btrfs-progs: Add Android build mk file

Add Android.mk to use btrfs on android device.

There are still outstanding problems and build support is incomplete:

1) phread_cancel was changed to pthread_kill due to android didn't
   support that.
2) This module needs lzo library on android/external folder.
3) blkid library doesn't support fully. So have to use -f option to
   work.

Signed-off-by: kenneth.kang <kenneth.kang@lge.com>
Signed-off-by: David Sterba <dsterba@suse.com>

Android.mk

@@ -0,0 +1,111 @@
+LOCAL_PATH:= $(call my-dir)
+
+#include $(call all-subdir-makefiles)
+
+CFLAGS := -g -O1 -Wall -D_FORTIFY_SOURCE=2 -include config.h \
+	-DBTRFS_FLAT_INCLUDES -D_XOPEN_SOURCE=700 -fno-strict-aliasing -fPIC
+
+LDFLAGS := -static -rdynamic
+
+LIBS := -luuid   -lblkid   -lz   -llzo2 -L. -lpthread
+LIBBTRFS_LIBS := $(LIBS)
+
+STATIC_CFLAGS := $(CFLAGS) -ffunction-sections -fdata-sections
+STATIC_LDFLAGS := -static -Wl,--gc-sections
+STATIC_LIBS := -luuid   -lblkid -luuid -lz   -llzo2 -L. -pthread
+
+btrfs_shared_libraries := libext2_uuid \
+			libext2_blkid
+
+objects := ctree.c disk-io.c radix-tree.c extent-tree.c print-tree.c \
+          root-tree.c dir-item.c file-item.c inode-item.c inode-map.c \
+          extent-cache.c extent_io.c volumes.c utils.c repair.c \
+          qgroup.c raid6.c free-space-cache.c list_sort.c props.c \
+          ulist.c qgroup-verify.c backref.c string-table.c task-utils.c \
+          inode.c file.c find-root.c
+cmds_objects := cmds-subvolume.c cmds-filesystem.c cmds-device.c cmds-scrub.c \
+               cmds-inspect.c cmds-balance.c cmds-send.c cmds-receive.c \
+               cmds-quota.c cmds-qgroup.c cmds-replace.c cmds-check.c \
+               cmds-restore.c cmds-rescue.c chunk-recover.c super-recover.c \
+               cmds-property.c cmds-fi-usage.c
+libbtrfs_objects := send-stream.c send-utils.c rbtree.c btrfs-list.c crc32c.c \
+                   uuid-tree.c utils-lib.c rbtree-utils.c
+libbtrfs_headers := send-stream.h send-utils.h send.h rbtree.h btrfs-list.h \
+                   crc32c.h list.h kerncompat.h radix-tree.h extent-cache.h \
+                   extent_io.h ioctl.h ctree.h btrfsck.h version.h
+TESTS := fsck-tests.sh convert-tests.sh
+blkid_objects := partition/ superblocks/ topology/
+
+
+# external/e2fsprogs/lib is needed for uuid/uuid.h
+common_C_INCLUDES := $(LOCAL_PATH) external/e2fsprogs/lib/ external/lzo/include/ external/zlib/
+
+#----------------------------------------------------------
+include $(CLEAR_VARS)
+LOCAL_SRC_FILES := $(libbtrfs_objects)
+LOCAL_CFLAGS := $(STATIC_CFLAGS)
+LOCAL_MODULE := libbtrfs
+LOCAL_C_INCLUDES := $(common_C_INCLUDES)
+include $(BUILD_STATIC_LIBRARY)
+
+#----------------------------------------------------------
+include $(CLEAR_VARS)
+LOCAL_MODULE := btrfs
+#LOCAL_FORCE_STATIC_EXECUTABLE := true
+LOCAL_SRC_FILES := \
+		$(objects) \
+		$(cmds_objects) \
+		btrfs.c \
+		help.c \
+
+LOCAL_C_INCLUDES := $(common_C_INCLUDES)
+LOCAL_CFLAGS := $(STATIC_CFLAGS)
+#LOCAL_LDLIBS := $(LIBBTRFS_LIBS)
+#LOCAL_LDFLAGS := $(STATIC_LDFLAGS)
+LOCAL_SHARED_LIBRARIES := $(btrfs_shared_libraries)
+LOCAL_STATIC_LIBRARIES := libbtrfs liblzo-static libz
+LOCAL_SYSTEM_SHARED_LIBRARIES := libc libcutils
+
+LOCAL_EXPORT_C_INCLUDES := $(common_C_INCLUDES)
+#LOCAL_MODULE_TAGS := optional
+include $(BUILD_EXECUTABLE)
+
+#----------------------------------------------------------
+include $(CLEAR_VARS)
+LOCAL_MODULE := mkfs.btrfs
+LOCAL_SRC_FILES := \
+                $(objects) \
+                mkfs.c
+
+LOCAL_C_INCLUDES := $(common_C_INCLUDES)
+LOCAL_CFLAGS := $(STATIC_CFLAGS)
+#LOCAL_LDLIBS := $(LIBBTRFS_LIBS)
+#LOCAL_LDFLAGS := $(STATIC_LDFLAGS)
+LOCAL_SHARED_LIBRARIES := $(btrfs_shared_libraries)
+LOCAL_STATIC_LIBRARIES := libbtrfs liblzo-static
+LOCAL_SYSTEM_SHARED_LIBRARIES := libc libcutils
+
+LOCAL_EXPORT_C_INCLUDES := $(common_C_INCLUDES)
+#LOCAL_MODULE_TAGS := optional
+include $(BUILD_EXECUTABLE)
+
+#---------------------------------------------------------------
+include $(CLEAR_VARS)
+LOCAL_MODULE := btrfstune
+LOCAL_SRC_FILES := \
+                $(objects) \
+                btrfstune.c
+
+LOCAL_C_INCLUDES := $(common_C_INCLUDES)
+LOCAL_CFLAGS := $(STATIC_CFLAGS)
+LOCAL_SHARED_LIBRARIES := $(btrfs_shared_libraries)
+#LOCAL_LDLIBS := $(LIBBTRFS_LIBS)
+#LOCAL_LDFLAGS := $(STATIC_LDFLAGS)
+LOCAL_SHARED_LIBRARIES := $(btrfs_shared_libraries)
+LOCAL_STATIC_LIBRARIES := libbtrfs liblzo-static
+LOCAL_SYSTEM_SHARED_LIBRARIES := libc libcutils
+
+LOCAL_EXPORT_C_INCLUDES := $(common_C_INCLUDES)
+LOCAL_MODULE_TAGS := optional
+include $(BUILD_EXECUTABLE)
+#--------------------------------------------------------------