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 $$@.
  10 #
  11 # The following variables can optionaly be defined
  12 #
  13 #  ROOTFS_$(FSTYPE)_DEPENDENCIES, the list of dependencies needed to
  14 #  build the root filesystem (usually host tools)
  15 #
  16 #  ROOTFS_$(FSTYPE)_PRE_GEN_HOOKS, a list of hooks to call before
  17 #  generating the filesystem image
  18 #
  19 #  ROOTFS_$(FSTYPE)_POST_GEN_HOOKS, a list of hooks to call after
  20 #  generating the filesystem image
  21 #
  22 #  ROOTFS_$(FSTYPE)_POST_TARGETS, the list of targets that should be
  23 #  run after running the main filesystem target. This is useful for
  24 #  initramfs, to rebuild the kernel once the initramfs is generated.
  25 #
  26 # In terms of configuration option, this macro assumes that the
  27 # BR2_TARGET_ROOTFS_$(FSTYPE) config option allows to enable/disable
  28 # the generation of a filesystem image of a particular type. If
  29 # the configuration options BR2_TARGET_ROOTFS_$(FSTYPE)_GZIP,
  30 # BR2_TARGET_ROOTFS_$(FSTYPE)_BZIP2 or
  31 # BR2_TARGET_ROOTFS_$(FSTYPE)_LZMA exist and are enabled, then the
  32 # macro will automatically generate a compressed filesystem image.
  33
  34 FAKEROOT_SCRIPT = $(BUILD_DIR)/_fakeroot.fs
  35 FULL_DEVICE_TABLE = $(BUILD_DIR)/_device_table.txt
  36 ROOTFS_DEVICE_TABLES = $(call qstrip,$(BR2_ROOTFS_DEVICE_TABLE) \
  37         $(BR2_ROOTFS_STATIC_DEVICE_TABLE))
  38 USERS_TABLE = $(BUILD_DIR)/_users_table.txt
  39 ROOTFS_USERS_TABLES = $(call qstrip,$(BR2_ROOTFS_USERS_TABLES))
  40
  41 # Since this function will be called from within an $(eval ...)
  42 # all variable references except the arguments must be $$-quoted.
  43 define ROOTFS_TARGET_INTERNAL
  44
  45 # extra deps
  46 ROOTFS_$(2)_DEPENDENCIES += host-fakeroot host-makedevs \
  47         $$(if $$(PACKAGES_USERS)$$(ROOTFS_USERS_TABLES),host-mkpasswd)
  48
  49 ifeq ($$(BR2_TARGET_ROOTFS_$(2)_GZIP),y)
  50 ROOTFS_$(2)_COMPRESS_EXT = .gz
  51 ROOTFS_$(2)_COMPRESS_CMD = gzip -9 -c
  52 endif
  53 ifeq ($$(BR2_TARGET_ROOTFS_$(2)_BZIP2),y)
  54 ROOTFS_$(2)_COMPRESS_EXT = .bz2
  55 ROOTFS_$(2)_COMPRESS_CMD = bzip2 -9 -c
  56 endif
  57 ifeq ($$(BR2_TARGET_ROOTFS_$(2)_LZMA),y)
  58 ROOTFS_$(2)_DEPENDENCIES += host-lzma
  59 ROOTFS_$(2)_COMPRESS_EXT = .lzma
  60 ROOTFS_$(2)_COMPRESS_CMD = $$(LZMA) -9 -c
  61 endif
  62 ifeq ($$(BR2_TARGET_ROOTFS_$(2)_LZO),y)
  63 ROOTFS_$(2)_DEPENDENCIES += host-lzop
  64 ROOTFS_$(2)_COMPRESS_EXT = .lzo
  65 ROOTFS_$(2)_COMPRESS_CMD = $$(LZOP) -9 -c
  66 endif
  67 ifeq ($$(BR2_TARGET_ROOTFS_$(2)_XZ),y)
  68 ROOTFS_$(2)_DEPENDENCIES += host-xz
  69 ROOTFS_$(2)_COMPRESS_EXT = .xz
  70 ROOTFS_$(2)_COMPRESS_CMD = xz -9 -C crc32 -c
  71 endif
  72
  73 $$(BINARIES_DIR)/rootfs.$(1): target-finalize $$(ROOTFS_$(2)_DEPENDENCIES)
  74         @$$(call MESSAGE,"Generating root filesystem image rootfs.$(1)")
  75         $$(foreach hook,$$(ROOTFS_$(2)_PRE_GEN_HOOKS),$$(call $$(hook))$$(sep))
  76         rm -f $$(FAKEROOT_SCRIPT)
  77         rm -f $$(TARGET_DIR_WARNING_FILE)
  78         rm -f $$(USERS_TABLE)
  79         echo "set -e" >> $$(FAKEROOT_SCRIPT)
  80         echo "chown -h -R 0:0 $$(TARGET_DIR)" >> $$(FAKEROOT_SCRIPT)
  81 ifneq ($$(ROOTFS_USERS_TABLES),)
  82         cat $$(ROOTFS_USERS_TABLES) >> $$(USERS_TABLE)
  83 endif
  84         printf '$$(subst $$(sep),\n,$$(PACKAGES_USERS))' >> $$(USERS_TABLE)
  85         PATH=$$(BR_PATH) $$(TOPDIR)/support/scripts/mkusers $$(USERS_TABLE) $$(TARGET_DIR) >> $$(FAKEROOT_SCRIPT)
  86 ifneq ($$(ROOTFS_DEVICE_TABLES),)
  87         cat $$(ROOTFS_DEVICE_TABLES) > $$(FULL_DEVICE_TABLE)
  88 ifeq ($$(BR2_ROOTFS_DEVICE_CREATION_STATIC),y)
  89         printf '$$(subst $$(sep),\n,$$(PACKAGES_DEVICES_TABLE))' >> $$(FULL_DEVICE_TABLE)
  90 endif
  91         printf '$$(subst $$(sep),\n,$$(PACKAGES_PERMISSIONS_TABLE))' >> $$(FULL_DEVICE_TABLE)
  92         echo "$$(HOST_DIR)/usr/bin/makedevs -d $$(FULL_DEVICE_TABLE) $$(TARGET_DIR)" >> $$(FAKEROOT_SCRIPT)
  93 endif
  94         echo "$$(ROOTFS_$(2)_CMD)" >> $$(FAKEROOT_SCRIPT)
  95         chmod a+x $$(FAKEROOT_SCRIPT)
  96         PATH=$$(BR_PATH) $$(HOST_DIR)/usr/bin/fakeroot -- $$(FAKEROOT_SCRIPT)
  97         $$(INSTALL) -m 0644 support/misc/target-dir-warning.txt $$(TARGET_DIR_WARNING_FILE)
  98         -@rm -f $$(FAKEROOT_SCRIPT) $$(FULL_DEVICE_TABLE)
  99 ifneq ($$(ROOTFS_$(2)_COMPRESS_CMD),)
 100         PATH=$$(BR_PATH) $$(ROOTFS_$(2)_COMPRESS_CMD) $$@ > $$@$$(ROOTFS_$(2)_COMPRESS_EXT)
 101 endif
 102         $$(foreach hook,$$(ROOTFS_$(2)_POST_GEN_HOOKS),$$(call $$(hook))$$(sep))
 103
 104 rootfs-$(1)-show-depends:
 105         @echo $$(ROOTFS_$(2)_DEPENDENCIES)
 106
 107 rootfs-$(1): $$(BINARIES_DIR)/rootfs.$(1) $$(ROOTFS_$(2)_POST_TARGETS)
 108
 109 .PHONY: rootfs-$(1) rootfs-$(1)-show-depends
 110
 111 ifeq ($$(BR2_TARGET_ROOTFS_$(2)),y)
 112 TARGETS_ROOTFS += rootfs-$(1)
 113 PACKAGES += $$(filter-out rootfs-%,$$(ROOTFS_$(2)_DEPENDENCIES))
 114 endif
 115 endef
 116
 117 define ROOTFS_TARGET
 118         $(call ROOTFS_TARGET_INTERNAL,$(1),$(call UPPERCASE,$(1)))
 119 endef
 120
 121 include $(sort $(wildcard fs/*/*.mk))