Commit 21f3bcc1 authored by Thomas Petazzoni's avatar Thomas Petazzoni
Browse files

target: Add new infrastructure for filesystem generation 



In order to avoid code duplication between the different filesystem
generation makefile, we introduce a ROOTFS_TARGET macro. Documentation
for this macro is contained in the patch.

Signed-off-by: default avatarThomas Petazzoni <thomas.petazzoni@free-electrons.com>
parent b605699f

target/Makefile.in

+1 −0
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@@ -63,6 +63,7 @@ include target/u-boot/Makefile.in 
endif



# and finally build the filesystems/tarballs

include target/common.mk

include target/*/*.mk



# kernel rules

target/common.mk

0 → 100644
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#

# 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

# configura 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.



FAKEROOT_SCRIPT = $(BUILD_DIR)/_fakeroot.fs



define ROOTFS_TARGET_INTERNAL



$(IMAGE).$(1): $(ROOTFS_$(2)_DEPENDENCIES) host-fakeroot makedevs $(if $(BR2_TARGET_ROOTFS_$(2)_LZMA),host-lzma)

	@$(call MESSAGE,"Generating root filesystem image $(IMAGE).$(1)")

	$(foreach hook,$(ROOTFS_$(2)_PRE_GEN_HOOKS),$(call $(hook))$(sep))

	rm -f $(FAKEROOT_SCRIPT)

	touch $(BUILD_DIR)/.fakeroot.00000

	cat $(BUILD_DIR)/.fakeroot* > $(FAKEROOT_SCRIPT)

	echo "chown -R 0:0 $(TARGET_DIR)" >> $(FAKEROOT_SCRIPT)

ifneq ($(TARGET_DEVICE_TABLE),)

	echo "$(HOST_DIR)/usr/bin/makedevs -d $(TARGET_DEVICE_TABLE) $(TARGET_DIR)" >> $(FAKEROOT_SCRIPT)

endif

	echo "$(ROOTFS_$(2)_CMD)" >> $(FAKEROOT_SCRIPT)

	chmod a+x $(FAKEROOT_SCRIPT)

	$(HOST_DIR)/usr/bin/fakeroot -- $(FAKEROOT_SCRIPT)

	-@rm -f $(FAKEROOT_SCRIPT)

	$(foreach hook,$(ROOTFS_$(2)_POST_GEN_HOOKS),$(call $(hook))$(sep))

ifeq ($$(BR2_TARGET_ROOTFS_$(2)_GZIP),y)

	gzip -9 -c $$@ > $$@.gz

endif

ifeq ($$(BR2_TARGET_ROOTFS_$(2)_BZIP2),y)

	bzip2 -9 -c $$@ > $$@.bz2

endif

ifeq ($$(BR2_TARGET_ROOTFS_$(2)_LZMA),y)

	$(LZMA) -9 -c $$@ > $$@.lzma

endif



$(1)-root: $(IMAGE).$(1)



ifeq ($$(BR2_TARGET_ROOTFS_$(2)),y)

TARGETS += $(1)-root

endif

endef



define ROOTFS_TARGET

$(call ROOTFS_TARGET_INTERNAL,$(1),$(call UPPERCASE,$(1)))

endef
 
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