LXR linux/kernel/bpf/preload/iterators/Makefile

   1# SPDX-License-Identifier: GPL-2.0
   2OUTPUT := .output
   3CLANG ?= clang
   4LLC ?= llc
   5LLVM_STRIP ?= llvm-strip
   6DEFAULT_BPFTOOL := $(OUTPUT)/sbin/bpftool
   7BPFTOOL ?= $(DEFAULT_BPFTOOL)
   8LIBBPF_SRC := $(abspath ../../../../tools/lib/bpf)
   9BPFOBJ := $(OUTPUT)/libbpf.a
  10BPF_INCLUDE := $(OUTPUT)
  11INCLUDES := -I$(OUTPUT) -I$(BPF_INCLUDE) -I$(abspath ../../../../tools/lib)        \
  12       -I$(abspath ../../../../tools/include/uapi)
  13CFLAGS := -g -Wall
  14
  15abs_out := $(abspath $(OUTPUT))
  16ifeq ($(V),1)
  17Q =
  18msg =
  19else
  20Q = @
  21msg = @printf '  %-8s %s%s\n' "$(1)" "$(notdir $(2))" "$(if $(3), $(3))";
  22MAKEFLAGS += --no-print-directory
  23submake_extras := feature_display=0
  24endif
  25
  26.DELETE_ON_ERROR:
  27
  28.PHONY: all clean
  29
  30all: iterators.skel.h
  31
  32clean:
  33        $(call msg,CLEAN)
  34        $(Q)rm -rf $(OUTPUT) iterators
  35
  36iterators.skel.h: $(OUTPUT)/iterators.bpf.o | $(BPFTOOL)
  37        $(call msg,GEN-SKEL,$@)
  38        $(Q)$(BPFTOOL) gen skeleton $< > $@
  39
  40
  41$(OUTPUT)/iterators.bpf.o: iterators.bpf.c $(BPFOBJ) | $(OUTPUT)
  42        $(call msg,BPF,$@)
  43        $(Q)$(CLANG) -g -O2 -target bpf $(INCLUDES)                           \
  44                 -c $(filter %.c,$^) -o $@ &&                                 \
  45        $(LLVM_STRIP) -g $@
  46
  47$(OUTPUT):
  48        $(call msg,MKDIR,$@)
  49        $(Q)mkdir -p $(OUTPUT)
  50
  51$(BPFOBJ): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(OUTPUT)
  52        $(Q)$(MAKE) $(submake_extras) -C $(LIBBPF_SRC)                         \
  53                    OUTPUT=$(abspath $(dir $@))/ $(abspath $@)
  54
  55$(DEFAULT_BPFTOOL):
  56        $(Q)$(MAKE) $(submake_extras) -C ../../../../tools/bpf/bpftool                        \
  57                    prefix= OUTPUT=$(abs_out)/ DESTDIR=$(abs_out) install
  58