kumquat-buildroot/fs/common.mk
Peter Korsgaard 51fa8d8e28 fs/common.mk: support lz4 compression
Similar to the other compressors.  Notice that we use the -l (legacy format)
for Linux kernel initrd compatibility.

Lz4 decompression is supported by the Linux kernel since 3.11.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2018-01-08 23:43:58 +01:00

140 lines
5.3 KiB
Makefile

#
# Macro that builds the needed Makefile target to create a root
# filesystem image.
#
# The following variable must be defined before calling this macro
#
# ROOTFS_$(FSTYPE)_CMD, the command that generates the root
# filesystem image. A single command is allowed. The filename of the
# filesystem image that it must generate is $$@.
#
# The following variables can optionaly be defined
#
# ROOTFS_$(FSTYPE)_DEPENDENCIES, the list of dependencies needed to
# build the root filesystem (usually host tools)
#
# ROOTFS_$(FSTYPE)_PRE_GEN_HOOKS, a list of hooks to call before
# generating the filesystem image
#
# ROOTFS_$(FSTYPE)_POST_GEN_HOOKS, a list of hooks to call after
# generating the filesystem image
#
# In terms of configuration option, this macro assumes that the
# BR2_TARGET_ROOTFS_$(FSTYPE) config option allows to enable/disable
# the generation of a filesystem image of a particular type. If
# the configuration options BR2_TARGET_ROOTFS_$(FSTYPE)_GZIP,
# BR2_TARGET_ROOTFS_$(FSTYPE)_BZIP2 or
# BR2_TARGET_ROOTFS_$(FSTYPE)_LZMA exist and are enabled, then the
# macro will automatically generate a compressed filesystem image.
FS_DIR = $(BUILD_DIR)/buildroot-fs
FAKEROOT_SCRIPT = $(FS_DIR)/fakeroot.fs
FULL_DEVICE_TABLE = $(FS_DIR)/device_table.txt
ROOTFS_DEVICE_TABLES = $(call qstrip,$(BR2_ROOTFS_DEVICE_TABLE) \
$(BR2_ROOTFS_STATIC_DEVICE_TABLE))
USERS_TABLE = $(FS_DIR)/users_table.txt
ROOTFS_USERS_TABLES = $(call qstrip,$(BR2_ROOTFS_USERS_TABLES))
# Since this function will be called from within an $(eval ...)
# all variable references except the arguments must be $$-quoted.
define inner-rootfs
# extra deps
ROOTFS_$(2)_DEPENDENCIES += host-fakeroot host-makedevs \
$$(if $$(PACKAGES_USERS)$$(ROOTFS_USERS_TABLES),host-mkpasswd)
ifeq ($$(BR2_TARGET_ROOTFS_$(2)_GZIP),y)
ROOTFS_$(2)_COMPRESS_EXT = .gz
ROOTFS_$(2)_COMPRESS_CMD = gzip -9 -c
endif
ifeq ($$(BR2_TARGET_ROOTFS_$(2)_BZIP2),y)
ROOTFS_$(2)_COMPRESS_EXT = .bz2
ROOTFS_$(2)_COMPRESS_CMD = bzip2 -9 -c
endif
ifeq ($$(BR2_TARGET_ROOTFS_$(2)_LZMA),y)
ROOTFS_$(2)_DEPENDENCIES += host-lzma
ROOTFS_$(2)_COMPRESS_EXT = .lzma
ROOTFS_$(2)_COMPRESS_CMD = $$(LZMA) -9 -c
endif
ifeq ($$(BR2_TARGET_ROOTFS_$(2)_LZ4),y)
ROOTFS_$(2)_DEPENDENCIES += host-lz4
ROOTFS_$(2)_COMPRESS_EXT = .lz4
ROOTFS_$(2)_COMPRESS_CMD = lz4 -l -9 -c
endif
ifeq ($$(BR2_TARGET_ROOTFS_$(2)_LZO),y)
ROOTFS_$(2)_DEPENDENCIES += host-lzop
ROOTFS_$(2)_COMPRESS_EXT = .lzo
ROOTFS_$(2)_COMPRESS_CMD = $$(LZOP) -9 -c
endif
ifeq ($$(BR2_TARGET_ROOTFS_$(2)_XZ),y)
ROOTFS_$(2)_DEPENDENCIES += host-xz
ROOTFS_$(2)_COMPRESS_EXT = .xz
ROOTFS_$(2)_COMPRESS_CMD = xz -9 -C crc32 -c
endif
$$(BINARIES_DIR)/rootfs.$(1): target-finalize $$(ROOTFS_$(2)_DEPENDENCIES)
@$$(call MESSAGE,"Generating root filesystem image rootfs.$(1)")
rm -rf $(FS_DIR)
mkdir -p $(FS_DIR)
$$(foreach hook,$$(ROOTFS_$(2)_PRE_GEN_HOOKS),$$(call $$(hook))$$(sep))
echo '#!/bin/sh' > $$(FAKEROOT_SCRIPT)
echo "set -e" >> $$(FAKEROOT_SCRIPT)
echo "chown -h -R 0:0 $$(TARGET_DIR)" >> $$(FAKEROOT_SCRIPT)
ifneq ($$(ROOTFS_USERS_TABLES),)
cat $$(ROOTFS_USERS_TABLES) >> $$(USERS_TABLE)
endif
$$(call PRINTF,$$(PACKAGES_USERS)) >> $$(USERS_TABLE)
PATH=$$(BR_PATH) $$(TOPDIR)/support/scripts/mkusers $$(USERS_TABLE) $$(TARGET_DIR) >> $$(FAKEROOT_SCRIPT)
ifneq ($$(ROOTFS_DEVICE_TABLES),)
cat $$(ROOTFS_DEVICE_TABLES) > $$(FULL_DEVICE_TABLE)
ifeq ($$(BR2_ROOTFS_DEVICE_CREATION_STATIC),y)
$$(call PRINTF,$$(PACKAGES_DEVICES_TABLE)) >> $$(FULL_DEVICE_TABLE)
endif
endif
$$(call PRINTF,$$(PACKAGES_PERMISSIONS_TABLE)) >> $$(FULL_DEVICE_TABLE)
echo "$$(HOST_DIR)/bin/makedevs -d $$(FULL_DEVICE_TABLE) $$(TARGET_DIR)" >> $$(FAKEROOT_SCRIPT)
$$(foreach s,$$(call qstrip,$$(BR2_ROOTFS_POST_FAKEROOT_SCRIPT)),\
echo "echo '$$(TERM_BOLD)>>> Executing fakeroot script $$(s)$$(TERM_RESET)'" >> $$(FAKEROOT_SCRIPT); \
echo $$(s) $$(TARGET_DIR) $$(BR2_ROOTFS_POST_SCRIPT_ARGS) >> $$(FAKEROOT_SCRIPT)$$(sep))
$$(foreach hook,$$(ROOTFS_PRE_CMD_HOOKS),\
$$(call PRINTF,$$($$(hook))) >> $$(FAKEROOT_SCRIPT)$$(sep))
ifeq ($$(BR2_REPRODUCIBLE),y)
echo "find $$(TARGET_DIR) -print0 | xargs -0 -r touch -hd @$$(SOURCE_DATE_EPOCH)" >> $$(FAKEROOT_SCRIPT)
endif
$$(call PRINTF,$$(ROOTFS_$(2)_CMD)) >> $$(FAKEROOT_SCRIPT)
$$(foreach hook,$$(ROOTFS_POST_CMD_HOOKS),\
$$(call PRINTF,$$($$(hook))) >> $$(FAKEROOT_SCRIPT)$$(sep))
chmod a+x $$(FAKEROOT_SCRIPT)
rm -f $$(TARGET_DIR_WARNING_FILE)
PATH=$$(BR_PATH) $$(HOST_DIR)/bin/fakeroot -- $$(FAKEROOT_SCRIPT)
$$(INSTALL) -m 0644 support/misc/target-dir-warning.txt $$(TARGET_DIR_WARNING_FILE)
ifneq ($$(ROOTFS_$(2)_COMPRESS_CMD),)
PATH=$$(BR_PATH) $$(ROOTFS_$(2)_COMPRESS_CMD) $$@ > $$@$$(ROOTFS_$(2)_COMPRESS_EXT)
endif
$$(foreach hook,$$(ROOTFS_$(2)_POST_GEN_HOOKS),$$(call $$(hook))$$(sep))
rootfs-$(1)-show-depends:
@echo $$(ROOTFS_$(2)_DEPENDENCIES)
rootfs-$(1): $$(BINARIES_DIR)/rootfs.$(1)
.PHONY: rootfs-$(1) rootfs-$(1)-show-depends
ifeq ($$(BR2_TARGET_ROOTFS_$(2)),y)
TARGETS_ROOTFS += rootfs-$(1)
PACKAGES += $$(filter-out rootfs-%,$$(ROOTFS_$(2)_DEPENDENCIES))
endif
# Check for legacy POST_TARGETS rules
ifneq ($$(ROOTFS_$(2)_POST_TARGETS),)
$$(error Filesystem $(1) uses post-target rules, which are no longer supported.\
Update $(1) to use post-gen hooks instead)
endif
endef
# $(pkgname) also works well to return the filesystem name
rootfs = $(call inner-rootfs,$(pkgname),$(call UPPERCASE,$(pkgname)))
include $(sort $(wildcard fs/*/*.mk))