tools/bpf/resolve_btfids/Makefile

   1 # SPDX-License-Identifier: GPL-2.0-only
   2 include ../../scripts/Makefile.include
   3 include ../../scripts/Makefile.arch
   4
   5 srctree := $(abspath $(CURDIR)/../../../)
   6
   7 ifeq ($(V),1)
   8   Q =
   9   msg =
  10 else
  11   Q = @
  12   ifeq ($(silent),1)
  13     msg =
  14   else
  15     msg = @printf '  %-8s %s%s\n' "$(1)" "$(notdir $(2))" "$(if $(3), $(3))";
  16   endif
  17   MAKEFLAGS=--no-print-directory
  18 endif
  19
  20 # Overrides for the prepare step libraries.
  21 HOST_OVERRIDES := AR="$(HOSTAR)" CC="$(HOSTCC)" LD="$(HOSTLD)" ARCH="$(HOSTARCH)" \
  22                   CROSS_COMPILE="" EXTRA_CFLAGS="$(HOSTCFLAGS)"
  23
  24 RM      ?= rm
  25 HOSTCC  ?= gcc
  26 HOSTLD  ?= ld
  27 HOSTAR  ?= ar
  28 CROSS_COMPILE =
  29
  30 OUTPUT ?= $(srctree)/tools/bpf/resolve_btfids/
  31
  32 LIBBPF_SRC := $(srctree)/tools/lib/bpf/
  33 SUBCMD_SRC := $(srctree)/tools/lib/subcmd/
  34
  35 BPFOBJ     := $(OUTPUT)/libbpf/libbpf.a
  36 LIBBPF_OUT := $(abspath $(dir $(BPFOBJ)))/
  37 SUBCMDOBJ  := $(OUTPUT)/libsubcmd/libsubcmd.a
  38 SUBCMD_OUT := $(abspath $(dir $(SUBCMDOBJ)))/
  39
  40 LIBBPF_DESTDIR := $(LIBBPF_OUT)
  41 LIBBPF_INCLUDE := $(LIBBPF_DESTDIR)include
  42
  43 SUBCMD_DESTDIR := $(SUBCMD_OUT)
  44 SUBCMD_INCLUDE := $(SUBCMD_DESTDIR)include
  45
  46 BINARY     := $(OUTPUT)/resolve_btfids
  47 BINARY_IN  := $(BINARY)-in.o
  48
  49 all: $(BINARY)
  50
  51 prepare: $(BPFOBJ) $(SUBCMDOBJ)
  52
  53 $(OUTPUT) $(OUTPUT)/libsubcmd $(LIBBPF_OUT):
  54         $(call msg,MKDIR,,$@)
  55         $(Q)mkdir -p $(@)
  56
  57 $(SUBCMDOBJ): fixdep FORCE | $(OUTPUT)/libsubcmd
  58         $(Q)$(MAKE) -C $(SUBCMD_SRC) OUTPUT=$(SUBCMD_OUT) \
  59                     DESTDIR=$(SUBCMD_DESTDIR) $(HOST_OVERRIDES) prefix= subdir= \
  60                     $(abspath $@) install_headers
  61
  62 $(BPFOBJ): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(LIBBPF_OUT)
  63         $(Q)$(MAKE) $(submake_extras) -C $(LIBBPF_SRC) OUTPUT=$(LIBBPF_OUT)    \
  64                     DESTDIR=$(LIBBPF_DESTDIR) $(HOST_OVERRIDES) prefix= subdir= \
  65                     $(abspath $@) install_headers
  66
  67 LIBELF_FLAGS := $(shell $(HOSTPKG_CONFIG) libelf --cflags 2>/dev/null)
  68 LIBELF_LIBS  := $(shell $(HOSTPKG_CONFIG) libelf --libs 2>/dev/null || echo -lelf)
  69
  70 HOSTCFLAGS_resolve_btfids += -g \
  71           -I$(srctree)/tools/include \
  72           -I$(srctree)/tools/include/uapi \
  73           -I$(LIBBPF_INCLUDE) \
  74           -I$(SUBCMD_INCLUDE) \
  75           $(LIBELF_FLAGS)
  76
  77 LIBS = $(LIBELF_LIBS) -lz
  78
  79 export srctree OUTPUT HOSTCFLAGS_resolve_btfids Q HOSTCC HOSTLD HOSTAR
  80 include $(srctree)/tools/build/Makefile.include
  81
  82 $(BINARY_IN): fixdep FORCE prepare | $(OUTPUT)
  83         $(Q)$(MAKE) $(build)=resolve_btfids
  84
  85 $(BINARY): $(BPFOBJ) $(SUBCMDOBJ) $(BINARY_IN)
  86         $(call msg,LINK,$@)
  87         $(Q)$(HOSTCC) $(BINARY_IN) $(KBUILD_HOSTLDFLAGS) -o $@ $(BPFOBJ) $(SUBCMDOBJ) $(LIBS)
  88
  89 clean_objects := $(wildcard $(OUTPUT)/*.o                \
  90                             $(OUTPUT)/.*.o.cmd           \
  91                             $(OUTPUT)/.*.o.d             \
  92                             $(LIBBPF_OUT)                \
  93                             $(LIBBPF_DESTDIR)            \
  94                             $(SUBCMD_OUT)                \
  95                             $(SUBCMD_DESTDIR)            \
  96                             $(OUTPUT)/resolve_btfids)
  97
  98 ifneq ($(clean_objects),)
  99 clean: fixdep-clean
 100         $(call msg,CLEAN,$(BINARY))
 101         $(Q)$(RM) -rf $(clean_objects)
 102 else
 103 clean:
 104 endif
 105
 106 tags:
 107         $(call msg,GEN,,tags)
 108         $(Q)ctags -R . $(LIBBPF_SRC) $(SUBCMD_SRC)
 109
 110 FORCE:
 111
 112 .PHONY: all FORCE clean tags prepare