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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 $(src).
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
58 lines
1.0 KiB
Makefile
58 lines
1.0 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0-only
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ccflags-y := -I$(src) -I$(src)/indexer
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obj-$(CONFIG_DM_VDO) += dm-vdo.o
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dm-vdo-objs := \
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action-manager.o \
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admin-state.o \
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block-map.o \
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completion.o \
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data-vio.o \
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dedupe.o \
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dm-vdo-target.o \
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dump.o \
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encodings.o \
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errors.o \
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flush.o \
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funnel-queue.o \
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funnel-workqueue.o \
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int-map.o \
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io-submitter.o \
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logger.o \
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logical-zone.o \
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memory-alloc.o \
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message-stats.o \
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murmurhash3.o \
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packer.o \
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permassert.o \
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physical-zone.o \
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priority-table.o \
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recovery-journal.o \
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repair.o \
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slab-depot.o \
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status-codes.o \
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string-utils.o \
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thread-device.o \
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thread-registry.o \
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thread-utils.o \
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vdo.o \
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vio.o \
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wait-queue.o \
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indexer/chapter-index.o \
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indexer/config.o \
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indexer/delta-index.o \
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indexer/funnel-requestqueue.o \
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indexer/geometry.o \
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indexer/index.o \
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indexer/index-layout.o \
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indexer/index-page-map.o \
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indexer/index-session.o \
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indexer/io-factory.o \
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indexer/open-chapter.o \
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indexer/radix-sort.o \
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indexer/sparse-cache.o \
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indexer/volume.o \
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indexer/volume-index.o
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