------ Build started: Project: OS, Configuration: Debug AVR ------
Build started.
Project "OS.cproj" (default targets):
Target "PreBuildEvent" skipped, due to false condition; ('$(PreBuildEvent)'!='') was evaluated as (''!='').
Target "CoreBuild" in file "C:\Program Files (x86)\Atmel\Studio\7.0\Vs\Compiler.targets" from project "C:\Users\Admin\Documents\Atmel Studio\7.0\OS\OS\OS.cproj" (target "Build" depends on it):
	Task "RunCompilerTask"
		Shell Utils Path C:\Program Files (x86)\Atmel\Studio\7.0\shellUtils
		C:\Program Files (x86)\Atmel\Studio\7.0\shellUtils\make.exe all --jobs 4 --output-sync 
		Building target: OS.elf
		Invoking: AVR/GNU Linker : 5.4.0
		"C:\Program Files (x86)\Atmel\Studio\7.0\toolchain\avr8\avr8-gnu-toolchain\bin\avr-gcc.exe" -o OS.elf  main.o   -Wl,-Map="OS.map" -Wl,--start-group -Wl,-lm  -Wl,--end-group -Wl,--gc-sections -mmcu=atmega32 -B "C:\Program Files (x86)\Atmel\Studio\7.0\Packs\atmel\ATmega_DFP\1.2.209\gcc\dev\atmega32"  
C:\Users\Admin\Documents\Atmel Studio\7.0\OS\OS\Debug\Makefile(106,1): error: recipe for target 'OS.elf' failed
		main.o: In function `main':
C:\Users\Admin\Documents\Atmel Studio\7.0\OS\OS\main.c(23,1): error: undefined reference to `funktion1'
collect2.exe(0,0): error: ld returned 1 exit status
		make: *** [OS.elf] Error 1
		The command exited with code 2.
	Done executing task "RunCompilerTask" -- FAILED.
Done building target "CoreBuild" in project "OS.cproj" -- FAILED.
Done building project "OS.cproj" -- FAILED.

Build FAILED.
========== Build: 0 succeeded or up-to-date, 1 failed, 0 skipped ==========