Compiling WiimoTetris in devkitPro 1.5

I want to write something with the wiimote and basic graphic, so start with some open source with similar property.
Wiimotetries should (hopefully) serve this objective nicely.
Actually ScummVM is much complete but the code is too complex for me at the moment.
Compilation is failed with some errors below. Clean up and update are needed.
- the sdcard.h is removed from devkitpro 1.5. The project doesn't use the sdcard so cleaning up this one should be easy.
- the wiiuse is completely rewritten for the wiimote access (now wpad). Updating this one would be a major task.

Administrator@BLOODY ~
$ cd /d/

Administrator@BLOODY /d
$ cd games/wii

Administrator@BLOODY /d/games/wii
$ cd HomebrewApps/

Administrator@BLOODY /d/games/wii/HomebrewApps
$ cd Wiimotetris

Administrator@BLOODY /d/games/wii/HomebrewApps/Wiimotetris
$ ls
Makefile Wiimotetris.elf data include source
Wiimotetris.dol build gfx readme.txt vs

Administrator@BLOODY /d/games/wii/HomebrewApps/Wiimotetris
$ make clean
clean ...

Administrator@BLOODY /d/games/wii/HomebrewApps/Wiimotetris
$ make
black.raw.bin
blue.raw.bin
candy.raw.bin
font.raw.bin
green.raw.bin
iceblue.raw.bin
mod.epidemic.mod
mod.fear.mod
mod.human.mod
orange.raw.bin
pieces.bin
red.raw.bin
tetris.mod
yellow.raw.bin
classic.c
dynamics.c
events.c
guitar_hero_3.c
io.c
io_nix.c
io_wii.c
d:/games/wii/HomebrewApps/Wiimotetris/source/io_wii.c: In function 'wiiuse_conne
ct_single':
d:/games/wii/HomebrewApps/Wiimotetris/source/io_wii.c:183: warning: implicit dec
laration of function 'bte_connect'
io_win.c
ir.c
mt.c
nunchuk.c
wiimote.c
d:/games/wii/HomebrewApps/Wiimotetris/source/wiimote.c:8:20: warning: sdcard.h:
No such file or directory
d:/games/wii/HomebrewApps/Wiimotetris/source/wiimote.c: In function 'start_wm':
d:/games/wii/HomebrewApps/Wiimotetris/source/wiimote.c:99: warning: implicit dec
laration of function 'bte_init'
d:/games/wii/HomebrewApps/Wiimotetris/source/wiimote.c:100: warning: implicit de
claration of function 'bte_start'
wiiuse.c
bg.cpp
block.cpp
blocks.cpp
globals.cpp
hitstuff.cpp
input.cpp
main.cpp
menu.cpp
removelines.cpp
reset.cpp
rotate.cpp
text.cpp
winner.cpp
linking ... Wiimotetris.elf
io_wii.o: In function `wiiuse_connect_single':
d:/games/wii/HomebrewApps/Wiimotetris/source/io_wii.c:183: undefined reference t
o `bte_connect'
d:/games/wii/HomebrewApps/Wiimotetris/source/io_wii.c:199: undefined reference t
o `bte_connect'
wiimote.o: In function `start_wm':
d:/games/wii/HomebrewApps/Wiimotetris/source/wiimote.c:99: undefined reference t
o `bte_init'
d:/games/wii/HomebrewApps/Wiimotetris/source/wiimote.c:100: undefined reference
to `bte_start'
collect2: ld returned 1 exit status
make[1]: *** [/d/games/wii/HomebrewApps/Wiimotetris/Wiimotetris.elf] Error 1
make: *** [build] Error 2

Administrator@BLOODY /d/games/wii/HomebrewApps/Wiimotetris
$