tools/lib/bpf/Makefile

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

File Facts

System
Linux kernel
Corpus path
tools/lib/bpf/Makefile
Extension
[no extension]
Size
11161 bytes
Lines
303
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: (LGPL-2.1 OR BSD-2-Clause)
# Most of this file is copied from tools/lib/traceevent/Makefile

RM ?= rm
srctree := $(realpath $(srctree))

VERSION_SCRIPT := libbpf.map
LIBBPF_VERSION := $(shell \
	grep -oE '^LIBBPF_([0-9.]+)' $(VERSION_SCRIPT) | \
	sort -rV | head -n1 | cut -d'_' -f2)
LIBBPF_MAJOR_VERSION := $(word 1,$(subst ., ,$(LIBBPF_VERSION)))
LIBBPF_MINOR_VERSION := $(word 2,$(subst ., ,$(LIBBPF_VERSION)))

MAKEFLAGS += --no-print-directory

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

INSTALL = install

# Use DESTDIR for installing into a different root directory.
# This is useful for building a package. The program will be
# installed in this directory as if it was the root directory.
# Then the build tool can move it later.
DESTDIR ?=
DESTDIR_SQ = '$(subst ','\'',$(DESTDIR))'

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

ifeq ($(LP64), 1)
  libdir_relative = lib64
else
  libdir_relative = lib
endif

prefix ?= /usr/local
libdir = $(prefix)/$(libdir_relative)
man_dir = $(prefix)/share/man
man_dir_SQ = '$(subst ','\'',$(man_dir))'

export man_dir man_dir_SQ INSTALL
export DESTDIR DESTDIR_SQ

# Defer assigning EXTRA_CFLAGS to CFLAGS until after including
# tools/scripts/Makefile.include, as it may add flags to EXTRA_CFLAGS.
ifdef EXTRA_CFLAGS
  CFLAGS :=
else
  CFLAGS := -g -O2
endif

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

# copy a bit from Linux kbuild

INCLUDES = -I$(or $(OUTPUT),.) \
	   -I$(srctree)/tools/include -I$(srctree)/tools/include/uapi \
	   -I$(srctree)/tools/arch/$(SRCARCH)/include

export prefix libdir src obj

# Shell quotes

Annotation

Implementation Notes