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kbuild: scripts/mkmakefile: dynamic determination of output directory

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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>
This commit is contained in:
Jan Beulich 2008-01-11 09:09:00 +00:00 committed by Sam Ravnborg
parent df578e7d83
commit 1d3b3bfab1
1 changed files with 7 additions and 3 deletions
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10
scripts/mkmakefile
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@ -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