Using Arduino Uno instead of FTDI cable to program 1284p w/ Optiboot

[system]

... variable ‘atmega168_optiboot’ must be const in order to be put into read-only section ...

Try adding the word "const" before the hex images in the .h files. eg, change:

byte PROGMEM ATmegaBOOT_168_atmega1280_hex [] = {

to:

const byte PROGMEM ATmegaBOOT_168_atmega1280_hex [] = {

I've already tried it before. It only makes the errors like this:

Atmega_Board_Programmer.cpp:223:3: error: invalid conversion from ‘const byte* {aka const unsigned char*}’ to ‘byte* {aka unsigned char*}’ [-fpermissive]
Atmega_Board_Programmer.cpp:223:3: warning: deprecated conversion from string constant to ‘char*’ [-Wwrite-strings]
Atmega_Board_Programmer.cpp:223:3: warning: deprecated conversion from string constant to ‘char*’ [-Wwrite-strings]
Atmega_Board_Programmer.cpp:223:3: warning: deprecated conversion from string constant to ‘char*’ [-Wwrite-strings]
Atmega_Board_Programmer.cpp:223:3: warning: deprecated conversion from string constant to ‘char*’ [-Wwrite-strings]