Makefile: mehrere Sourcefiles kompilieren klappt nicht unter Linux??

avr-gcc -g -mmcu=atmega8 -Wall -Wstrict-prototypes -Os -mcall-prologues -o launchcontroll.out -Wl,-Map,launchcontroll.map launchcontroll.o 

launchcontroll.o: In function `main':

/home/hannes/Arbeitsfläche/Launchcontrol/launchcontroll.c:49: undefined reference to `lcd_init'

/home/hannes/Arbeitsfläche/Launchcontrol/launchcontroll.c:50: undefined reference to `lcd_clear'

/home/hannes/Arbeitsfläche/Launchcontrol/launchcontroll.c:52: undefined reference to `lcd_setcursor'

/home/hannes/Arbeitsfläche/Launchcontrol/launchcontroll.c:53: undefined reference to `lcd_string'

collect2: error: ld returned 1 exit status

make: *** [launchcontroll.out] Fehler 1

# MCU name

MCU = atmega8

# Processor frequency.

#     This will define a symbol, F_CPU, in all source code files equal to the 

#     processor frequency. You can then use this symbol in your source code to 

#     calculate timings. Do NOT tack on a 'UL' at the end, this will be done

#     automatically to create a 32-bit value in your source code.

#     Typical values are:

#    F_CPU =  1000000

#       F_CPU =  1843200

#       F_CPU =  2000000

#       F_CPU =  3686400

#       F_CPU =  4000000

#    F_CPU =  7372800

#       F_CPU =  8000000

#    F_CPU = 11059200

#       F_CPU = 14745600

F_CPU = 16000000

#       F_CPU = 18432000

#       F_CPU = 20000000

#       F_CPU = 8000000

# Output format. (can be srec, ihex, binary)

FORMAT = ihex

# Target file name (without extension).

TARGET = launchcontroll

# Object files directory

OBJDIR = obj

# List C source files here. (C dependencies are automatically generated.)

SRC = $(TARGET).c lcd.c

# List C++ source files here. (C dependencies are automatically generated.)

CPPSRC = 

# List Assembler source files here.

#     Make them always end in a capital .S.  Files ending in a lowercase .s

#     will not be considered source files but generated files (assembler

#     output from the compiler), and will be deleted upon "make clean"!

#     Even though the DOS/Win* filesystem matches both .s and .S the same,

#     it will preserve the spelling of the filenames, and gcc itself does

#     care about how the name is spelled on its command-line.

ASRC =

# Optimization level, can be [0, 1, 2, 3, s]. 

#     0 = turn off optimization. s = optimize for size.

#     (Note: 3 is not always the best optimization level. See avr-libc FAQ.)

OPT = s

# Debugging format.

#     Native formats for AVR-GCC's -g are dwarf-2 [default] or stabs.

#     AVR Studio 4.10 requires dwarf-2.

#     AVR [Extended] COFF format requires stabs, plus an avr-objcopy run.

DEBUG = dwarf-2

//#define F_CPU 8000000UL   //the Mega8 runs with the internal Osc. 

              //on 8MHz

#define F_CPU 16000000UL  //external crystal on  16MHz

#include <avr/io.h>

#include <util/delay.h>

#include <avr/interrupt.h>

#include "lcd-routines.h"