mirror of
https://github.com/xdp-project/bpf-examples.git
synced 2024-05-06 15:54:53 +00:00
88 lines
2.4 KiB
Makefile
88 lines
2.4 KiB
Makefile
# Common Makefile parts for BPF-building with libbpf
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# --------------------------------------------------
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# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
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#
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# This file should be included from your Makefile like:
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# LIB_DIR = ../lib/
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# include $(LIB_DIR)/common.mk
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#
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# It is expected that you define the variables:
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# BPF_TARGETS and USER_TARGETS
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# as a space-separated list
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#
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BPF_C = ${BPF_TARGETS:=.c}
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BPF_OBJ = ${BPF_C:.c=.o}
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USER_C := ${USER_TARGETS:=.c}
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USER_OBJ := ${USER_C:.c=.o}
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BPF_OBJ_INSTALL ?= $(BPF_OBJ)
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# Expect this is defined by including Makefile, but define if not
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LIB_DIR ?= ../lib
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LDLIBS ?= $(USER_LIBS)
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include $(LIB_DIR)/defines.mk
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# Extend if including Makefile already added some
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LIB_OBJS += $(foreach obj,$(UTIL_OBJS),$(LIB_DIR)/util/$(obj))
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EXTRA_DEPS +=
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EXTRA_USER_DEPS +=
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# Detect submodule libbpf source file changes
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ifeq ($(SYSTEM_LIBBPF),n)
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LIBBPF_SOURCES := $(wildcard $(LIBBPF_DIR)/src/*.[ch])
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endif
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# BPF-prog kern and userspace shares struct via header file:
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KERN_USER_H ?= $(wildcard common_kern_user.h)
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CFLAGS += -I$(HEADER_DIR) -I$(LIB_DIR)/util $(EXTRA_CFLAGS)
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BPF_CFLAGS += -I$(HEADER_DIR) $(EXTRA_CFLAGS)
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BPF_HEADERS := $(wildcard $(HEADER_DIR)/bpf/*.h) $(wildcard $(HEADER_DIR)/xdp/*.h)
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all: $(USER_TARGETS) $(BPF_OBJ) $(EXTRA_TARGETS)
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.PHONY: clean
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clean::
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$(Q)rm -f $(USER_TARGETS) $(BPF_OBJ) $(USER_OBJ) $(USER_GEN) *.ll
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$(OBJECT_LIBBPF): $(LIBBPF_SOURCES)
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$(Q)$(MAKE) -C $(LIB_DIR) libbpf
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$(CONFIGMK):
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$(Q)$(MAKE) -C $(LIB_DIR)/.. config.mk
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# Create expansions for dependencies
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LIB_H := ${LIB_OBJS:.o=.h}
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# Detect if any of common obj changed and create dependency on .h-files
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$(LIB_OBJS): %.o: %.c %.h $(LIB_H)
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$(Q)$(MAKE) -C $(dir $@) $(notdir $@)
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$(USER_TARGETS): %: %.c $(OBJECT_LIBBPF) $(OBJECT_LIBXDP) $(LIBMK) $(LIB_OBJS) $(KERN_USER_H) $(EXTRA_DEPS) $(EXTRA_USER_DEPS)
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$(QUIET_CC)$(CC) -Wall $(CFLAGS) $(LDFLAGS) -o $@ $(LIB_OBJS) \
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$< $(LDLIBS)
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$(BPF_OBJ): %.o: %.c $(KERN_USER_H) $(EXTRA_DEPS) $(BPF_HEADERS) $(LIBMK)
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$(QUIET_CLANG)$(CLANG) -S \
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-target bpf \
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-D __BPF_TRACING__ \
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$(BPF_CFLAGS) \
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-Wall \
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-Wno-unused-value \
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-Wno-pointer-sign \
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-Wno-compare-distinct-pointer-types \
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-O2 -emit-llvm -c -g -o ${@:.o=.ll} $<
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$(QUIET_LLC)$(LLC) -march=bpf -filetype=obj -o $@ ${@:.o=.ll}
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.PHONY: test
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ifeq ($(TEST_FILE),)
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test:
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@echo " No tests defined"
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else
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test: all
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$(Q)$(TEST_DIR)/test_runner.sh $(TEST_FILE)
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endif
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