tools/bpf/Makefile

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

File Facts

System
Linux kernel
Corpus path
tools/bpf/Makefile
Extension
[no extension]
Size
3430 bytes
Lines
124
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
include ../scripts/Makefile.include

prefix ?= /usr/local

LEX = flex
YACC = bison
MAKE = make
INSTALL ?= install

CFLAGS += -Wall -O2
CFLAGS += -D__EXPORTED_HEADERS__ -I$(srctree)/tools/include/uapi \
	  -I$(srctree)/tools/include
CFLAGS += $(EXTRA_CFLAGS)

# This will work when bpf is built in tools env. where srctree
# isn't set and when invoked from selftests build, where srctree
# is set to ".". building_out_of_srctree is undefined for in srctree
# builds
ifeq ($(srctree),)
update_srctree := 1
endif
ifndef building_out_of_srctree
update_srctree := 1
endif
ifeq ($(update_srctree),1)
srctree := $(patsubst %/,%,$(dir $(CURDIR)))
srctree := $(patsubst %/,%,$(dir $(srctree)))
endif

FEATURE_USER = .bpf
FEATURE_TESTS = libbfd disassembler-four-args disassembler-init-styled
FEATURE_DISPLAY = libbfd

check_feat := 1
NON_CHECK_FEAT_TARGETS := clean bpftool_clean resolve_btfids_clean
ifdef MAKECMDGOALS
ifeq ($(filter-out $(NON_CHECK_FEAT_TARGETS),$(MAKECMDGOALS)),)
  check_feat := 0
endif
endif

ifeq ($(check_feat),1)
ifeq ($(FEATURES_DUMP),)
include $(srctree)/tools/build/Makefile.feature
else
include $(FEATURES_DUMP)
endif
endif

ifeq ($(feature-disassembler-four-args), 1)
CFLAGS += -DDISASM_FOUR_ARGS_SIGNATURE
endif
ifeq ($(feature-disassembler-init-styled), 1)
CFLAGS += -DDISASM_INIT_STYLED
endif

$(OUTPUT)%.yacc.c: $(srctree)/tools/bpf/%.y
	$(QUIET_BISON)$(YACC) -o $@ -d $<

$(OUTPUT)%.lex.c: $(srctree)/tools/bpf/%.l
	$(QUIET_FLEX)$(LEX) -o $@ $<

$(OUTPUT)%.o: $(srctree)/tools/bpf/%.c
	$(QUIET_CC)$(CC) $(CFLAGS) -c -o $@ $<

$(OUTPUT)%.yacc.o: $(OUTPUT)%.yacc.c
	$(QUIET_CC)$(CC) $(CFLAGS) -c -o $@ $<
$(OUTPUT)%.lex.o: $(OUTPUT)%.lex.c
	$(QUIET_CC)$(CC) $(CFLAGS) -c -o $@ $<

Annotation

Implementation Notes