usr/Makefile

   1
   2 obj-y := initramfs_data.o
   3
   4 hostprogs-y  := gen_init_cpio
   5
   6 clean-files := initramfs_data.cpio.gz initramfs_list
   7
   8 # initramfs_data.o contains the initramfs_data.cpio.gz image.
   9 # The image is included using .incbin, a dependency which is not
  10 # tracked automatically.
  11 $(obj)/initramfs_data.o: $(obj)/initramfs_data.cpio.gz FORCE
  12
  13 ifdef CONFIG_INITRAMFS_ROOT_UID
  14 gen_initramfs_args += -u $(CONFIG_INITRAMFS_ROOT_UID)
  15 endif
  16
  17 ifdef CONFIG_INITRAMFS_ROOT_GID
  18 gen_initramfs_args += -g $(CONFIG_INITRAMFS_ROOT_GID)
  19 endif
  20
  21 # The $(shell echo $(CONFIG_INITRAMFS_SOURCE)) is to remove the
  22 # gratuitous begin and end quotes from the Kconfig string type.
  23 # Internal, escaped quotes in the Kconfig string will loose the
  24 # escape and become active quotes.
  25 quotefixed_initramfs_source := $(shell echo $(CONFIG_INITRAMFS_SOURCE))
  26
  27 filechk_initramfs_list = $(CONFIG_SHELL) \
  28  $(srctree)/scripts/gen_initramfs_list.sh $(gen_initramfs_args) $(quotefixed_initramfs_source)
  29
  30 $(obj)/initramfs_list: FORCE
  31         $(call filechk,initramfs_list)
  32
  33 quiet_cmd_cpio = CPIO    $@
  34       cmd_cpio = ./$< $(obj)/initramfs_list > $@
  35
  36
  37 # Check if the INITRAMFS_SOURCE is a cpio archive
  38 ifneq (,$(findstring .cpio,$(quotefixed_initramfs_source)))
  39
  40 # INITRAMFS_SOURCE has a cpio archive - verify that it's a single file
  41 ifneq (1,$(words $(quotefixed_initramfs_source)))
  42 $(error Only a single file may be specified in CONFIG_INITRAMFS_SOURCE (="$(quotefixed_initramfs_source)") when a cpio archive is directly specified.)
  43 endif
  44 # Now use the cpio archive directly
  45 initramfs_data_cpio = $(quotefixed_initramfs_source)
  46 targets += $(quotefixed_initramfs_source)
  47
  48 else
  49
  50 # INITRAMFS_SOURCE is not a cpio archive - create one
  51 $(obj)/initramfs_data.cpio: $(obj)/gen_init_cpio \
  52                             $(initramfs-y) $(obj)/initramfs_list FORCE
  53         $(call if_changed,cpio)
  54
  55 targets += initramfs_data.cpio
  56 initramfs_data_cpio = $(obj)/initramfs_data.cpio
  57
  58 endif
  59
  60
  61 $(obj)/initramfs_data.cpio.gz: $(initramfs_data_cpio) FORCE
  62         $(call if_changed,gzip)
  63
  64 targets += initramfs_data.cpio.gz
  65