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Masahiro Yamada a9a49c2ad9 kbuild: use $(srctree) instead of KBUILD_SRC to check out-of-tree build

KBUILD_SRC was conventionally used for some different purposes:
 [1] To remember the source tree path
 [2] As a flag to check if sub-make is already done
 [3] As a flag to check if Kbuild runs out of tree

For [1], we do not need to remember it because the top Makefile
can compute it by $(realpath $(dir $(lastword $(MAKEFILE_LIST))))

[2] has been replaced with self-commenting 'sub_make_done'.

For [3], we can distinguish in-tree/out-of-tree by comparing
$(srctree) and '.'

This commit converts [3] to prepare for the KBUILD_SRC removal.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

2019-04-02 23:28:04 +09:00

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SPDX-License-Identifier: GPL-2.0

ifneq ($(srctree),.)

symlinks := $(patsubst $(srctree)/$(src)/%,%,$(wildcard $(srctree)/$(src)/*.py))

quiet_cmd_symlink = SYMLINK $@ cmd_symlink = ln -fsn $(patsubst $(obj)/%,$(abspath $(srctree))/$(src)/%,$@) $@

extra-y += $(symlinks) $(addprefix $(obj)/, $(symlinks)): FORCE $(call if_changed,symlink)

endif

quiet_cmd_gen_constants_py = GEN $@ cmd_gen_constants_py =
$(CPP) -E -x c -P $(c_flags) $< > $@ ;
sed -i '1,//d;' $@

extra-y += constants.py $(obj)/constants.py: $(src)/constants.py.in FORCE $(call if_changed_dep,gen_constants_py)

clean-files := *.pyc *.pyo

656 B Raw Blame History

SPDX-License-Identifier: GPL-2.0

656 B

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