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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 # configura 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
38 define ROOTFS_TARGET_INTERNAL
39
40 # extra deps
41 $(eval ROOTFS_$(2)_DEPENDENCIES += host-fakeroot host-makedevs $(if $(BR2_TARGET_ROOTFS_$(2)_LZMA),host-lzma))
42
43 $(BINARIES_DIR)/rootfs.$(1): $(ROOTFS_$(2)_DEPENDENCIES)
44         @$(call MESSAGE,"Generating root filesystem image rootfs.$(1)")
45         $(foreach hook,$(ROOTFS_$(2)_PRE_GEN_HOOKS),$(call $(hook))$(sep))
46         rm -f $(FAKEROOT_SCRIPT)
47         touch $(BUILD_DIR)/.fakeroot.00000
48         cat $(BUILD_DIR)/.fakeroot* > $(FAKEROOT_SCRIPT)
49         echo "chown -R 0:0 $(TARGET_DIR)" >> $(FAKEROOT_SCRIPT)
50 ifneq ($(ROOTFS_DEVICE_TABLES),)
51         cat $(ROOTFS_DEVICE_TABLES) > $(FULL_DEVICE_TABLE)
52         echo "$(HOST_DIR)/usr/bin/makedevs -d $(FULL_DEVICE_TABLE) $(TARGET_DIR)" >> $(FAKEROOT_SCRIPT)
53 endif
54         echo "$(ROOTFS_$(2)_CMD)" >> $(FAKEROOT_SCRIPT)
55         chmod a+x $(FAKEROOT_SCRIPT)
56         $(HOST_DIR)/usr/bin/fakeroot -- $(FAKEROOT_SCRIPT)
57         -@rm -f $(FAKEROOT_SCRIPT) $(FULL_DEVICE_TABLE)
58         $(foreach hook,$(ROOTFS_$(2)_POST_GEN_HOOKS),$(call $(hook))$(sep))
59 ifeq ($$(BR2_TARGET_ROOTFS_$(2)_GZIP),y)
60         gzip -9 -c $$@ > [email protected]
61 endif
62 ifeq ($$(BR2_TARGET_ROOTFS_$(2)_BZIP2),y)
63         bzip2 -9 -c $$@ > [email protected]
64 endif
65 ifeq ($$(BR2_TARGET_ROOTFS_$(2)_LZMA),y)
66         $(LZMA) -9 -c $$@ > [email protected]
67 endif
68
69 rootfs-$(1)-show-depends:
70         @echo $(ROOTFS_$(2)_DEPENDENCIES)
71
72 rootfs-$(1): $(BINARIES_DIR)/rootfs.$(1) $(ROOTFS_$(2)_POST_TARGETS)
73
74 ifeq ($$(BR2_TARGET_ROOTFS_$(2)),y)
75 TARGETS += rootfs-$(1)
76 endif
77 endef
78
79 define ROOTFS_TARGET
80 $(call ROOTFS_TARGET_INTERNAL,$(1),$(call UPPERCASE,$(1)))
81 endef
82
83 include fs/*/*.mk
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