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# Common Makefile parts for BPF-building with libbpf
# --------------------------------------------------
# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
#
# This file should be included from your Makefile like:
# LIB_DIR = ../lib/
# include $(LIB_DIR)/common.mk
#
# It is expected that you define the variables:
# XDP_TARGETS and USER_TARGETS
# as a space-separated list
#
XDP_C = ${XDP_TARGETS:=.c}
XDP_OBJ = ${XDP_C:.c=.o}
BPF_SKEL_OBJ = ${BPF_SKEL_TARGETS:=.o}
BPF_SKEL_H = ${BPF_SKEL_OBJ:.bpf.o=.skel.h}
USER_C := ${USER_TARGETS:=.c}
USER_OBJ := ${USER_C:.c=.o}
TEST_C := ${TEST_TARGETS:=.c}
TEST_OBJ := ${TEST_C:.c=.o}
XDP_OBJ_INSTALL ?= $(XDP_OBJ)
MAN_FILES := $(MAN_PAGE)
# Expect this is defined by including Makefile, but define if not
LIB_DIR ?= ../lib
LDLIBS ?= $(USER_LIBS)
LDLIBS += -lm
include $(LIB_DIR)/defines.mk
include $(LIB_DIR)/libxdp/libxdp.mk
# get list of objects in util
include $(LIB_DIR)/util/util.mk
# Extend if including Makefile already added some
LIB_OBJS += $(foreach obj,$(UTIL_OBJS),$(LIB_DIR)/util/$(obj))
EXTRA_DEPS +=
EXTRA_USER_DEPS +=
LDFLAGS+=-L$(LIBXDP_DIR)
ifeq ($(DYNAMIC_LIBXDP),1)
LDLIBS:=-lxdp $(LDLIBS)
OBJECT_LIBXDP:=$(LIBXDP_DIR)/libxdp.so.$(LIBXDP_VERSION)
else
LDLIBS:=-l:libxdp.a $(LDLIBS)
OBJECT_LIBXDP:=$(LIBXDP_DIR)/libxdp.a
endif
# Detect submodule libbpf source file changes
ifeq ($(SYSTEM_LIBBPF),n)
LIBBPF_SOURCES := $(wildcard $(LIBBPF_DIR)/src/*.[ch])
endif
LIBXDP_SOURCES := $(wildcard $(LIBXDP_DIR)/*.[ch] $(LIBXDP_DIR)/*.in)
# BPF-prog kern and userspace shares struct via header file:
KERN_USER_H ?= $(wildcard common_kern_user.h)
CFLAGS += -I$(HEADER_DIR) -I$(LIB_DIR)/util $(ARCH_INCLUDES)
BPF_CFLAGS += -I$(HEADER_DIR) $(ARCH_INCLUDES)
BPF_HEADERS := $(wildcard $(HEADER_DIR)/bpf/*.h) $(wildcard $(HEADER_DIR)/xdp/*.h)
all: $(USER_TARGETS) $(XDP_OBJ) $(EXTRA_TARGETS) $(TEST_TARGETS) man
.PHONY: clean
clean::
$(Q)rm -f $(USER_TARGETS) $(XDP_OBJ) $(USER_OBJ) $(TEST_OBJ) $(USER_GEN) $(BPF_SKEL_H) *.ll
.PHONY: install
install: all install_local
install -m 0755 -d $(DESTDIR)$(SBINDIR)
install -m 0755 -d $(DESTDIR)$(BPF_OBJECT_DIR)
$(if $(USER_TARGETS),install -m 0755 $(USER_TARGETS) $(DESTDIR)$(SBINDIR))
$(if $(XDP_OBJ_INSTALL),install -m 0755 $(XDP_OBJ_INSTALL) $(DESTDIR)$(BPF_OBJECT_DIR))
$(if $(MAN_FILES),install -m 0755 -d $(DESTDIR)$(MANDIR)/man8)
$(if $(MAN_FILES),install -m 0644 $(MAN_FILES) $(DESTDIR)$(MANDIR)/man8)
$(if $(SCRIPTS_FILES),install -m 0755 -d $(DESTDIR)$(SCRIPTSDIR))
$(if $(SCRIPTS_FILES),install -m 0755 $(SCRIPTS_FILES) $(DESTDIR)$(SCRIPTSDIR))
$(if $(TEST_FILE),install -m 0755 -d $(DESTDIR)$(SCRIPTSDIR)/tests/$(TOOL_NAME))
$(if $(TEST_FILE),install -m 0644 $(TEST_FILE) $(DESTDIR)$(SCRIPTSDIR)/tests/$(TOOL_NAME))
$(if $(TEST_FILE_DEPS),install -m 0644 $(TEST_FILE_DEPS) $(DESTDIR)$(SCRIPTSDIR)/tests/$(TOOL_NAME))
$(if $(TEST_TARGETS),install -m 0755 $(TEST_TARGETS) $(DESTDIR)$(SCRIPTSDIR))
.PHONY: install_local
install_local::
$(OBJECT_LIBBPF): $(LIBBPF_SOURCES)
$(Q)$(MAKE) -C $(LIB_DIR) libbpf
$(OBJECT_LIBXDP): $(LIBXDP_SOURCES)
$(Q)$(MAKE) -C $(LIBXDP_DIR)
$(CONFIGMK):
$(Q)$(MAKE) -C $(LIB_DIR)/.. config.mk
# Create expansions for dependencies
LIB_H := ${LIB_OBJS:.o=.h}
# Detect if any of common obj changed and create dependency on .h-files
$(LIB_OBJS): %.o: %.c %.h $(LIB_H)
$(Q)$(MAKE) -C $(dir $@) $(notdir $@)
ALL_EXEC_TARGETS=$(USER_TARGETS) $(TEST_TARGETS)
$(ALL_EXEC_TARGETS): %: %.c $(OBJECT_LIBBPF) $(OBJECT_LIBXDP) $(LIBMK) $(LIB_OBJS) $(KERN_USER_H) $(EXTRA_DEPS) $(EXTRA_USER_DEPS) $(BPF_SKEL_H) $(USER_EXTRA_C)
$(QUIET_CC)$(CC) -Wall $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) -o $@ $(LIB_OBJS) \
$< $(USER_EXTRA_C) $(LDLIBS)
$(XDP_OBJ): %.o: %.c $(KERN_USER_H) $(EXTRA_DEPS) $(BPF_HEADERS) $(LIBMK)
$(QUIET_CLANG)$(CLANG) -S \
-target $(BPF_TARGET) \
-D __BPF_TRACING__ \
$(BPF_CFLAGS) \
-Wall \
-Wno-unused-value \
-Wno-pointer-sign \
-Wno-compare-distinct-pointer-types \
-Werror \
-O2 -emit-llvm -c -g -o ${@:.o=.ll} $<
$(QUIET_LLC)$(LLC) -march=$(BPF_TARGET) -filetype=obj -o $@ ${@:.o=.ll}
$(BPF_SKEL_H): %.skel.h: %.bpf.o
$(QUIET_GEN)$(BPFTOOL) gen skeleton $< name ${@:.skel.h=} > $@
.PHONY: man
ifeq ($(EMACS),)
man: ;
else
man: $(MAN_PAGE)
$(MAN_PAGE): README.org $(LIBMK) $(LIB_DIR)/export-man.el
$(QUIET_GEN)$(EMACS) -Q --batch --load "$(LIB_DIR)/export-man.el" \
--eval "(export-man-page \"$@\" \"$<\" \"$(HAVE_FEATURES)\" \"v$(TOOLS_VERSION)\")"
endif
.PHONY: test
ifeq ($(TEST_FILE),)
test:
@echo " No tests defined"
else
test: all
$(Q)$(TEST_DIR)/test_runner.sh $(TEST_FILE)
endif
|
