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 $$@.
  10 #
  11 # The following variables can optionaly be defined
  12 #
  13 #  ROOTFS_$(FSTYPE)_DEPENDENCIES, the list of dependencies needed to
  14 #  build the root filesystem (usually host tools)
  15 #
  16 #  ROOTFS_$(FSTYPE)_PRE_GEN_HOOKS, a list of hooks to call before
  17 #  generating the filesystem image
  18 #
  19 #  ROOTFS_$(FSTYPE)_POST_GEN_HOOKS, a list of hooks to call after
  20 #  generating the filesystem image
  21 #
  22 # In terms of configuration option, this macro assumes that the
  23 # BR2_TARGET_ROOTFS_$(FSTYPE) config option allows to enable/disable
  24 # the generation of a filesystem image of a particular type. If
  25 # the configuration options BR2_TARGET_ROOTFS_$(FSTYPE)_GZIP,
  26 # BR2_TARGET_ROOTFS_$(FSTYPE)_BZIP2 or
  27 # BR2_TARGET_ROOTFS_$(FSTYPE)_LZMA exist and are enabled, then the
  28 # macro will automatically generate a compressed filesystem image.
  29
  30 FS_DIR = $(BUILD_DIR)/buildroot-fs
  31 FULL_DEVICE_TABLE = $(FS_DIR)/device_table.txt
  32 ROOTFS_DEVICE_TABLES = $(call qstrip,$(BR2_ROOTFS_DEVICE_TABLE) \
  33         $(BR2_ROOTFS_STATIC_DEVICE_TABLE))
  34 USERS_TABLE = $(FS_DIR)/users_table.txt
  35 ROOTFS_USERS_TABLES = $(call qstrip,$(BR2_ROOTFS_USERS_TABLES))
  36
  37 # Since this function will be called from within an $(eval ...)
  38 # all variable references except the arguments must be $$-quoted.
  39 define inner-rootfs
  40
  41 ROOTFS_$(2)_DIR = $$(FS_DIR)/$(1)
  42
  43 # extra deps
  44 ROOTFS_$(2)_DEPENDENCIES += host-fakeroot host-makedevs \
  45         $$(if $$(PACKAGES_USERS)$$(ROOTFS_USERS_TABLES),host-mkpasswd)
  46
  47 ifeq ($$(BR2_TARGET_ROOTFS_$(2)_GZIP),y)
  48 ROOTFS_$(2)_COMPRESS_EXT = .gz
  49 ROOTFS_$(2)_COMPRESS_CMD = gzip -9 -c
  50 endif
  51 ifeq ($$(BR2_TARGET_ROOTFS_$(2)_BZIP2),y)
  52 ROOTFS_$(2)_COMPRESS_EXT = .bz2
  53 ROOTFS_$(2)_COMPRESS_CMD = bzip2 -9 -c
  54 endif
  55 ifeq ($$(BR2_TARGET_ROOTFS_$(2)_LZMA),y)
  56 ROOTFS_$(2)_DEPENDENCIES += host-lzma
  57 ROOTFS_$(2)_COMPRESS_EXT = .lzma
  58 ROOTFS_$(2)_COMPRESS_CMD = $$(LZMA) -9 -c
  59 endif
  60 ifeq ($$(BR2_TARGET_ROOTFS_$(2)_LZ4),y)
  61 ROOTFS_$(2)_DEPENDENCIES += host-lz4
  62 ROOTFS_$(2)_COMPRESS_EXT = .lz4
  63 ROOTFS_$(2)_COMPRESS_CMD = lz4 -l -9 -c
  64 endif
  65 ifeq ($$(BR2_TARGET_ROOTFS_$(2)_LZO),y)
  66 ROOTFS_$(2)_DEPENDENCIES += host-lzop
  67 ROOTFS_$(2)_COMPRESS_EXT = .lzo
  68 ROOTFS_$(2)_COMPRESS_CMD = $$(LZOP) -9 -c
  69 endif
  70 ifeq ($$(BR2_TARGET_ROOTFS_$(2)_XZ),y)
  71 ROOTFS_$(2)_DEPENDENCIES += host-xz
  72 ROOTFS_$(2)_COMPRESS_EXT = .xz
  73 ROOTFS_$(2)_COMPRESS_CMD = xz -9 -C crc32 -c
  74 endif
  75
  76 $$(BINARIES_DIR)/rootfs.$(1): ROOTFS=$(2)
  77 $$(BINARIES_DIR)/rootfs.$(1): FAKEROOT_SCRIPT=$$(ROOTFS_$(2)_DIR)/fakeroot
  78 $$(BINARIES_DIR)/rootfs.$(1): target-finalize $$(ROOTFS_$(2)_DEPENDENCIES)
  79         @$$(call MESSAGE,"Generating root filesystem image rootfs.$(1)")
  80         rm -rf $(FS_DIR) $$(ROOTFS_$(2)_DIR)
  81         mkdir -p $(FS_DIR) $$(ROOTFS_$(2)_DIR)
  82         echo '#!/bin/sh' > $$(FAKEROOT_SCRIPT)
  83         echo "set -e" >> $$(FAKEROOT_SCRIPT)
  84         $$(foreach hook,$$(ROOTFS_$(2)_PRE_GEN_HOOKS),\
  85                 $$(call PRINTF,$$($$(hook))) >> $$(FAKEROOT_SCRIPT)$$(sep))
  86         echo "chown -h -R 0:0 $$(TARGET_DIR)" >> $$(FAKEROOT_SCRIPT)
  87 ifneq ($$(ROOTFS_USERS_TABLES),)
  88         cat $$(ROOTFS_USERS_TABLES) >> $$(USERS_TABLE)
  89 endif
  90         $$(call PRINTF,$$(PACKAGES_USERS)) >> $$(USERS_TABLE)
  91         PATH=$$(BR_PATH) $$(TOPDIR)/support/scripts/mkusers $$(USERS_TABLE) $$(TARGET_DIR) >> $$(FAKEROOT_SCRIPT)
  92 ifneq ($$(ROOTFS_DEVICE_TABLES),)
  93         cat $$(ROOTFS_DEVICE_TABLES) > $$(FULL_DEVICE_TABLE)
  94 ifeq ($$(BR2_ROOTFS_DEVICE_CREATION_STATIC),y)
  95         $$(call PRINTF,$$(PACKAGES_DEVICES_TABLE)) >> $$(FULL_DEVICE_TABLE)
  96 endif
  97 endif
  98         $$(call PRINTF,$$(PACKAGES_PERMISSIONS_TABLE)) >> $$(FULL_DEVICE_TABLE)
  99         echo "$$(HOST_DIR)/bin/makedevs -d $$(FULL_DEVICE_TABLE) $$(TARGET_DIR)" >> $$(FAKEROOT_SCRIPT)
 100         $$(foreach s,$$(call qstrip,$$(BR2_ROOTFS_POST_FAKEROOT_SCRIPT)),\
 101                 echo "echo '$$(TERM_BOLD)>>>   Executing fakeroot script $$(s)$$(TERM_RESET)'" >> $$(FAKEROOT_SCRIPT); \
 102                 echo $$(EXTRA_ENV) $$(s) $$(TARGET_DIR) $$(BR2_ROOTFS_POST_SCRIPT_ARGS) >> $$(FAKEROOT_SCRIPT)$$(sep))
 103         $$(foreach hook,$$(ROOTFS_PRE_CMD_HOOKS),\
 104                 $$(call PRINTF,$$($$(hook))) >> $$(FAKEROOT_SCRIPT)$$(sep))
 105 ifeq ($$(BR2_REPRODUCIBLE),y)
 106         echo "find $$(TARGET_DIR) -print0 | xargs -0 -r touch -hd @$$(SOURCE_DATE_EPOCH)" >> $$(FAKEROOT_SCRIPT)
 107 endif
 108         $$(call PRINTF,$$(ROOTFS_$(2)_CMD)) >> $$(FAKEROOT_SCRIPT)
 109         $$(foreach hook,$$(ROOTFS_POST_CMD_HOOKS),\
 110                 $$(call PRINTF,$$($$(hook))) >> $$(FAKEROOT_SCRIPT)$$(sep))
 111         chmod a+x $$(FAKEROOT_SCRIPT)
 112         rm -f $$(TARGET_DIR_WARNING_FILE)
 113         PATH=$$(BR_PATH) $$(HOST_DIR)/bin/fakeroot -- $$(FAKEROOT_SCRIPT)
 114         $$(INSTALL) -m 0644 support/misc/target-dir-warning.txt $$(TARGET_DIR_WARNING_FILE)
 115 ifneq ($$(ROOTFS_$(2)_COMPRESS_CMD),)
 116         PATH=$$(BR_PATH) $$(ROOTFS_$(2)_COMPRESS_CMD) $$@ > $$@$$(ROOTFS_$(2)_COMPRESS_EXT)
 117 endif
 118         $$(foreach hook,$$(ROOTFS_$(2)_POST_GEN_HOOKS),$$(call $$(hook))$$(sep))
 119
 120 rootfs-$(1)-show-depends:
 121         @echo $$(ROOTFS_$(2)_DEPENDENCIES)
 122
 123 rootfs-$(1): $$(BINARIES_DIR)/rootfs.$(1)
 124
 125 .PHONY: rootfs-$(1) rootfs-$(1)-show-depends
 126
 127 ifeq ($$(BR2_TARGET_ROOTFS_$(2)),y)
 128 TARGETS_ROOTFS += rootfs-$(1)
 129 PACKAGES += $$(filter-out rootfs-%,$$(ROOTFS_$(2)_DEPENDENCIES))
 130 endif
 131
 132 # Check for legacy POST_TARGETS rules
 133 ifneq ($$(ROOTFS_$(2)_POST_TARGETS),)
 134 $$(error Filesystem $(1) uses post-target rules, which are no longer supported.\
 135         Update $(1) to use post-gen hooks instead)
 136 endif
 137
 138 endef
 139
 140 # $(pkgname) also works well to return the filesystem name
 141 rootfs = $(call inner-rootfs,$(pkgname),$(call UPPERCASE,$(pkgname)))
 142
 143 include $(sort $(wildcard fs/*/*.mk))