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