a working compilation of blink5.c

make -f c.makefile clean upload
rm -f blink5.hex blink5.o nimcache/stdlib_system.o nimcache/stdlib_unsigned.o
avr-gcc -I ~/i/installs/Nim/lib -g -mmcu=atmega168   -c -o blink5.o blink5.c
avr-gcc -I ~/i/installs/Nim/lib -g -mmcu=atmega168   -c -o nimcache/stdlib_system.o nimcache/stdlib_system.c
avr-gcc -I ~/i/installs/Nim/lib -g -mmcu=atmega168   -c -o nimcache/stdlib_unsigned.o nimcache/stdlib_unsigned.c
avr-gcc blink5.o nimcache/stdlib_system.o nimcache/stdlib_unsigned.o -o blink5.bin 
avr-objcopy -j .text -j .data -O ihex blink5.bin blink5.hex
avrdude -p atmega168 -c arduino -b19200 -e -U flash:w:blink5.hex -P /dev/ttyUSB1

avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.00s

avrdude: Device signature = 0x1e9406
avrdude: erasing chip
avrdude: reading input file "blink5.hex"
avrdude: input file blink5.hex auto detected as Intel Hex
avrdude: writing flash (722 bytes):

Writing | ################################################## | 100% 0.48s

avrdude: 722 bytes of flash written
avrdude: verifying flash memory against blink5.hex:
avrdude: load data flash data from input file blink5.hex:
avrdude: input file blink5.hex auto detected as Intel Hex
avrdude: input file blink5.hex contains 722 bytes
avrdude: reading on-chip flash data:

Reading | ################################################## | 100% 0.42s

avrdude: verifying ...
avrdude: 722 bytes of flash verified

avrdude: safemode: Fuses OK

avrdude done.  Thank you.