mirror of
https://kernel.googlesource.com/pub/scm/linux/kernel/git/stable/linux-stable.git
synced 2025-09-29 17:50:53 +10:00
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>
87 lines
3.1 KiB
Makefile
87 lines
3.1 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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DT_DOC_CHECKER ?= dt-doc-validate
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DT_EXTRACT_EX ?= dt-extract-example
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DT_MK_SCHEMA ?= dt-mk-schema
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DT_SCHEMA_LINT = $(shell which yamllint || \
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echo "warning: python package 'yamllint' not installed, skipping" >&2)
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DT_SCHEMA_MIN_VERSION = 2023.9
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PHONY += check_dtschema_version
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check_dtschema_version:
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@which $(DT_DOC_CHECKER) >/dev/null || \
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{ echo "Error: '$(DT_DOC_CHECKER)' not found!" >&2; \
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echo "Ensure dtschema python package is installed and in your PATH." >&2; \
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echo "Current PATH is:" >&2; \
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echo "$$PATH" >&2; false; }
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@{ echo $(DT_SCHEMA_MIN_VERSION); \
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$(DT_DOC_CHECKER) --version 2>/dev/null || echo 0; } | sort -Vc >/dev/null || \
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{ echo "ERROR: dtschema minimum version is v$(DT_SCHEMA_MIN_VERSION)" >&2; false; }
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quiet_cmd_extract_ex = DTEX $@
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cmd_extract_ex = $(DT_EXTRACT_EX) $< > $@
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$(obj)/%.example.dts: $(src)/%.yaml check_dtschema_version FORCE
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$(call if_changed,extract_ex)
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find_all_cmd = find $(src) \( -name '*.yaml' ! \
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-name 'processed-schema*' \)
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find_cmd = $(find_all_cmd) | \
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sed 's|^$(srctree)/||' | \
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grep -F -e "$(subst :," -e ",$(DT_SCHEMA_FILES))" | \
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sed 's|^|$(srctree)/|'
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CHK_DT_EXAMPLES := $(patsubst $(srctree)/%.yaml,%.example.dtb, $(shell $(find_cmd)))
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quiet_cmd_yamllint = LINT $(src)
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cmd_yamllint = ($(find_cmd) | \
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xargs -n200 -P$$(nproc) \
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$(DT_SCHEMA_LINT) -f parsable -c $(src)/.yamllint >&2) \
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&& touch $@ || true
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quiet_cmd_chk_bindings = CHKDT $(src)
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cmd_chk_bindings = ($(find_cmd) | \
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xargs -n200 -P$$(nproc) $(DT_DOC_CHECKER) -u $(src)) \
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&& touch $@ || true
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quiet_cmd_mk_schema = SCHEMA $@
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cmd_mk_schema = f=$$(mktemp) ; \
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$(find_all_cmd) > $$f ; \
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$(DT_MK_SCHEMA) -j $(DT_MK_SCHEMA_FLAGS) @$$f > $@ ; \
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rm -f $$f
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DT_DOCS = $(patsubst $(srctree)/%,%,$(shell $(find_all_cmd)))
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override DTC_FLAGS := \
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-Wno-avoid_unnecessary_addr_size \
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-Wno-graph_child_address \
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-Wno-interrupt_provider \
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-Wno-unique_unit_address \
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-Wunique_unit_address_if_enabled
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$(obj)/processed-schema.json: $(DT_DOCS) check_dtschema_version FORCE
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$(call if_changed,mk_schema)
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targets += .dt-binding.checked .yamllint.checked
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$(obj)/.yamllint.checked: $(DT_DOCS) $(src)/.yamllint FORCE
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$(if $(DT_SCHEMA_LINT),$(call if_changed,yamllint),)
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$(obj)/.dt-binding.checked: $(DT_DOCS) FORCE
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$(call if_changed,chk_bindings)
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always-y += processed-schema.json
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targets += $(patsubst $(obj)/%,%, $(CHK_DT_EXAMPLES))
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targets += $(patsubst $(obj)/%.dtb,%.dts, $(CHK_DT_EXAMPLES))
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# Hack: avoid 'Argument list too long' error for 'make clean'. Remove most of
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# build artifacts here before they are processed by scripts/Makefile.clean
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clean-files = $(shell find $(obj) \( -name '*.example.dts' -o \
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-name '*.example.dtb' \) -delete 2>/dev/null)
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dt_compatible_check: $(obj)/processed-schema.json
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$(Q)$(srctree)/scripts/dtc/dt-extract-compatibles $(srctree) | xargs dt-check-compatible -v -s $<
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PHONY += dt_binding_check
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dt_binding_check: $(obj)/.dt-binding.checked $(obj)/.yamllint.checked $(CHK_DT_EXAMPLES)
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