Makefile upload taking too long.

I’ve been trying to use the makefile from here http://playground.arduino.cc/uploads/Learning/Makefile but it takes far too long to upload. So I’ve made some modifications:

# Arduino makefile
#
# This makefile allows you to build sketches from the command line
# without the Arduino environment (or Java).
#
# The Arduino environment does preliminary processing on a sketch before
# compiling it.  If you're using this makefile instead, you'll need to do
# a few things differently:
#
#   - Give your program's file a .cpp extension (e.g. foo.cpp).
#
#   - Put this line at top of your code: #include <WProgram.h>
#
#   - Write prototypes for all your functions (or define them before you
#     call them).  A prototype declares the types of parameters a
#     function will take and what type of value it will return.  This
#     means that you can have a call to a function before the definition
#     of the function.  A function prototype looks like the first line of
#     the function, with a semi-colon at the end.  For example:
#     int digitalRead(int pin);
#
# Instructions for using the makefile:
#
#  1. Copy this file into the folder with your sketch.
#
#  2. Below, modify the line containing "TARGET" to refer to the name of
#     of your program's file without an extension (e.g. TARGET = foo).
#
#  3. Modify the line containg "ARDUINO" to point the directory that
#     contains the Arduino core (for normal Arduino installations, this
#     is the lib/targets/arduino sub-directory).
#
#  4. Modify the line containing "PORT" to refer to the filename
#     representing the USB or serial connection to your Arduino board
#     (e.g. PORT = /dev/tty.USB0).  If the exact name of this file
#     changes, you can use * as a wildcard (e.g. PORT = /dev/tty.USB*).
#
#  5. At the command line, change to the directory containing your
#     program's file and the makefile.
#
#  6. Type "make" and press enter to compile/verify your program.
#
#  7. Type "make upload", reset your Arduino board, and press enter  to
#     upload your program to the Arduino board.
#
# $Id$

PORT = /dev/ttyACM0
TARGET = arm
ARDUINO = /home/noah/src/arm/arduino/
SRC = $(ARDUINO)/buffer.c $(ARDUINO)/pins_arduino.c \
  $(ARDUINO)/Serial.c $(ARDUINO)/uart.c $(ARDUINO)/wiring.c
CXXSRC = $(TARGET).cpp $(ARDUINO)/HardwareSerial.cpp $(ARDUINO)/WRandom.cpp
#MCU = atmega8
MCU = atmega328p

F_CPU = 16000000
FORMAT = ihex
UPLOAD_RATE = 19200
#UPLOAD_RATE = 115200

# Name of this Makefile (used for "make depend").
MAKEFILE = Makefile

# Debugging format.
# Native formats for AVR-GCC's -g are stabs [default], or dwarf-2.
# AVR (extended) COFF requires stabs, plus an avr-objcopy run.
DEBUG = stabs

OPT = s

# Place -D or -U options here
CDEFS = -DF_CPU=$(F_CPU)
CXXDEFS = -DF_CPU=$(F_CPU)

# Place -I options here
CINCS = -I$(ARDUINO)
CXXINCS = -I$(ARDUINO)

# Compiler flag to set the C Standard level.
# c89   - "ANSI" C
# gnu89 - c89 plus GCC extensions
# c99   - ISO C99 standard (not yet fully implemented)
# gnu99 - c99 plus GCC extensions
CSTANDARD = -std=gnu99
CDEBUG = -g$(DEBUG)
CWARN = -Wall -Wstrict-prototypes
CTUNING = -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums
#CEXTRA = -Wa,-adhlns=$(<:.c=.lst)

CFLAGS = $(CDEBUG) $(CDEFS) $(CINCS) -O$(OPT) $(CWARN) $(CSTANDARD) $(CEXTRA)
CXXFLAGS = $(CDEFS) $(CINCS) -O$(OPT)
#ASFLAGS = -Wa,-adhlns=$(<:.S=.lst),-gstabs 
LDFLAGS = 


# Programming support using avrdude. Settings and variables.
#
#AVRDUDE_PROGRAMMER = stk500
AVRDUDE_PROGRAMMER =arduino
AVRDUDE_PORT = $(PORT)
AVRDUDE_WRITE_FLASH = -U flash:w:$(TARGET).hex
AVRDUDE_FLAGS =-F -p $(MCU) -P $(AVRDUDE_PORT) -c $(AVRDUDE_PROGRAMMER) -b $(UPLOAD_RATE) -D

# Program settings
CC = avr-gcc
CXX = avr-g++
OBJCOPY = avr-objcopy
OBJDUMP = avr-objdump
SIZE = avr-size
NM = avr-nm
AVRDUDE = avrdude
REMOVE = rm -f
MV = mv -f

# Define all object files.
OBJ = $(SRC:.c=.o) $(CXXSRC:.cpp=.o) $(ASRC:.S=.o)

# Define all listing files.
LST = $(ASRC:.S=.lst) $(CXXSRC:.cpp=.lst) $(SRC:.c=.lst)

# Combine all necessary flags and optional flags.
# Add target processor to flags.
ALL_CFLAGS = -mmcu=$(MCU) -I. $(CFLAGS)
ALL_CXXFLAGS = -mmcu=$(MCU) -I. $(CXXFLAGS)
ALL_ASFLAGS = -mmcu=$(MCU) -I. -x assembler-with-cpp $(ASFLAGS)


# Default target.
all: build

build: elf hex eep

elf: $(TARGET).elf
hex: $(TARGET).hex
eep: $(TARGET).eep
lss: $(TARGET).lss 
sym: $(TARGET).sym

# Program the device.  
upload: $(TARGET).hex $(TARGET).eep
	$(AVRDUDE) $(AVRDUDE_FLAGS) $(AVRDUDE_WRITE_FLASH)




# Convert ELF to COFF for use in debugging / simulating in AVR Studio or VMLAB.
COFFCONVERT=$(OBJCOPY) --debugging \
--change-section-address .data-0x800000 \
--change-section-address .bss-0x800000 \
--change-section-address .noinit-0x800000 \
--change-section-address .eeprom-0x810000 


coff: $(TARGET).elf
	$(COFFCONVERT) -O coff-avr $(TARGET).elf $(TARGET).cof


extcoff: $(TARGET).elf
	$(COFFCONVERT) -O coff-ext-avr $(TARGET).elf $(TARGET).cof


.SUFFIXES: .elf .hex .eep .lss .sym

.elf.hex:
	$(OBJCOPY) -O $(FORMAT) -R .eeprom $< $@

.elf.eep:
	-$(OBJCOPY) -j .eeprom --set-section-flags=.eeprom="alloc,load" \
	--change-section-lma .eeprom=0 -O $(FORMAT) $< $@

# Create extended listing file from ELF output file.
.elf.lss:
	$(OBJDUMP) -h -S $< > $@

# Create a symbol table from ELF output file.
.elf.sym:
	$(NM) -n $< > $@



# Link: create ELF output file from object files.
$(TARGET).elf: $(OBJ)
	$(CC) $(ALL_CFLAGS) $(OBJ) --output $@ $(LDFLAGS)


# Compile: create object files from C++ source files.
.cpp.o:
	$(CXX) -c $(ALL_CXXFLAGS) $< -o $@ 

# Compile: create object files from C source files.
.c.o:
	$(CC) -c $(ALL_CFLAGS) $< -o $@ 


# Compile: create assembler files from C source files.
.c.s:
	$(CC) -S $(ALL_CFLAGS) $< -o $@


# Assemble: create object files from assembler source files.
.S.o:
	$(CC) -c $(ALL_ASFLAGS) $< -o $@



# Target: clean project.
clean:
	$(REMOVE) $(TARGET).hex $(TARGET).eep $(TARGET).cof $(TARGET).elf \
	$(TARGET).map $(TARGET).sym $(TARGET).lss \
	$(OBJ) $(LST) $(SRC:.c=.s) $(SRC:.c=.d) $(CXXSRC:.cpp=.s) $(CXXSRC:.cpp=.d)

depend:
	if grep '^# DO NOT DELETE' $(MAKEFILE) >/dev/null; \
	then \
		sed -e '/^# DO NOT DELETE/,$d' $(MAKEFILE) > \
			$(MAKEFILE).$$ && \
		$(MV) $(MAKEFILE).$$ $(MAKEFILE); \
	fi
	echo '# DO NOT DELETE THIS LINE -- make depend depends on it.' \
		>> $(MAKEFILE); \
	$(CC) -M -mmcu=$(MCU) $(CDEFS) $(CINCS) $(SRC) $(ASRC) >> $(MAKEFILE)

.PHONY:	all build elf hex eep lss sym program coff extcoff clean depend

Particularly I changed a few things about the avrdude settings. I can’t seem to get it to upload now. Can someone help me with this?

Your question is too vague to get an answer.

Please define "too long" and what "doesn't upload" means. (As in, what happens when you try.)