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https://gitee.com/openharmony/kernel_linux
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8e9b466799
Kbuild conventionally uses $(shell cd ... && /bin/pwd) idiom to get
the absolute path of the directory because GNU Make 3.80, the minimal
supported version at that time, did not support $(abspath ...) or
$(realpath ...).
Commit 37d69ee30808 ("docs: bump minimal GNU Make version to 3.81")
dropped the GNU Make 3.80 support, so we are now allowed to use those
make-builtin helpers.
This conversion will provide better portability without relying on
the pwd command or its location /bin/pwd.
I am intentionally using $(realpath ...) instead $(abspath ...) in
some places. The difference between the two is $(realpath ...)
returns an empty string if the given path does not exist. It is
convenient in places where we need to error-out if the makefile fails
to create an output directory.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Thierry Reding <treding@nvidia.com>
24 lines
564 B
Makefile
24 lines
564 B
Makefile
always := gdb-scripts
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SRCTREE := $(abspath $(srctree))
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$(obj)/gdb-scripts:
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ifneq ($(KBUILD_SRC),)
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$(Q)ln -fsn $(SRCTREE)/$(obj)/*.py $(objtree)/$(obj)
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endif
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@:
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quiet_cmd_gen_constants_py = GEN $@
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cmd_gen_constants_py = \
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$(CPP) -E -x c -P $(c_flags) $< > $@ ;\
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sed -i '1,/<!-- end-c-headers -->/d;' $@
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targets += constants.py
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$(obj)/constants.py: $(SRCTREE)/$(obj)/constants.py.in FORCE
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$(call if_changed_dep,gen_constants_py)
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build_constants_py: $(obj)/constants.py
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@:
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clean-files := *.pyc *.pyo $(if $(KBUILD_SRC),*.py) $(obj)/constants.py
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