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F:\AtecData\avr\datalogger>make
avr-gcc -c -g -Os -Wall -Wstrict-prototypes -IC:\winavr\avrlib -Wa,-ahlms=datalo
gger.lst -mmcu=atmega8 -I. datalogger.c -o datalogger.o
datalogger.c:105: warning: function declaration isn't a prototype
datalogger.c:149: warning: function declaration isn't a prototype
datalogger.c: In function `windDirection':
datalogger.c:154: warning: implicit declaration of function `ISHIGH'
datalogger.c:164: error: invalid operands to binary ==
datalogger.c:171: error: parse error before '}' token
make: *** [datalogger.o] Error 1