From 1d3b3bfab121cdef07d19797f42f413dccdd65f0 Mon Sep 17 00:00:00 2001
From: Jan Beulich <jbeulich@novell.com>
Date: Fri, 11 Jan 2008 09:09:00 +0000
Subject: [PATCH] kbuild: scripts/mkmakefile: dynamic determination of output
 directory

Rather than fixing the output directory in the generated Makefile,
determine it from the placement of Makefile. This allows moving
the build tree around or accessing it through different mount paths.

(The lastword definition is a compatibility one for make prior to 3.81;
newer make will simply ignore it and use the [faster] built-in.)

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
---
 scripts/mkmakefile | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/scripts/mkmakefile b/scripts/mkmakefile
index e0f54b9d8feca..e65d8b33faa4c 100644
--- a/scripts/mkmakefile
+++ b/scripts/mkmakefile
@@ -25,8 +25,11 @@ cat << EOF > $2/Makefile
 VERSION = $3
 PATCHLEVEL = $4
 
-KERNELSRC    := $1
-KERNELOUTPUT := $2
+lastword = \$(word \$(words \$(1)),\$(1))
+makedir := \$(dir \$(call lastword,\$(MAKEFILE_LIST)))
+
+MAKEARGS := -C $1
+MAKEARGS += O=\$(if \$(patsubst /%,,\$(makedir)),\$(CURDIR)/)\$(patsubst %/,%,\$(makedir))
 
 MAKEFLAGS += --no-print-directory
 
@@ -35,10 +38,11 @@ MAKEFLAGS += --no-print-directory
 all	:= \$(filter-out all Makefile,\$(MAKECMDGOALS))
 
 all:
-	\$(MAKE) -C \$(KERNELSRC) O=\$(KERNELOUTPUT) \$(all)
+	\$(MAKE) \$(MAKEARGS) \$(all)
 
 Makefile:;
 
 \$(all) %/: all
 	@:
+
 EOF
-- 
GitLab