fs/common.mk

   1 #
   2 # Macro that builds the needed Makefile target to create a root
   3 # filesystem image.
   4 #
   5 # The following variable must be defined before calling this macro
   6 #
   7 #  ROOTFS_$(FSTYPE)_CMD, the command that generates the root
   8 #  filesystem image. A single command is allowed. The filename of the
   9 #  filesystem image that it must generate is $$@.
  10 #
  11 # The following variables can optionaly be defined
  12 #
  13 #  ROOTFS_$(FSTYPE)_DEPENDENCIES, the list of dependencies needed to
  14 #  build the root filesystem (usually host tools)
  15 #
  16 #  ROOTFS_$(FSTYPE)_PRE_GEN_HOOKS, a list of hooks to call before
  17 #  generating the filesystem image
  18 #
  19 #  ROOTFS_$(FSTYPE)_POST_TARGETS, the list of targets that should be
  20 #  run after running the main filesystem target. This is useful for
  21 #  initramfs, to rebuild the kernel once the initramfs is generated.
  22 #
  23 # In terms of configuration option, this macro assumes that the
  24 # BR2_TARGET_ROOTFS_$(FSTYPE) config option allows to enable/disable
  25 # the generation of a filesystem image of a particular type. If
  26 # configura options BR2_TARGET_ROOTFS_$(FSTYPE)_GZIP,
  27 # BR2_TARGET_ROOTFS_$(FSTYPE)_BZIP2 or
  28 # BR2_TARGET_ROOTFS_$(FSTYPE)_LZMA exist and are enabled, then the
  29 # macro will automatically generate a compressed filesystem image.
  30
  31 FAKEROOT_SCRIPT = $(BUILD_DIR)/_fakeroot.fs
  32 FULL_DEVICE_TABLE = $(BUILD_DIR)/_device_table.txt
  33 ROOTFS_DEVICE_TABLES = $(call qstrip,$(BR2_ROOTFS_DEVICE_TABLE) \
  34         $(BR2_ROOTFS_STATIC_DEVICE_TABLE))
  35 USERS_TABLE = $(BUILD_DIR)/_users_table.txt
  36 ROOTFS_USERS_TABLES = $(call qstrip,$(BR2_ROOTFS_USERS_TABLES))
  37
  38 # Since this function will be called from within an $(eval ...)
  39 # all variable references except the arguments must be $$-quoted.
  40 define ROOTFS_TARGET_INTERNAL
  41
  42 # extra deps
  43 ROOTFS_$(2)_DEPENDENCIES += host-fakeroot host-makedevs \
  44         $$(if $$(PACKAGES_USERS),host-mkpasswd)
  45
  46 ifeq ($$(BR2_TARGET_ROOTFS_$(2)_GZIP),y)
  47 ROOTFS_$(2)_COMPRESS_EXT = .gz
  48 ROOTFS_$(2)_COMPRESS_CMD = gzip -9 -c
  49 endif
  50 ifeq ($$(BR2_TARGET_ROOTFS_$(2)_BZIP2),y)
  51 ROOTFS_$(2)_COMPRESS_EXT = .bz2
  52 ROOTFS_$(2)_COMPRESS_CMD = bzip2 -9 -c
  53 endif
  54 ifeq ($$(BR2_TARGET_ROOTFS_$(2)_LZMA),y)
  55 ROOTFS_$(2)_DEPENDENCIES += host-lzma
  56 ROOTFS_$(2)_COMPRESS_EXT = .lzma
  57 ROOTFS_$(2)_COMPRESS_CMD = $$(LZMA) -9 -c
  58 endif
  59 ifeq ($$(BR2_TARGET_ROOTFS_$(2)_LZO),y)
  60 ROOTFS_$(2)_DEPENDENCIES += host-lzop
  61 ROOTFS_$(2)_COMPRESS_EXT = .lzo
  62 ROOTFS_$(2)_COMPRESS_CMD = $$(LZOP) -9 -c
  63 endif
  64 ifeq ($$(BR2_TARGET_ROOTFS_$(2)_XZ),y)
  65 ROOTFS_$(2)_COMPRESS_EXT = .xz
  66 ROOTFS_$(2)_COMPRESS_CMD = xz -9 -C crc32 -c
  67 endif
  68
  69 $$(BINARIES_DIR)/rootfs.$(1): target-finalize $$(ROOTFS_$(2)_DEPENDENCIES)
  70         @$$(call MESSAGE,"Generating root filesystem image rootfs.$(1)")
  71         $$(foreach hook,$$(ROOTFS_$(2)_PRE_GEN_HOOKS),$$(call $$(hook))$$(sep))
  72         rm -f $$(FAKEROOT_SCRIPT)
  73         rm -f $$(TARGET_DIR_WARNING_FILE)
  74         rm -f $$(USERS_TABLE)
  75         echo "chown -h -R 0:0 $$(TARGET_DIR)" >> $$(FAKEROOT_SCRIPT)
  76 ifneq ($$(ROOTFS_DEVICE_TABLES),)
  77         cat $$(ROOTFS_DEVICE_TABLES) > $$(FULL_DEVICE_TABLE)
  78 ifeq ($$(BR2_ROOTFS_DEVICE_CREATION_STATIC),y)
  79         printf '$$(subst $$(sep),\n,$$(PACKAGES_DEVICES_TABLE))' >> $$(FULL_DEVICE_TABLE)
  80 endif
  81         printf '$$(subst $$(sep),\n,$$(PACKAGES_PERMISSIONS_TABLE))' >> $$(FULL_DEVICE_TABLE)
  82         echo "$$(HOST_DIR)/usr/bin/makedevs -d $$(FULL_DEVICE_TABLE) $$(TARGET_DIR)" >> $$(FAKEROOT_SCRIPT)
  83 endif
  84 ifneq ($$(ROOTFS_USERS_TABLES),)
  85         cat $$(ROOTFS_USERS_TABLES) >> $$(USERS_TABLE)
  86 endif
  87         printf '$$(subst $$(sep),\n,$$(PACKAGES_USERS))' >> $$(USERS_TABLE)
  88         PATH=$$(BR_PATH) $$(TOPDIR)/support/scripts/mkusers $$(USERS_TABLE) $$(TARGET_DIR) >> $$(FAKEROOT_SCRIPT)
  89         echo "$$(ROOTFS_$(2)_CMD)" >> $$(FAKEROOT_SCRIPT)
  90         chmod a+x $$(FAKEROOT_SCRIPT)
  91         PATH=$$(BR_PATH) $$(HOST_DIR)/usr/bin/fakeroot -- $$(FAKEROOT_SCRIPT)
  92         $$(INSTALL) -m 0644 support/misc/target-dir-warning.txt $$(TARGET_DIR_WARNING_FILE)
  93         -@rm -f $$(FAKEROOT_SCRIPT) $$(FULL_DEVICE_TABLE)
  94 ifneq ($$(ROOTFS_$(2)_COMPRESS_CMD),)
  95         PATH=$$(BR_PATH) $$(ROOTFS_$(2)_COMPRESS_CMD) $$@ > $$@$$(ROOTFS_$(2)_COMPRESS_EXT)
  96 endif
  97
  98 rootfs-$(1)-show-depends:
  99         @echo $$(ROOTFS_$(2)_DEPENDENCIES)
 100
 101 rootfs-$(1): $$(BINARIES_DIR)/rootfs.$(1) $$(ROOTFS_$(2)_POST_TARGETS)
 102
 103 ifeq ($$(BR2_TARGET_ROOTFS_$(2)),y)
 104 TARGETS_ROOTFS += rootfs-$(1)
 105 endif
 106 endef
 107
 108 define ROOTFS_TARGET
 109         $(call ROOTFS_TARGET_INTERNAL,$(1),$(call UPPERCASE,$(1)))
 110 endef
 111
 112 include $(sort $(wildcard fs/*/*.mk))