mirror of
https://github.com/xdp-project/bpf-examples.git
synced 2024-05-06 15:54:53 +00:00
4ac5a33a40
Instead of having the someone redundantly named 'lib/lib-install' folder, let's rename it to just 'lib/install', and drop the 'usr/' prefix of the files installed into that directory. Also, to simplify the configure script, check in the directory to git so it's always present, and always include it in the include and linker paths. On clean we just clear out the contents. Also, copy over libbpf.a to lib/install/lib alongside libxdp.a instead of putting libbpf/src in the linker path. Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
110 lines
3.3 KiB
Makefile
110 lines
3.3 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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BPF_SKEL = ${BPF_SKEL_OBJ:.o=.skel.h}
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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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# get list of objects in util
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include $(LIB_DIR)/util/util.mk
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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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# The BPF tracing header (/usr/include/bpf/bpf_tracing.h) need to know
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# CPU architecture due to PT_REGS_PARM resolution of ASM call convention
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#
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ARCH := $(shell uname -m | sed 's/x86_64/x86/' | sed 's/aarch64/arm64/' | sed 's/ppc64le/powerpc/' | sed 's/mips.*/mips/')
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BPF_CFLAGS += -D__TARGET_ARCH_$(ARCH)
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# BPF-prog kern and userspace shares struct via header file:
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KERN_USER_H ?= $(wildcard common_kern_user.h)
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CFLAGS += -I$(INCLUDE_DIR) -I$(HEADER_DIR) -I$(LIB_DIR)/util -I$(LIB_DIR)/install/include $(EXTRA_CFLAGS)
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BPF_CFLAGS += -I$(INCLUDE_DIR) -I$(HEADER_DIR) -I$(LIB_DIR)/install/include $(EXTRA_CFLAGS)
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LDFLAGS += -L$(LIB_DIR)/install/lib
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BPF_HEADERS := $(wildcard $(HEADER_DIR)/*/*.h) $(wildcard $(INCLUDE_DIR)/*/*.h)
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all: $(USER_TARGETS) $(BPF_OBJ) $(EXTRA_TARGETS) $(BPF_SKEL)
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.PHONY: clean
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clean::
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$(Q)rm -f $(USER_TARGETS) $(BPF_OBJ) $(USER_OBJ) $(USER_GEN) $(USER_TARGETS_OBJS) *.ll
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$(OBJECT_LIBBPF): $(LIBBPF_SOURCES)
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$(Q)$(MAKE) -C $(LIB_DIR) libbpf
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$(OBJECT_LIBXDP): $(LIBXDP_SOURCES)
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$(Q)$(MAKE) -C $(LIB_DIR) libxdp
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$(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 $@)
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# Allows including Makefile to define USER_TARGETS_OBJS to compile and link with
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$(USER_TARGETS_OBJS): %.o: %.c %.h $(USER_TARGETS_OBJS_DEPS)
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$(QUIET_CC)$(CC) $(CFLAGS) -Wall -c -o $@ $<
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$(USER_TARGETS): %: %.c $(OBJECT_LIBBPF) $(OBJECT_LIBXDP) $(LIBMK) $(LIB_OBJS) $(KERN_USER_H) $(EXTRA_DEPS) $(EXTRA_USER_DEPS) $(BPF_SKEL) $(USER_TARGETS_OBJS)
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$(QUIET_CC)$(CC) -Wall $(CFLAGS) $(LDFLAGS) -o $@ $(LIB_OBJS) $(USER_TARGETS_OBJS) \
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$< $(LDLIBS)
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$(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 $@ ${@:.o=.ll}
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$(BPF_SKEL): %.skel.h: %.o
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$(QUIET_GEN)$(BPFTOOL) gen skeleton ${@:.skel.h=.o} > $@
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.PHONY: test
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ifeq ($(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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