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 ifeq ($(BR2_REPRODUCIBLE),y)
  38 define ROOTFS_REPRODUCIBLE
  39         find $(TARGET_DIR) -print0 | xargs -0 -r touch -hd @$(SOURCE_DATE_EPOCH)
  40 endef
  41 endif
  42
  43 ROOTFS_COMMON_TAR = $(FS_DIR)/rootfs.common.tar
  44
  45 .PHONY: rootfs-common
  46 rootfs-common: $(ROOTFS_COMMON_TAR)
  47
  48 ROOTFS_COMMON_DEPENDENCIES = \
  49         host-fakeroot host-makedevs \
  50         $(if $(PACKAGES_USERS)$(ROOTFS_USERS_TABLES),host-mkpasswd)
  51
  52 .PHONY: $(ROOTFS_COMMON_TAR)
  53 # When doing the common tarball, we're not really doing a rootfs.
  54 $(ROOTFS_COMMON_TAR): ROOTFS=
  55 $(ROOTFS_COMMON_TAR): $(ROOTFS_COMMON_DEPENDENCIES) target-finalize
  56         @:
  57
  58 rootfs-common-show-depends:
  59         @echo $(ROOTFS_COMMON_DEPENDENCIES)
  60
  61 # Since this function will be called from within an $(eval ...)
  62 # all variable references except the arguments must be $$-quoted.
  63 define inner-rootfs
  64
  65 ROOTFS_$(2)_DIR = $$(FS_DIR)/$(1)
  66 ROOTFS_$(2)_TARGET_DIR = $$(BASE_TARGET_DIR)
  67
  68 ROOTFS_$(2)_DEPENDENCIES += rootfs-common
  69
  70 ifeq ($$(BR2_TARGET_ROOTFS_$(2)_GZIP),y)
  71 ROOTFS_$(2)_COMPRESS_EXT = .gz
  72 ROOTFS_$(2)_COMPRESS_CMD = gzip -9 -c
  73 endif
  74 ifeq ($$(BR2_TARGET_ROOTFS_$(2)_BZIP2),y)
  75 ROOTFS_$(2)_COMPRESS_EXT = .bz2
  76 ROOTFS_$(2)_COMPRESS_CMD = bzip2 -9 -c
  77 endif
  78 ifeq ($$(BR2_TARGET_ROOTFS_$(2)_LZMA),y)
  79 ROOTFS_$(2)_DEPENDENCIES += host-lzma
  80 ROOTFS_$(2)_COMPRESS_EXT = .lzma
  81 ROOTFS_$(2)_COMPRESS_CMD = $$(LZMA) -9 -c
  82 endif
  83 ifeq ($$(BR2_TARGET_ROOTFS_$(2)_LZ4),y)
  84 ROOTFS_$(2)_DEPENDENCIES += host-lz4
  85 ROOTFS_$(2)_COMPRESS_EXT = .lz4
  86 ROOTFS_$(2)_COMPRESS_CMD = lz4 -l -9 -c
  87 endif
  88 ifeq ($$(BR2_TARGET_ROOTFS_$(2)_LZO),y)
  89 ROOTFS_$(2)_DEPENDENCIES += host-lzop
  90 ROOTFS_$(2)_COMPRESS_EXT = .lzo
  91 ROOTFS_$(2)_COMPRESS_CMD = $$(LZOP) -9 -c
  92 endif
  93 ifeq ($$(BR2_TARGET_ROOTFS_$(2)_XZ),y)
  94 ROOTFS_$(2)_DEPENDENCIES += host-xz
  95 ROOTFS_$(2)_COMPRESS_EXT = .xz
  96 ROOTFS_$(2)_COMPRESS_CMD = xz -9 -C crc32 -c
  97 endif
  98
  99 $$(BINARIES_DIR)/rootfs.$(1): ROOTFS=$(2)
 100 $$(BINARIES_DIR)/rootfs.$(1): FAKEROOT_SCRIPT=$$(ROOTFS_$(2)_DIR)/fakeroot
 101 $$(BINARIES_DIR)/rootfs.$(1): $$(ROOTFS_$(2)_DEPENDENCIES)
 102         @$$(call MESSAGE,"Generating root filesystem image rootfs.$(1)")
 103         rm -rf $(FS_DIR) $$(ROOTFS_$(2)_DIR)
 104         mkdir -p $(FS_DIR) $$(ROOTFS_$(2)_DIR)
 105         echo '#!/bin/sh' > $$(FAKEROOT_SCRIPT)
 106         echo "set -e" >> $$(FAKEROOT_SCRIPT)
 107         $$(foreach hook,$$(ROOTFS_$(2)_PRE_GEN_HOOKS),\
 108                 $$(call PRINTF,$$($$(hook))) >> $$(FAKEROOT_SCRIPT)$$(sep))
 109         echo "chown -h -R 0:0 $$(TARGET_DIR)" >> $$(FAKEROOT_SCRIPT)
 110 ifneq ($$(ROOTFS_USERS_TABLES),)
 111         cat $$(ROOTFS_USERS_TABLES) >> $$(USERS_TABLE)
 112 endif
 113         $$(call PRINTF,$$(PACKAGES_USERS)) >> $$(USERS_TABLE)
 114         PATH=$$(BR_PATH) $$(TOPDIR)/support/scripts/mkusers $$(USERS_TABLE) $$(TARGET_DIR) >> $$(FAKEROOT_SCRIPT)
 115 ifneq ($$(ROOTFS_DEVICE_TABLES),)
 116         cat $$(ROOTFS_DEVICE_TABLES) > $$(FULL_DEVICE_TABLE)
 117 ifeq ($$(BR2_ROOTFS_DEVICE_CREATION_STATIC),y)
 118         $$(call PRINTF,$$(PACKAGES_DEVICES_TABLE)) >> $$(FULL_DEVICE_TABLE)
 119 endif
 120 endif
 121         $$(call PRINTF,$$(PACKAGES_PERMISSIONS_TABLE)) >> $$(FULL_DEVICE_TABLE)
 122         echo "$$(HOST_DIR)/bin/makedevs -d $$(FULL_DEVICE_TABLE) $$(TARGET_DIR)" >> $$(FAKEROOT_SCRIPT)
 123         $$(foreach s,$$(call qstrip,$$(BR2_ROOTFS_POST_FAKEROOT_SCRIPT)),\
 124                 echo "echo '$$(TERM_BOLD)>>>   Executing fakeroot script $$(s)$$(TERM_RESET)'" >> $$(FAKEROOT_SCRIPT); \
 125                 echo $$(EXTRA_ENV) $$(s) $$(TARGET_DIR) $$(BR2_ROOTFS_POST_SCRIPT_ARGS) >> $$(FAKEROOT_SCRIPT)$$(sep))
 126         $$(foreach hook,$$(ROOTFS_PRE_CMD_HOOKS),\
 127                 $$(call PRINTF,$$($$(hook))) >> $$(FAKEROOT_SCRIPT)$$(sep))
 128         $$(call PRINTF,$$(ROOTFS_REPRODUCIBLE)) >> $$(FAKEROOT_SCRIPT)
 129         $$(call PRINTF,$$(ROOTFS_$(2)_CMD)) >> $$(FAKEROOT_SCRIPT)
 130         $$(foreach hook,$$(ROOTFS_POST_CMD_HOOKS),\
 131                 $$(call PRINTF,$$($$(hook))) >> $$(FAKEROOT_SCRIPT)$$(sep))
 132         chmod a+x $$(FAKEROOT_SCRIPT)
 133         rm -f $$(TARGET_DIR_WARNING_FILE)
 134         PATH=$$(BR_PATH) $$(HOST_DIR)/bin/fakeroot -- $$(FAKEROOT_SCRIPT)
 135         $$(INSTALL) -m 0644 support/misc/target-dir-warning.txt $$(TARGET_DIR_WARNING_FILE)
 136 ifneq ($$(ROOTFS_$(2)_COMPRESS_CMD),)
 137         PATH=$$(BR_PATH) $$(ROOTFS_$(2)_COMPRESS_CMD) $$@ > $$@$$(ROOTFS_$(2)_COMPRESS_EXT)
 138 endif
 139         $$(foreach hook,$$(ROOTFS_$(2)_POST_GEN_HOOKS),$$(call $$(hook))$$(sep))
 140
 141 rootfs-$(1)-show-depends:
 142         @echo $$(ROOTFS_$(2)_DEPENDENCIES)
 143
 144 rootfs-$(1): $$(BINARIES_DIR)/rootfs.$(1)
 145
 146 .PHONY: rootfs-$(1) rootfs-$(1)-show-depends
 147
 148 ifeq ($$(BR2_TARGET_ROOTFS_$(2)),y)
 149 TARGETS_ROOTFS += rootfs-$(1)
 150 PACKAGES += $$(filter-out rootfs-%,$$(ROOTFS_$(2)_DEPENDENCIES))
 151 endif
 152
 153 # Check for legacy POST_TARGETS rules
 154 ifneq ($$(ROOTFS_$(2)_POST_TARGETS),)
 155 $$(error Filesystem $(1) uses post-target rules, which are no longer supported.\
 156         Update $(1) to use post-gen hooks instead)
 157 endif
 158
 159 endef
 160
 161 # $(pkgname) also works well to return the filesystem name
 162 rootfs = $(call inner-rootfs,$(pkgname),$(call UPPERCASE,$(pkgname)))
 163
 164 include $(sort $(wildcard fs/*/*.mk))