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 $$(USERS_TABLE)
  79         echo '#!/bin/sh' > $$(FAKEROOT_SCRIPT)
  80         echo "set -e" >> $$(FAKEROOT_SCRIPT)
  81         echo "chown -h -R 0:0 $$(TARGET_DIR)" >> $$(FAKEROOT_SCRIPT)
  82 ifneq ($$(ROOTFS_USERS_TABLES),)
  83         cat $$(ROOTFS_USERS_TABLES) >> $$(USERS_TABLE)
  84 endif
  85         $$(call PRINTF,$$(PACKAGES_USERS)) >> $$(USERS_TABLE)
  86         PATH=$$(BR_PATH) $$(TOPDIR)/support/scripts/mkusers $$(USERS_TABLE) $$(TARGET_DIR) >> $$(FAKEROOT_SCRIPT)
  87 ifneq ($$(ROOTFS_DEVICE_TABLES),)
  88         cat $$(ROOTFS_DEVICE_TABLES) > $$(FULL_DEVICE_TABLE)
  89 ifeq ($$(BR2_ROOTFS_DEVICE_CREATION_STATIC),y)
  90         $$(call PRINTF,$$(PACKAGES_DEVICES_TABLE)) >> $$(FULL_DEVICE_TABLE)
  91 endif
  92 endif
  93         $$(call PRINTF,$$(PACKAGES_PERMISSIONS_TABLE)) >> $$(FULL_DEVICE_TABLE)
  94         echo "$$(HOST_DIR)/bin/makedevs -d $$(FULL_DEVICE_TABLE) $$(TARGET_DIR)" >> $$(FAKEROOT_SCRIPT)
  95         $$(foreach s,$$(call qstrip,$$(BR2_ROOTFS_POST_FAKEROOT_SCRIPT)),\
  96                 echo "echo '$$(TERM_BOLD)>>>   Executing fakeroot script $$(s)$$(TERM_RESET)'" >> $$(FAKEROOT_SCRIPT); \
  97                 echo $$(s) $$(TARGET_DIR) $$(BR2_ROOTFS_POST_SCRIPT_ARGS) >> $$(FAKEROOT_SCRIPT)$$(sep))
  98         $$(foreach hook,$$(ROOTFS_PRE_CMD_HOOKS),\
  99                 $$(call PRINTF,$$($$(hook))) >> $$(FAKEROOT_SCRIPT)$$(sep))
 100 ifeq ($$(BR2_REPRODUCIBLE),y)
 101         echo "find $$(TARGET_DIR) -print0 | xargs -0 -r touch -hd @$$(SOURCE_DATE_EPOCH)" >> $$(FAKEROOT_SCRIPT)
 102 endif
 103         $$(call PRINTF,$$(ROOTFS_$(2)_CMD)) >> $$(FAKEROOT_SCRIPT)
 104         $$(foreach hook,$$(ROOTFS_POST_CMD_HOOKS),\
 105                 $$(call PRINTF,$$($$(hook))) >> $$(FAKEROOT_SCRIPT)$$(sep))
 106         chmod a+x $$(FAKEROOT_SCRIPT)
 107         PATH=$$(BR_PATH) $$(HOST_DIR)/bin/fakeroot -- $$(FAKEROOT_SCRIPT)
 108         $$(INSTALL) -m 0644 support/misc/target-dir-warning.txt $$(TARGET_DIR_WARNING_FILE)
 109         -@rm -f $$(FAKEROOT_SCRIPT) $$(FULL_DEVICE_TABLE)
 110 ifneq ($$(ROOTFS_$(2)_COMPRESS_CMD),)
 111         PATH=$$(BR_PATH) $$(ROOTFS_$(2)_COMPRESS_CMD) $$@ > $$@$$(ROOTFS_$(2)_COMPRESS_EXT)
 112 endif
 113         $$(foreach hook,$$(ROOTFS_$(2)_POST_GEN_HOOKS),$$(call $$(hook))$$(sep))
 114
 115 rootfs-$(1)-show-depends:
 116         @echo $$(ROOTFS_$(2)_DEPENDENCIES)
 117
 118 rootfs-$(1): $$(BINARIES_DIR)/rootfs.$(1) $$(ROOTFS_$(2)_POST_TARGETS)
 119
 120 .PHONY: rootfs-$(1) rootfs-$(1)-show-depends
 121
 122 ifeq ($$(BR2_TARGET_ROOTFS_$(2)),y)
 123 TARGETS_ROOTFS += rootfs-$(1)
 124 PACKAGES += $$(filter-out rootfs-%,$$(ROOTFS_$(2)_DEPENDENCIES))
 125 endif
 126 endef
 127
 128 define ROOTFS_TARGET
 129         $(call ROOTFS_TARGET_INTERNAL,$(1),$(call UPPERCASE,$(1)))
 130 endef
 131
 132 include $(sort $(wildcard fs/*/*.mk))