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b1992c3772
Kbuild conventionally uses $(obj)/ for generated files, and $(src)/ for
checked-in source files. It is merely a convention without any functional
difference. In fact, $(obj) and $(src) are exactly the same, as defined
in scripts/Makefile.build:
src := $(obj)
When the kernel is built in a separate output directory, $(src) does
not accurately reflect the source directory location. While Kbuild
resolves this discrepancy by specifying VPATH=$(srctree) to search for
source files, it does not cover all cases. For example, when adding a
header search path for local headers, -I$(srctree)/$(src) is typically
passed to the compiler.
This introduces inconsistency between upstream and downstream Makefiles
because $(src) is used instead of $(srctree)/$(src) for the latter.
To address this inconsistency, this commit changes the semantics of
$(src) so that it always points to the directory in the source tree.
Going forward, the variables used in Makefiles will have the following
meanings:
$(obj) - directory in the object tree
$(src) - directory in the source tree (changed by this commit)
$(objtree) - the top of the kernel object tree
$(srctree) - the top of the kernel source tree
Consequently, $(srctree)/$(src) in upstream Makefiles need to be replaced
with $(src).
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
24 lines
524 B
Makefile
24 lines
524 B
Makefile
# SPDX-License-Identifier: GPL-2.0
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#
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# Copyright 2009 Simtec Electronics
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include $(src)/Makefile.s3c64xx
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# Objects we always build independent of SoC choice
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obj-y += init.o cpu.o
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# devices
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obj-$(CONFIG_SAMSUNG_ATAGS) += platformdata.o
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obj-$(CONFIG_SAMSUNG_ATAGS) += devs.o
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obj-$(CONFIG_SAMSUNG_ATAGS) += dev-uart.o
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obj-$(CONFIG_GPIO_SAMSUNG) += gpio-samsung.o
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# PM support
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obj-$(CONFIG_SAMSUNG_PM) += pm.o pm-common.o
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obj-$(CONFIG_SAMSUNG_PM_GPIO) += pm-gpio.o
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obj-$(CONFIG_SAMSUNG_WAKEMASK) += wakeup-mask.o
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