error: 'POTC' undeclared (first use in this function)

rm -rf main.o  TestprojektAvrLed.elf dep/* TestprojektAvrLed.hex TestprojektAvrLed.eep TestprojektAvrLed.lss TestprojektAvrLed.map

d:\Programme\AVR Studio 4.19\AvrStudioPlugin\bin\rm.exe: Aufruf von lstat für „dep/*“ nicht möglich: Invalid argument

make: [clean] Fehler 1 (ignoriert)

Build succeeded with 0 Warnings...

avr-gcc  -mmcu=atmega8515 -Wall -gdwarf-2 -std=gnu99 -O1 -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums -MD -MP -MT main.o -MF dep/main.o.d  -c  ../main.c

../main.c: In function 'main':

../main.c:12:4: error: 'POTC' undeclared (first use in this function)

../main.c:12:4: note: each undeclared identifier is reported only once for each function it appears in

make: *** [main.o] Fehler 1

Build failed with 1 errors and 0 warnings...