OSCL-LXR

0001 # SPDX-License-Identifier: GPL-2.0
0002 OUTPUT := .output
0003 abs_out := $(abspath $(OUTPUT))
0004
0005 CLANG ?= clang
0006 LLC ?= llc
0007 LLVM_STRIP ?= llvm-strip
0008
0009 TOOLS_PATH := $(abspath ../../../../tools)
0010 BPFTOOL_SRC := $(TOOLS_PATH)/bpf/bpftool
0011 BPFTOOL_OUTPUT := $(abs_out)/bpftool
0012 DEFAULT_BPFTOOL := $(BPFTOOL_OUTPUT)/bootstrap/bpftool
0013 BPFTOOL ?= $(DEFAULT_BPFTOOL)
0014
0015 LIBBPF_SRC := $(TOOLS_PATH)/lib/bpf
0016 LIBBPF_OUTPUT := $(abs_out)/libbpf
0017 LIBBPF_DESTDIR := $(LIBBPF_OUTPUT)
0018 LIBBPF_INCLUDE := $(LIBBPF_DESTDIR)/include
0019 BPFOBJ := $(LIBBPF_OUTPUT)/libbpf.a
0020
0021 INCLUDES := -I$(OUTPUT) -I$(LIBBPF_INCLUDE) -I$(TOOLS_PATH)/include/uapi
0022 CFLAGS := -g -Wall
0023
0024 ifeq ($(V),1)
0025 Q =
0026 msg =
0027 else
0028 Q = @
0029 msg = @printf '  %-8s %s%s\n' "$(1)" "$(notdir $(2))" "$(if $(3), $(3))";
0030 MAKEFLAGS += --no-print-directory
0031 submake_extras := feature_display=0
0032 endif
0033
0034 .DELETE_ON_ERROR:
0035
0036 .PHONY: all clean
0037
0038 all: iterators.lskel.h
0039
0040 clean:
0041         $(call msg,CLEAN)
0042         $(Q)rm -rf $(OUTPUT) iterators
0043
0044 iterators.lskel.h: $(OUTPUT)/iterators.bpf.o | $(BPFTOOL)
0045         $(call msg,GEN-SKEL,$@)
0046         $(Q)$(BPFTOOL) gen skeleton -L $< > $@
0047
0048
0049 $(OUTPUT)/iterators.bpf.o: iterators.bpf.c $(BPFOBJ) | $(OUTPUT)
0050         $(call msg,BPF,$@)
0051         $(Q)$(CLANG) -g -O2 -target bpf $(INCLUDES)                           \
0052                  -c $(filter %.c,$^) -o $@ &&                                 \
0053         $(LLVM_STRIP) -g $@
0054
0055 $(OUTPUT) $(LIBBPF_OUTPUT) $(BPFTOOL_OUTPUT):
0056         $(call msg,MKDIR,$@)
0057         $(Q)mkdir -p $@
0058
0059 $(BPFOBJ): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(LIBBPF_OUTPUT)
0060         $(Q)$(MAKE) $(submake_extras) -C $(LIBBPF_SRC)                         \
0061                     OUTPUT=$(abspath $(dir $@))/ prefix=                       \
0062                     DESTDIR=$(LIBBPF_DESTDIR) $(abspath $@) install_headers
0063
0064 $(DEFAULT_BPFTOOL): | $(BPFTOOL_OUTPUT)
0065         $(Q)$(MAKE) $(submake_extras) -C $(BPFTOOL_SRC) OUTPUT=$(BPFTOOL_OUTPUT)/ bootstrap