tools/build/Makefile

Source file repositories/reference/linux-study-clean/tools/build/Makefile

File Facts

System
Linux kernel
Corpus path
tools/build/Makefile
Extension
[no extension]
Size
1561 bytes
Lines
59
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: build/configuration rule
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

# SPDX-License-Identifier: GPL-2.0
ifeq ($(srctree),)
srctree := $(patsubst %/,%,$(dir $(CURDIR)))
srctree := $(patsubst %/,%,$(dir $(srctree)))
endif

include $(srctree)/tools//scripts/Makefile.include

define allow-override
  $(if $(or $(findstring environment,$(origin $(1))),\
            $(findstring command line,$(origin $(1)))),,\
    $(eval $(1) = $(2)))
endef

$(call allow-override,CC,$(CROSS_COMPILE)gcc)
$(call allow-override,LD,$(CROSS_COMPILE)ld)

export HOSTCC HOSTLD HOSTAR

export srctree CC LD

MAKEFLAGS := --no-print-directory
build     := -f $(srctree)/tools/build/Makefile.build dir=. obj

all: $(OUTPUT)fixdep

# Make sure there's anything to clean,
# feature contains check for existing OUTPUT
TMP_O := $(if $(OUTPUT),$(OUTPUT)feature/,./)

clean:
	$(call QUIET_CLEAN, fixdep)
	$(Q)find $(or $(OUTPUT),.) -name '*.o' -delete -o -name '\.*.cmd' -delete -o -name '\.*.d' -delete
	$(Q)rm -f $(OUTPUT)fixdep
	$(call QUIET_CLEAN, feature-detect)
ifneq ($(wildcard $(TMP_O)),)
	$(Q)$(MAKE) -C feature OUTPUT=$(TMP_O) clean >/dev/null
endif

FIXDEP		:= $(OUTPUT)fixdep
FIXDEP_IN	:= $(OUTPUT)fixdep-in.o

# To track fixdep's dependencies properly, fixdep needs to run on itself.
# Build it twice the first time.
$(FIXDEP_IN): FORCE
	$(Q)if [ ! -f $(FIXDEP) ]; then						\
		$(MAKE) $(build)=fixdep HOSTCFLAGS="$(KBUILD_HOSTCFLAGS)";	\
		rm -f $(FIXDEP).o;						\
	fi
	$(Q)$(MAKE) $(build)=fixdep HOSTCFLAGS="$(KBUILD_HOSTCFLAGS)"


$(FIXDEP): $(FIXDEP_IN)
	$(QUIET_LINK)$(HOSTCC) $(FIXDEP_IN) $(KBUILD_HOSTLDFLAGS) -o $@

FORCE:

.PHONY: FORCE

Annotation

Implementation Notes