ifeq ($(objtree),)
+	objtree := $(O)
+endif
 endif
 
 ifneq ($(OUTPUT),)
@@ -47,9 +50,10 @@ endif
 # Call by doing: $(call descend,directory[,target])
 #
 descend = \
-	$(QUIET_SUBDIR0)$(1) $(QUIET_SUBDIR1) $(2)
+	+mkdir -p $(OUTPUT)$(1) && \
+	$(MAKE) $(COMMAND_O) subdir=$(if $(subdir),$(subdir)/$(1),$(1)) $(PRINT_DIR) -C $(1)
 
-QUIET_SUBDIR0  = +$(MAKE) -C # space to separate -C and subdir
+QUIET_SUBDIR0  = +$(MAKE) $(COMMAND_O) -C # space to separate -C and subdir
 QUIET_SUBDIR1  =
 
 ifneq ($(findstring $(MAKEFLAGS),s),s)
@@ -64,5 +68,10 @@ ifndef V
 			 $(MAKE) $(PRINT_DIR) -C $$subdir
 	QUIET_FLEX     = @echo '   ' FLEX $@;
 	QUIET_BISON    = @echo '   ' BISON $@;
+
+	descend = \
+		@echo '   ' DESCEND $(1); \
+		mkdir -p $(OUTPUT)$(1) && \
+		$(MAKE) $(COMMAND_O) subdir=$(if $(subdir),$(subdir)/$(1),$(1)) $(PRINT_DIR) -C $(1)
 endif
 endif