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Date:	Thu, 19 Jun 2014 13:12:57 +0300
From:	Boaz Harrosh <>
To:	Michal Marek <>,
	linux-kernel <>,
	Alexei Starovoitov <>
CC:	Sam Ravnborg <>
Subject: kbuild: support of new KBUILD_FULL_PATH

The commit:

	commit 9da0763bdd82572be243fcf5161734f11568960f
	Author: Michal Marek <>
	Date:   Fri Apr 25 23:25:18 2014 +0200

	kbuild: Use relative path when building in a subdir of the source tree

	When doing make O=<subdir>, use '..' to refer to the source tree. This
	allows for more readable compiler messages, and, more importantly, it
	sets the VPATH to '..', so filenames in WARN_ON() etc. will be shorter.

	Acked-by: Sam Ravnborg <>
	Signed-off-by: Michal Marek <>

Broke IDEs and other tools which analyze the make output.
Introduce a new KBUILD_FULL_PATH switch to Makefile that will revert
to the old output if KBUILD_FULL_PATH=1 is specified.
The default is KBUILD_FULL_PATH=0

Is there a document I need to edit for this new parameter?

Signed-off-by: Boaz Harrosh <>
 Makefile | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 97b2861..778732a 100644
--- a/Makefile
+++ b/Makefile
@@ -149,11 +149,17 @@ else
 _all: modules
+# put KBUILD_FULL_PATH=1 if relative path to sources breaks your system
+ifneq ($(KBUILD_FULL_PATH), 1)
 ifeq ($(KBUILD_SRC),)
         # building in the source tree
         srctree := .
-        ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR)))
+        # if KBUILD_FULL_PATH is not empty then condition will fail
+        ifeq ($(KBUILD_FULL_PATH)$(KBUILD_SRC)/,$(dir $(CURDIR)))
                 # building in a subdirectory of the source tree
                 srctree := ..

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