tools/bpf/resolve_btfids/Makefile

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

File Facts

System
Linux kernel
Corpus path
tools/bpf/resolve_btfids/Makefile
Extension
[no extension]
Size
3537 bytes
Lines
120
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-only
include ../../scripts/Makefile.include
include ../../scripts/Makefile.arch

srctree := $(abspath $(CURDIR)/../../../)

ifeq ($(V),1)
  msg =
else
  ifeq ($(silent),1)
    msg =
  else
    msg = @printf '  %-8s %s%s\n' "$(1)" "$(notdir $(2))" "$(if $(3), $(3))";
  endif
  MAKEFLAGS=--no-print-directory
endif

# Overrides for the prepare step libraries.
HOST_OVERRIDES := AR="$(HOSTAR)" CC="$(HOSTCC)" LD="$(HOSTLD)" ARCH="$(HOSTARCH)" \
		  CROSS_COMPILE="" CLANG_CROSS_FLAGS="" EXTRA_CFLAGS="$(HOSTCFLAGS)"

RM      ?= rm
HOSTCC  ?= gcc
HOSTLD  ?= ld
HOSTAR  ?= ar
HOSTPKG_CONFIG ?= pkg-config
CROSS_COMPILE =

OUTPUT ?= $(srctree)/tools/bpf/resolve_btfids/

LIBBPF_SRC := $(srctree)/tools/lib/bpf/
SUBCMD_SRC := $(srctree)/tools/lib/subcmd/

BPFOBJ     := $(OUTPUT)/libbpf/libbpf.a
LIBBPF_OUT := $(abspath $(dir $(BPFOBJ)))/
SUBCMDOBJ  := $(OUTPUT)/libsubcmd/libsubcmd.a
SUBCMD_OUT := $(abspath $(dir $(SUBCMDOBJ)))/

LIBBPF_DESTDIR := $(LIBBPF_OUT)
LIBBPF_INCLUDE := $(LIBBPF_DESTDIR)include

SUBCMD_DESTDIR := $(SUBCMD_OUT)
SUBCMD_INCLUDE := $(SUBCMD_DESTDIR)include

BINARY     := $(OUTPUT)/resolve_btfids
BINARY_IN  := $(BINARY)-in.o

all: $(BINARY)

prepare: $(BPFOBJ) $(SUBCMDOBJ)

$(OUTPUT) $(OUTPUT)/libsubcmd $(LIBBPF_OUT):
	$(call msg,MKDIR,,$@)
	$(Q)mkdir -p $(@)

$(SUBCMDOBJ): fixdep FORCE | $(OUTPUT)/libsubcmd
	$(Q)$(MAKE) -C $(SUBCMD_SRC) OUTPUT=$(SUBCMD_OUT) \
		    DESTDIR=$(SUBCMD_DESTDIR) $(HOST_OVERRIDES) prefix= subdir= \
		    $(abspath $@) install_headers

$(BPFOBJ): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(LIBBPF_OUT)
	$(Q)$(MAKE) $(submake_extras) -C $(LIBBPF_SRC) OUTPUT=$(LIBBPF_OUT)    \
		    DESTDIR=$(LIBBPF_DESTDIR) $(HOST_OVERRIDES) prefix= subdir= \
		    $(abspath $@) install_headers

LIBELF_FLAGS := $(shell $(HOSTPKG_CONFIG) libelf --cflags 2>/dev/null)

ifneq ($(filter -static,$(EXTRA_LDFLAGS)),)
LIBELF_LIBS  := $(shell $(HOSTPKG_CONFIG) libelf --libs --static 2>/dev/null || echo -lelf -lzstd)
else

Annotation

Implementation Notes