arch/linux.c:2313:32: warning: implicit declaration of function 'dm_task_create'; did you mean 'timer_create'? [-Wimplicit-function-declaration]
         struct dm_task *task = dm_task_create (DM_DEVICE_INFO);
                                ^~~~~~~~~~~~~~
                                timer_create
arch/linux.c:2313:48: error: 'DM_DEVICE_INFO' undeclared (first use in this function); did you mean 'PED_DEVICE_I2O'?
         struct dm_task *task = dm_task_create (DM_DEVICE_INFO);
                                                ^~~~~~~~~~~~~~
                                                PED_DEVICE_I2O
arch/linux.c:2313:48: note: each undeclared identifier is reported only once for each function it appears in
arch/linux.c:2316:14: warning: implicit declaration of function 'dm_task_set_major_minor' [-Wimplicit-function-declaration]
         if (!dm_task_set_major_minor (task, arch_specific->major,
              ^~~~~~~~~~~~~~~~~~~~~~~
arch/linux.c:2319:14: warning: implicit declaration of function 'dm_task_run' [-Wimplicit-function-declaration]
         if (!dm_task_run(task))
              ^~~~~~~~~~~
arch/linux.c:2321:55: warning: implicit declaration of function 'dm_task_get_name'; did you mean 'ped_unit_get_name'? [-Wimplicit-function-declaration]
         char *dev_name = zasprintf ("/dev/mapper/%s", dm_task_get_name (task));
                                                       ^~~~~~~~~~~~~~~~
                                                       ped_unit_get_name
arch/linux.c:2321:51: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'int' [-Wformat=]
         char *dev_name = zasprintf ("/dev/mapper/%s", dm_task_get_name (task));
                                                  ~^   ~~~~~~~~~~~~~~~~~~~~~~~

#
# Copyright (C) 2007 OpenWrt.org
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#
# $Id: Makefile 10812 2008-04-13 12:06:07Z olli $
#
# http://ftp.gnu.org/gnu/parted/parted-1.8.8.tar.bz2

include $(TOPDIR)/rules.mk

PKG_NAME:=parted
PKG_VERSION:=3.2
PKG_RELEASE:=1

PKG_INSTALL:=1

PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
PKG_SOURCE_URL:=@GNU/$(PKG_NAME)

include $(INCLUDE_DIR)/package.mk

define Package/parted
  SECTION:=utils
  CATEGORY:=Utilities
  TITLE:=parted Partition editor
  URL:=http://www.gnu.org/software/parted/index.shtml
endef

define Package/parted/description
        parted Partition editor
        http://www.gnu.org/software/parted/index.shtml
endef

define Build/Configure
        $(call Build/Configure/Default, \
                --without-readline \
                --disable-device-mapper \
                --disable-nls \
        )
endef

define Package/parted/install
        $(INSTALL_DIR) $(1)/usr/sbin
        $(INSTALL_DIR) $(1)/usr/lib
        $(CP)          $(PKG_INSTALL_DIR)/usr/lib/*.so*      $(1)/usr/lib
        $(INSTALL_BIN) $(PKG_INSTALL_DIR)/usr/sbin/parted    $(1)/usr/sbin
        $(INSTALL_BIN) $(PKG_INSTALL_DIR)/usr/sbin/partprobe $(1)/usr/sbin
endef

$(eval $(call BuildPackage,parted))

--- a/libparted/fs/xfs/platform_defs.h
+++ b/libparted/fs/xfs/platform_defs.h
@@ -51,6 +51,7 @@
 # define constpp       char * const *
 #endif

+typedef long long          loff_t;
 typedef loff_t         xfs_off_t;
 typedef uint64_t       xfs_ino_t;
 typedef uint32_t       xfs_dev_t;

Version: 4.10806
Build Hash: e0894404
Compile Date: 2019-05-21 08:44:52
dzVents Version: 2.4.21
Python Version: 3.7.2 (default, Apr 21 2019, 14:15:23) [GCC 7.4.0]

Uptime: 2 Days, 19 Hours, 37 Minutes, 25 Seconds 

root@OpenWrtWR842Nv3:~# ./u-boot-upgrade.sh

=======================================================
DISCLAIMER: you are using this script at your own risk!

The author of U-Boot modification and this script takes
no responsibility for any of the results of using them.

     Updating U-Boot is a very dangerous operation
   and may damage your device! You have been warned!
=======================================================

-----> Do you want to continue (type 'yes' or 'no')? yes

[ ok ] Found U-Boot image file: 'u-boot_mod__tp-link_tl-wr842n_v3__20180223__git_master-7a540a78.bin'

-----> Do you want to use this file (type 'yes' or 'no')? yes

[ ok ] MD5 checksum of new U-Boot image file is correct
[ ok ] Backup of /dev/mtd0 successfully created

-----> Do you want to store backup (recommended) in '/etc/u-boot_mod/backup/' (type 'yes' or 'no')? yes

[ ok ] Backup of '/dev/mtd0' successfully copied to '/etc/u-boot_mod/backup/'
[warn] Partition '/dev/mtd0' is not writable
[info] Unlocking '/dev/mtd0' partition...
[ ok ] Partition '/dev/mtd0' successfully unlocked
[ ok ] New U-Boot image successfully combined with backup file
[info] New U-Boot image is ready to be written into FLASH

-----> Do you want to continue (type 'yes' or 'no')? yes

[ ok ] New U-Boot image successfully written into FLASH
[ ok ] '/dev/mtd0' and new U-Boot image are equal
[info] Done! You can now reboot your device!