Commit 1c9e70a5 authored Mar 31, 2014 by Masahiro Yamada Committed by Michal Marek Mar 31, 2014

kbuild: create a build directory automatically for out-of-tree build



Kbuild supports saving output files in a separate directory.
But the build directory must be created beforehand. For example,

  $ mkdir -p dir/to/store/output/files
  $ make O=dir/to/store/output/files defconfig

Creating a build directory automatically would be useful.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Michal Marek <mmarek@suse.cz>

parent a03fcb50

Makefile

+3 −2

Original line number	Diff line number	Diff line
		@@ -120,9 +120,10 @@ ifneq ($(KBUILD_OUTPUT),)
		# Invoke a second make in the output directory, passing relevant variables
		# check that the output directory actually exists
		saved-output := $(KBUILD_OUTPUT)
		KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
		KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
		&& /bin/pwd)
		$(if $(KBUILD_OUTPUT),, \
		$(error output directory "$(saved-output)" does not exist))
		$(error failed to create output directory "$(saved-output)"))

		PHONY += $(MAKECMDGOALS) sub-make

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