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